CN104378297A - Message forwarding method and device - Google Patents

Message forwarding method and device Download PDF

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Publication number
CN104378297A
CN104378297A CN201310357517.1A CN201310357517A CN104378297A CN 104378297 A CN104378297 A CN 104378297A CN 201310357517 A CN201310357517 A CN 201310357517A CN 104378297 A CN104378297 A CN 104378297A
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gateway node
mac address
address
vlan
node
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CN201310357517.1A
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CN104378297B (en
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宋玉兵
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Hangzhou H3C Technologies Co Ltd
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Hangzhou H3C Technologies Co Ltd
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Abstract

The invention discloses a message forwarding method and device. The method includes the steps that gateway nodes annunciate virtual MAC addresses configured by node devices and a WLAN which the addresses belong to through a broadcast tree which can reach all the node devices in a large layer-2 network; after non-gateway node devices receive the virtual MAC addresses configured by the gateway nodes and the WLAN which the addresses belong to through the broadcast tree, corresponding first MAC address forwarding table items are generated, wherein the virtual MAC addresses and the WLAN are annunciated by all the gateway nodes; when data messages with destination MAC addresses being the virtual MAC addresses of the gateway nodes are received by non-gateway nodes, the data messages are forwarded directly instead of conducting large layer-2 network protocol packaging in matching table items of the first MAC address forwarding table items according to the destination MAC addresses; when the gateway nodes receive the data messages and it is determined that the destination MAC addresses of the data messages are the virtual MAC addresses of the data messages, a routing table is searched for to forward the data messages according to the destination MAC addresses of the data messages. By means of the message forwarding method and device, L3 unicast traffic forwarding based on the large layer-2 network is achieved.

Description

A kind of message forwarding method and equipment
Technical field
The present invention relates to the multicasting technology of the communications field, particularly relate to a kind of message forwarding method and equipment.
Background technology
STP(Spanning Tree Protocol is adopted, Spanning-Tree Protocol in three traditional layer data center frameworks) optimize client to the path of server and Supporting connectivity redundancy.Due to the reason such as constringency performance of STP, generally the network size of STP can not more than 100 switches.Simultaneously because STP needs to block redundance unit and link, also reduce Internet resources bandwidth availability ratio.Traditional demand that can not meet data center's scale, bandwidth based on STP alternate device and link scheme, and the STP agreement several seconds convergence time after malfunction occurreds to a few minutes, can not meet the reliability requirement of data center.Therefore, need there is new technology, while meeting double layer network scale, also can make full use of redundance unit and link, improve link utilance, and the convergence time after malfunction occurred of data center can be reduced to submicrosecond even Millisecond.
The virtual utilance that effectively can improve server, reduces energy resource consumption, reduces the O&M cost of client, so Intel Virtualization Technology obtains great development.The virtual raising being not only server utilization brought to data center, also has the change of the network architecture.Virtual machine (Virtual Machine, VM) migrating technology can make the computational resource of data center be allocated flexibly, improves the utilance of resources of virtual machine further.But virtual machine (vm) migration requires IP and the MAC(Media Access Control before and after virtual machine (vm) migration, medium access control) address is constant, and this is in inside, same two layers of territory with regard to needing the network before and after virtual machine (vm) migration.Because the increasing extent of customer requirement virtual machine (vm) migration is large, or even the migration of crossing between different geographical, different machine room, so make the increasing extent of data center's double layer network large, even there is this frontier special topic of extensive double layer network (hereinafter referred to as large double layer network).
Tunneling technique can realize the large double layer network covered in the data center of multiple access switch and core switch.The Typical Representative of tunneling technique is TRILL(TRansparent Interconnection of Lots of Links, multilink transparent interconnection) and SPB(Shortest Path Bridging, shortest path bridge) technology, both are all by using IS-IS(Intermediate System to Intermediate System, Intermediate System-to-Intermediate System) calculating of Routing Protocol and forward mode, realize the extensive expansion of double layer network.These technology are at present just in standardisation process, and conventional switch not only needs software upgrading simultaneously, also needs hardware supports.
In existing large two layers of networking technology, for three layers of forwarding of the travelling across VLAN under large two layers of environment, also there is no reasonable solution, limit the actual deployment of large two layers of networking.
For Trill networking, the RFC that current Trill standard is relevant has just issued soon, and supporting chip is still immature, after related chip processes Trill in a pipeline, just can not be L3 again and forward; After executing L3 forwarding, just can not do Trill process again.
For this problem, in prior art, there is the following two kinds settling mode:
Mode one, employing agency forward
Trill board receives Trill message, after completing Trill termination, is if desired L3 and forwards, then sent to by message L3 agency board to carry out processing forward;
Message if there is receiver external, is then sent to outer net after completing normal L3 agency forwarding by L3 agency board; If Trill has recipient in territory, message needs the Special back collar extension (Loopback port) being again forwarded to Trill board, Trill encapsulation is completed after message winding mouth winding, Trill unicast table is searched according to the Trill message after encapsulation, send to Trill network from corresponding port, its handling process schematic diagram can see Fig. 1.
Mode two, Trill/L3 separating treatment
The special equipment of Trill overseas increase one deck performs the function that L3 forwards.The destination node of Trill, at core node, more than core node adopts the native Ethernet message repeating not with encapsulation, is up to L3 equipment place and carries out L3 forward process.
In addition, in existing large double layer network technology, L3 is forwarded, the gateway backup protocol existed at present, there is the intrinsic problem sharing inequality.For large-scale cloud computation data center (core node is greater than 4), when the L3 flow of the inner travelling across VLAN of data center is larger, forwarding bottleneck can be formed.
For this problem, in prior art, for control plane, by setting up backup group, and elect a master, all ARP requests of client all can only be responded by master, and master is according to certain Load Sharing Algorithm, for different ARP asks to respond different gateway A RP information, the ARP that different like this main frames obtains responds different.
For datum plane, the message of different main frame encapsulation due to gateway A RP different, be sent out and give different gateways, thus sharing of realizing that different main frame flow goes out at Different L 3 gateway.
Realizing in process of the present invention, inventor finds at least there is following problem in prior art:
In settling mode for three layers of forwarding problems of the travelling across VLAN under existing large two layers of environment, mode one needs centralized processing, poor-performing, and proxy configurations is complicated, needs special to act on behalf of board or winding port, causes the wasting of resources; Need extra L3 equipment in mode two, equipment level increases, and adds cost, and meanwhile, the link of Trill destination node and L3 gateway centre exists a lot of loops, need to consider that loop avoids technology, and the performance of L3 forward process is still lower.
Existing gateway backup protocol is shared in the settling mode of uneven problem, for the different data streams that same client sends, cannot share between Different L 3 gateway, cause and share inequality.
Summary of the invention
The embodiment of the present invention provides a kind of message forwarding method and equipment, forwards in order to realize L3 unicast traffic in large double layer network.
In order to reach above object, embodiments provide a kind of message forwarding method, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, described multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, and the method comprises:
Non-gateway node can reach the broadcast tree of all node devices in described large double layer network by one, receives the virtual MAC address of this gateway node configuration that each gateway node is noticed and affiliated vlan information;
Non-gateway node is according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, the outgoing interface that the route that the VLAN in described first mac address forwarding table item VLAN, target MAC (Media Access Control) address belonging to described virtual MAC are described virtual MAC address, outgoing interface is Least-cost in described singlecast router is corresponding;
Non-gateway node receives target MAC (Media Access Control) address when being the data message of virtual MAC address of a gateway node, according to the target MAC (Media Access Control) address of this data message, search the first mac address forwarding table item of coupling, and according to the coupling list item found, directly forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, the method also comprises:
During link down between non-gateway node and gateway node, non-gateway node is according to the topology after renewal, recalculate the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item;
When gateway node delays machine, the outgoing interface of the first mac address forwarding table item that the virtual MAC address that this gateway node of non-gateway node updates configures is corresponding.
The embodiment of the present invention additionally provides a kind of message forwarding method, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, described multiple node device comprises the gateway node as gateway node and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, and the method comprises:
Gateway node can reach the broadcast tree of all node devices in described large double layer network by one, notice the virtual MAC address of this node device configuration and affiliated vlan information, to make non-gateway node device according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, VLAN in described first mac address forwarding table item VLAN belonging to described virtual MAC, target MAC (Media Access Control) address is described virtual MAC address, outgoing interface is outgoing interface corresponding to the route of Least-cost in described singlecast router,
Gateway node receives the data message that target MAC (Media Access Control) address is self virtual MAC address, described data message is the target MAC (Media Access Control) address of non-gateway node according to message, mates that described first mac address forwarding table item directly forwards afterwards and does not carry out large double layer network protocol encapsulation;
Described gateway node, when judging the target MAC (Media Access Control) address of described data message for self virtual MAC address, according to the object IP address of described data message, is searched routing table and is forwarded described data message.
Wherein, the method also comprises:
Each node device is set by described broadcast, and the local mac address newly learnt and affiliated VLAN are advertised to other node devices, and described local mac address comprises the MAC Address that the user network side that connects from this node device learns;
Gateway node receives from described broadcast tree the local mac address and affiliated VLAN that described in the notice of other node devices, other node devices newly learn, and according to the large double layer network forwarding-table item in advance based on this large double layer network protocol generation, generate the second mac address forwarding table item that the local mac address of other node devices described is corresponding, target MAC (Media Access Control) address in described second mac address forwarding table item is the local mac address of other node devices described, and outgoing interface is the outgoing interface going to other nodes described in described large double layer network forwarding-table item;
It is not after the unicast data message of self port mac address or described virtual MAC address that described gateway node receives target MAC (Media Access Control) address, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described second mac address forwarding table item, and directly forward described unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
Wherein, described gateway node is also connected with the routing device of described large double layer network outside;
Each node device arranges the broadcast domain scope of VLAN, wherein, described broadcast domain scope comprises user-side port and the large double layer network side interface be positioned on this VLAN cutting tree on this node device that this node device allows this VLAN to pass through, and described cutting tree obtains the beta pruning that described broadcast tree carries out distribution tree based on VLAN;
Gateway node is when receiving the data message that described routing device sends, search the ARP of the object IP address of mating described data message, and according to the target MAC (Media Access Control) address of the ARP found and outgoing interface, directly forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, if gateway node does not find the ARP of the object IP address of mating described data message, described method also comprises:
Described gateway node is in the broadcast domain of VLAN corresponding to this data message, direct broadcast transmission does not carry out large double layer network protocol encapsulation for asking an ARP request message of MAC Address corresponding to the object IP address of described data message, the transmitting terminal sender IP address of a described ARP request message is the transmit port IP address of described gateway node, and source MAC and transmitting terminal MAC Address are the transmit port MAC Address of described gateway node;
Described gateway node is according to the first arp reply message for an ARP request message received, set up the ARP that the object IP address of described data message is corresponding, and according to the ARP of this foundation, forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, a gateway node in same VLAN is elected as the primary gateway node of this VLAN, and the method also comprises:
Gateway node receives the 2nd ARP request message of the MAC Address for asking gateway node that main frame sends, and when determining the primary gateway node certainly as corresponding VLAN, generate the second arp reply message, the target MAC (Media Access Control) address of this second arp reply message is the MAC Address of described main frame, source MAC and transmitting terminal sender MAC Address are the virtual MAC address of described gateway node, sender IP address is the virtual IP address of described gateway node, learns and set up the incidence relation between the virtual IP address of described gateway node and virtual MAC address to make described main frame;
Described gateway node, according to the target MAC (Media Access Control) address of described arp reply message, mates in the second mac address forwarding table item, and is directly forwarded described arp reply message by the outgoing interface of coupling list item and do not carried out large double layer network protocol encapsulation.
Wherein, the election of described primary gateway node comprises:
Each gateway node in same VLAN is broadcasted and is carried respective port IP address, port mac address, the neighbor uni-cast of empty IP and virtual MAC address and primary gateway node voting protocol message in this VLAN;
Each gateway node in same VLAN receives the described protocol massages that other gateway nodes send, and election port IP address and/or port mac address meet the gateway node of preset rules, as described primary gateway node.
Wherein, also comprise:
During link down between non-gateway node and gateway node, this gateway node upgrades the outgoing interface of the ARP reaching All hosts under this non-gateway node;
When non-gateway node delays machine down, gateway node deletes the ARP of the All hosts under this non-gateway node;
During primary gateway node down in VLAN, in this VLAN, other gateway nodes re-elect the primary gateway node in this VLAN;
Gateway node is when finding that outside router is unreachable, exit the election of the primary gateway node of this gateway node place VLAN, primary gateway node is re-elected to trigger other gateway nodes, forbid self three all layer interface, and by described broadcast tree notice virtual MAC address cancel message, with the outgoing interface making non-gateway node device upgrade described first mac address forwarding table item corresponding to described virtual MAC address.
The embodiment of the present invention also provides a kind of network equipment, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, described multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, the described network equipment is applied in described large double layer network as non-gateway node, and this network equipment comprises:
Address management module, for can reach the broadcast tree of all node devices in described large double layer network by one, receives the virtual MAC address of this gateway node configuration that each gateway node is noticed and affiliated vlan information;
List item maintenance module, for the large double layer network mark of each gateway node corresponding to the same virtual MAC address received according to large double layer network agreement and described address management module, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, the outgoing interface that the route that the VLAN in described first mac address forwarding table item VLAN, target MAC (Media Access Control) address belonging to described virtual MAC are described virtual MAC address, outgoing interface is Least-cost in described singlecast router is corresponding;
Packet forwarding module, when being the data message of virtual MAC address of a gateway node for receiving target MAC (Media Access Control) address when the described network equipment, according to the target MAC (Media Access Control) address of this data message, search the first mac address forwarding table item of coupling, and according to the coupling list item found, directly forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, described list item maintenance module also for,
During link down between the described network equipment and gateway node, according to the topology after renewal, recalculate the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item;
When gateway node delays machine, upgrade the outgoing interface of the first mac address forwarding table item corresponding to virtual MAC address of this gateway node configuration.
The embodiment of the present invention additionally provides a kind of network equipment, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, described multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, the described network equipment is applied in described large double layer network as gateway node, and this network equipment comprises:
Address management module, for can reach the broadcast tree of all node devices in described large double layer network by one, notice the virtual MAC address of this node device configuration and affiliated vlan information, to make non-gateway node device according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, VLAN in described first mac address forwarding table item VLAN belonging to described virtual MAC, target MAC (Media Access Control) address is described virtual MAC address, outgoing interface is outgoing interface corresponding to the route of Least-cost in described singlecast router,
Packet forwarding module, for receiving when the described network equipment data message that target MAC (Media Access Control) address is self virtual MAC address, and when judging the target MAC (Media Access Control) address of described data message for self virtual MAC address, according to the object IP address of described data message, search routing table and forward described data message; Wherein, described data message is the target MAC (Media Access Control) address of non-gateway node according to message, mates that described first mac address forwarding table item directly forwards afterwards and does not carry out large double layer network protocol encapsulation.
Wherein, this network equipment also comprises: list item maintenance module;
Described address management module also for, receive the local mac address that newly learns of other node devices and affiliated VLAN described in the notice of other node devices from described broadcast tree; Described local mac address comprises the MAC Address learnt from the user network side of described other node devices connection;
List item maintenance module, for basis in advance based on the large double layer network forwarding-table item of this large double layer network protocol generation, generate the second mac address forwarding table item that the local mac address of other node devices described is corresponding, target MAC (Media Access Control) address in described second mac address forwarding table item is the local mac address of other node devices described, and outgoing interface is the outgoing interface going to other node devices described in described large double layer network forwarding-table item;
Described packet forwarding module also for, after when the described network equipment, to receive target MAC (Media Access Control) address be not the unicast data message of self port mac address or described virtual MAC address, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described second mac address forwarding table item, and directly forward described unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
Wherein, the described network equipment is also connected with the routing device of described large double layer network outside;
In described large double layer network, each node device is provided with the broadcast domain scope of VLAN, wherein, described broadcast domain scope comprises user-side port and the large double layer network side interface be positioned on this VLAN cutting tree on this node device that this node device allows this VLAN to pass through, and described cutting tree obtains the beta pruning that described broadcast tree carries out distribution tree based on VLAN;
Described packet forwarding module also for, when receiving the data message that described routing device sends, search the ARP of the object IP address of mating described data message, and according to the target MAC (Media Access Control) address of the ARP found and outgoing interface, directly forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, described packet forwarding module also for, if do not find the ARP of the object IP address of mating described data message, in the broadcast domain of VLAN corresponding to this data message, direct broadcast transmission does not carry out large double layer network protocol encapsulation for asking an ARP request message of MAC Address corresponding to the object IP address of described data message, the transmitting terminal sender IP address of a described ARP request message is the transmit port IP address of the described network equipment, and source MAC and transmitting terminal MAC Address are the transmit port MAC Address of the described network equipment;
Described list item maintenance module also for, when the described network equipment receives the first arp reply message according to receiving for an ARP request message, set up the ARP that the object IP address of described data message is corresponding;
Described packet forwarding module also for, according to the ARP that described list item maintenance module is set up, forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, a gateway node in same VLAN is elected as the primary gateway node of this VLAN,
Described packet forwarding module also for, when receiving the 2nd ARP request message of the MAC Address for asking gateway node that main frame sends, and when determining that the described network equipment is the primary gateway node of corresponding VLAN, generate the second arp reply message, the target MAC (Media Access Control) address of this second arp reply message is the MAC Address of described main frame, source MAC and transmitting terminal sender MAC Address are the virtual MAC address of the described network equipment, sender IP address is the virtual IP address of the described network equipment, learn to make described main frame and set up the incidence relation between the virtual IP address of the described network equipment and virtual MAC address, according to the target MAC (Media Access Control) address of described arp reply message, mate in the second mac address forwarding table item, and directly forward described arp reply message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
Wherein, the described network equipment also comprises:
Election module, carries self port IP address of the described network equipment, port mac address, the neighbor uni-cast of empty IP and virtual MAC address and primary gateway node voting protocol message for broadcast in the VLAN belonging to the described network equipment; Receive the described protocol massages that in described VLAN, other gateway nodes send, election port IP address and/or port mac address meet the gateway node of preset rules, as described primary gateway node.
Wherein, described list item maintenance module also for, during link down between non-gateway node and the described network equipment, upgrade the outgoing interface of the ARP reaching All hosts under this non-gateway node; When non-gateway node delays machine down, delete the ARP of the All hosts under this non-gateway node;
Described address management module also for, when the described network equipment finds that outside router is unreachable, forbid self three all layer interface, and by described broadcast tree notice virtual MAC address cancel message, with the outgoing interface making non-gateway node device upgrade described first mac address forwarding table item corresponding to described virtual MAC address;
Described election module also for, when the described network equipment finds that outside router is unreachable, exit the election of the primary gateway node of this gateway node place VLAN, re-elect primary gateway node to trigger other gateway nodes.
In the above embodiment of the present invention, gateway node can reach the broadcast tree of all node devices in large double layer network by one, notices the virtual MAC address of this node device configuration and affiliated VLAN; Non-gateway node device sets the virtual MAC address and affiliated VLAN receiving this gateway node configuration that each gateway node is noticed by this broadcast after, according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to this virtual MAC address; When non-gateway node receives data message, and when determining that the target MAC (Media Access Control) address of this data message is the virtual MAC address of gateway node, this non-gateway node is according to the target MAC (Media Access Control) address of this data message, the list item of match query in the first mac address forwarding table, and according to the coupling list item inquired, forward this data message and do not carry out large double layer network protocol encapsulation; Gateway node receives this data message, and when determining the target MAC (Media Access Control) address of this data message for self virtual MAC address, gateway node, according to the object IP address of this data message, is searched routing table and is forwarded this data message, and the L3 unicast traffic achieved based on large double layer network forwards.
Accompanying drawing explanation
Fig. 1 a kind ofly in prior art adopts agency to forward to solve L3 to forward and Trill process can not the schematic diagram of mode of coexistence problems;
The schematic diagram of VLAN broadcast domain in a kind of Trill networking that Fig. 2 provides for the embodiment of the present invention;
The configuration diagram of a kind of Trill networking that Fig. 3 provides for the embodiment of the present invention;
The schematic flow sheet of a kind of three layers of unicast message retransmission method that Fig. 4 provides for the embodiment of the present invention;
The Trill networking internal fault scene schematic diagram that Fig. 5 ~ 8 provide for the embodiment of the present invention;
The structural representation of a kind of network equipment that Fig. 9 provides for the embodiment of the present invention;
The structural representation of the another kind of network equipment that Figure 10 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of technical scheme of message repeating, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, the plurality of node device comprises the gateway node as gateway node and the non-gateway node as access device, each gateway node of same VLAN is all configured with three layers of (L3) interface of this VLAN, three layer interfaces of each gateway node of same VLAN have mutually different IP address and MAC Address, i.e. real IP address and real MAC Address.In the embodiment of the present invention, for this three layer interface of each gateway node of same VLAN, also configure identical virtual IP address and virtual MAC address, the different gateway nodes namely under same VLAN, there is identical virtual IP address and virtual MAC address.
In the embodiment of the present invention, gateway node can reach the broadcast tree of all node devices in large double layer network by one, notice the virtual MAC address of this node device configuration and affiliated VLAN.Here, the virtual MAC address of notice is the virtual MAC address that three layers of (L3) interface virtual IP address is corresponding.
Non-gateway node device sets the virtual MAC address and affiliated VLAN receiving this gateway node configuration that each gateway node is noticed by this broadcast after, can according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address received, calculate the singlecast router going to each gateway node of same VLAN, and then generate mac address forwarding table item corresponding to this virtual MAC address (hereinafter referred to as the first mac address forwarding table item), wherein, VLAN in this first mac address forwarding table item VLAN belonging to this MAC Address, target MAC (Media Access Control) address is this virtual MAC address, outgoing interface is outgoing interface corresponding to the route of Least-cost in this singlecast router,
When non-gateway node receives data message, and when determining that the target MAC (Media Access Control) address of this data message is the virtual MAC address of gateway node, this non-gateway node can according to the target MAC (Media Access Control) address of this data message, the list item of match query in the first mac address forwarding table, and according to the coupling list item inquired, directly forward this data message and do not carry out large double layer network protocol encapsulation;
Gateway node receives this data message, and when determining the target MAC (Media Access Control) address of this data message for self virtual MAC address, gateway node, according to the object IP address of this data message, is searched routing table and forwarded this data message.
Wherein, when non-gateway node is according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, when there is the minimum route of many costs (cost) in going in the singlecast router of same VLAN of calculating, then need to form equal-cost route, correspondingly, the outgoing interface in the first mac address forwarding table item that this virtual MAC address of this non-gateway node generation is corresponding is the aggregation port of the outgoing interface formation that in this equal-cost route, each route is corresponding.
Correspondingly, non-gateway node is when forwarding target MAC (Media Access Control) address is the data message of above-mentioned virtual MAC address, due to according to this virtual MAC address search to the outgoing interface of the first mac address forwarding table item of coupling be aggregation port, non-gateway node can pass through hash(Hash) algorithm selects a port as the outgoing interface of this data message forwarding from this aggregation port.
In embodiments of the present invention, each node device also needs to be set by above-mentioned broadcast, the local mac address newly learnt and affiliated VLAN are advertised to other node devices, and this local mac address comprises the MAC Address that the user network side that connects from this node device learns;
The local mac address that these other node devices that gateway node can pass through from other node devices of this broadcast tree reception newly learn and affiliated VLAN, and according to the large double layer network forwarding-table item in advance based on this large double layer network protocol generation, generate mac address forwarding table item corresponding to the local mac address of these other node devices (hereinafter referred to as the second mac address forwarding table item), target MAC (Media Access Control) address in this second mac address forwarding table item is the local mac address of other node devices above-mentioned, outgoing interface is the outgoing interface going to these other nodes in this large double layer network forwarding-table item.
When gateway node equipment receives unicast data message, and determine this unicast data message be not self port mac address or virtual MAC address time, this gateway node can according to the target MAC (Media Access Control) address of this unicast data message and affiliated VLAN, mate in above-mentioned second mac address forwarding table item, and directly forward this unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network agreement.
Further, in embodiments of the present invention, said gateway node is also connected with the routing device of large double layer network outside, when gateway node receives the data message of this routing device transmission, when the target MAC (Media Access Control) address of data message is own MAC address, check the object IP address of data message, if find the direct connection network segment of this object IP address at oneself, the ARP then can mated according to the object IP address search of this data message, and according to the target MAC (Media Access Control) address of the ARP found and outgoing interface, this data message of direct forwarding and do not carry out large double layer network protocol encapsulation.
Wherein, when gateway node does not find the ARP of object IP address of this data message of coupling according to the object IP address of the data message received, this gateway node needs in the broadcast domain of VLAN corresponding to this data message, direct broadcast transmission does not carry out large double layer network encapsulation for asking the ARP request message of MAC Address corresponding to the object IP address of this data message (hereinafter referred to as an ARP request message), the sender(transmitting terminal of the one ARP request message) IP address is the real IP address of three layers of transmit port of this gateway node, source MAC and sender MAC Address are the real MAC Address of three layers of transmit port of this gateway node.
When this gateway node receives arp reply message (hereinafter referred to as the first arp reply message) for an ARP request message, the ARP that this gateway node object IP address that can set up this data message according to this first arp reply message is corresponding, and according to the ARP of this foundation, directly forward this data message and do not carry out large double layer network protocol encapsulation.
Wherein, gateway node during broadcast ARP request message, needs to broadcast according to the broadcast domain scope of the VLAN pre-set in the broadcast domain of VLAN.
Concrete, in embodiments of the present invention, the broadcast domain scope of VLAN can be set on each node device, this broadcast domain scope comprises user-side port and the large double layer network side interface on this VLAN cutting of the position tree on this node device that this node device allows this VLAN to pass through, and this cutting tree obtains the beta pruning that above-mentioned broadcast tree carries out distribution tree based on VLAN.
Further, in embodiments of the present invention, each gateway node in same VLAN also needs the election carrying out primary gateway node, to elect a gateway node as the primary gateway node of this VLAN; When gateway node receives ARP request message (hereinafter referred to as the 2nd ARP request message) of the MAC Address for asking gateway node that main frame sends, primary gateway node is only had to respond.
Concrete, in embodiments of the present invention, each gateway node in same VLAN can be broadcasted and be carried the real IP address of self three layers of port, the real MAC Address of three layers of port, the neighbor uni-cast of virtual IP address and virtual MAC address and primary gateway node voting protocol message in this VLAN; When each gateway node in same VLAN receives the above-mentioned protocol massages of other gateway nodes transmission, the real IP address of election port and/or the real MAC Address of port meet the gateway node of preset rules, as primary gateway node.Such as, the gateway node that port IP address+port mac address can be elected maximum is as primary gateway node, or the maximum gateway node of election port IP address or port mac address is as primary gateway node.
When gateway node receives the 2nd ARP request message of the MAC Address for asking gateway that main frame sends, gateway node needs to determine self to be whether the primary gateway node of corresponding VLAN, if determine from the primary gateway node as corresponding VLAN, then generate arp reply message (hereinafter referred to as the second arp reply message), the target MAC (Media Access Control) address of this second arp reply message is the MAC Address of this main frame, source MAC and sender MAC Address are the virtual MAC address of this gateway node, sender IP address is the virtual IP address of described gateway node, learn to make main frame and set up the incidence relation between the virtual IP address of gateway node and virtual MAC address, self be not the primary gateway node of corresponding VLAN if determine, then this gateway node does not respond this arp reply message.
Wherein, after the gateway node generation arp reply message of primary gateway node, according to the target MAC (Media Access Control) address of this arp reply message, mate in the second mac address forwarding table item, and directly forward this arp reply message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
It should be noted that, by describing above and can finding out, in the technical scheme that the embodiment of the present invention provides, non-gateway node is to gateway node for transmitting data message, large double layer network node device is to ARP request message, transmission/the forwarding of arp reply message, large two layers of encapsulation are not carried out in being of taking, and directly the mode of match query mac address forwarding table item is carried out, therefore, the technical scheme understood the embodiment of the present invention better to make those skilled in the art and provide, below the technical scheme of two layers of clean culture/broadcast traffic forwarding in large double layer network is described in detail.
At the control plane of large double layer network, each node device can reach the broadcast tree of all node devices in large double layer network by one, the local mac address newly learnt and affiliated VLAN are advertised to other node devices (wherein, it should be noted that, in embodiments of the present invention, for the node device as gateway node, it is the virtual MAC address of this gateway node configuration by the MAC Address that above-mentioned broadcast tree is advertised to other node devices); Node device receives the local mac address of other node devices that other node devices are noticed from this broadcast tree, and pass through in advance based on the large double layer network forwarding-table item of this large double layer network protocol generation, generate original MAC address forwarding-table item (in embodiments of the present invention, being the first mac address forwarding table item and the second mac address forwarding table item); At the datum plane of large double layer network, after node device receives unicast data message, if the target MAC (Media Access Control) address of this unicast data message is not the MAC Address of self, then according to target MAC (Media Access Control) address and the affiliated VLAN of this unicast data message, mate in this original MAC address forwarding-table item, and directly forward this unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
Concrete, as the first MAC Address that these other node devices that a node device receives the notice of other node devices newly learn and an affiliated VLAN, according to the large double layer network mark of these other node devices, inquiry is transmitted based on the large double layer network of large double layer network protocol generation in advance, determine the outgoing interface that these other node devices are corresponding, and then generate original MAC address forwarding-table item corresponding to this first MAC Address.
Wherein, node device determines that the outgoing interface that other node devices are corresponding specifically can realize in the following manner:
Node device from large double layer network is transmitted, can find the forwarding-table item that the large double layer network mark of these other node devices is corresponding; If only comprise an outgoing interface in the forwarding-table item searched, then the outgoing interface will found, as the outgoing interface that other node devices are corresponding; If the forwarding-table item found comprises plural outgoing interface, then this plural outgoing interface is formed an aggregation port, and using this aggregation port as outgoing interface corresponding to other node devices.Wherein, the plural outgoing interface that above-mentioned forwarding-table item comprises can be exist with the form of equal cost multipath.
Correspondingly, when node device needs the outgoing interface by mating list item to forward unicast data message, if the outgoing interface of coupling list item is aggregation port, then can pass through HASH(Hash) member port of this aggregation port of algorithms selection, and by selected member port, directly forward this unicast data message and do not carry out large double layer network protocol encapsulation.
Wherein, it should be noted that, in embodiments of the present invention, due to gateway node by broadcast tree notice be virtual MAC address, and the virtual MAC address of each gateway node configuration is identical in same VLAN, therefore, non-gateway node device is when the mac address forwarding table item that this virtual MAC address of generation is corresponding, need the large double layer network mark according to large double layer network agreement each gateway node corresponding with the same virtual MAC address received, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address.
Further, in the technical scheme of two layers of clean culture/broadcast traffic forwarding in large double layer network, when the local mac address of node device is aging, node device also needs the aging local mac address of generation and affiliated VLAN to be advertised to other node devices, is deleted the forwarding-table item occurred corresponding to aging MAC Address and affiliated VLAN by other node devices.
Concrete, the aging local mac address of generation and affiliated VLAN by broadcast tree, can be advertised to other node devices by each node device; When node device from broadcast tree receive other node devices there is aging MAC Address (the second MAC Address) and affiliated VLAN time, from original MAC address is transmitted, delete this second MAC Address and the forwarding-table item corresponding to affiliated VLAN.
In the embodiment of the present invention, node device, when MAC address aging, can carry out MAC Address by notification packet synchronous among the nodes.The situation that MAC Address is false aging is likely there is in practical application.So-called MAC Address vacation is aging, after referring to that terminal data sends message, one section, interval long period (being greater than the MAC address aging time) and no longer send message, and then transmission message, repeatedly like this, cause the MAC Address of this terminal to be learnt on the port of node device, aging, learn again, aging again ..., wherein aging or learning process all can cause the transmission of notification packet each time.
In order to reduce frequent false aging the caused notification packet quantity forwarded of MAC Address, alleviate the CPU processing load of node device, in the present embodiment, each node device can for the combination of self different interface and VLAN, configure the MAC Address pond of a correspondence respectively, for being maintained in the local mac address belonging to corresponding VLAN that this corresponding interface learns;
Each node device arrives local mac address in new study, such as, after the MAC Address that record newly learns to arrive in MAC forwarding-table item also sets up corresponding ageing timer, during the local mac address that this new study arrives if do not include in corresponding MAC Address pond, then the local mac address newly learnt is increased in MAC Address pond.After there is one section of aging Preset Time in local mac address, just aging local mac address is deleted from corresponding MAC Address pond, that is, after MAC Address in MAC forwarding-table item is aging because of ageing timer time-out, after one section of Preset Time, just this MAC Address is deleted from corresponding MAC Address pond.
Accordingly, each node device, adds when newly learning the local mac address arrived further in MAC Address pond, by described broadcast tree, the local mac address newly learnt and affiliated VLAN is advertised to other node devices; And, when deleting aging local mac address in MAC Address pond, by described broadcast tree, aging local mac address and affiliated VLAN are advertised to other node devices.That is, the MAC address aging in MAC forwarding-table item directly can't trigger the transmission of notification packet, but after waiting for that this MAC Address is deleted from MAC Address pond, just goes to send corresponding notification packet.
Correspond, in embodiments of the present invention, non-gateway node also can carry out burin-in process according to the MAC address aging mode in the technical scheme of two layers of clean culture/broadcast traffic forwarding in above-mentioned large double layer network to local mac address.
For broadcasting packet, in the technical scheme of two layers of clean culture/broadcast traffic forwarding in large double layer network, the mode directly broadcasted according to chip vlan broadcast domain scope (bitmap) can be adopted to forward.
Concrete, the broadcast domain scope of VLAN can be set on each node device, wherein, this broadcast domain scope comprises user-side port and the large double layer network side interface be positioned on this VLAN cutting tree on this node device that this node device allows this VLAN to pass through, and this VLAN cutting tree obtains the beta pruning that this broadcast tree carries out distribution tree based on VLAN;
After node device receives data message to be broadcast, determine VLAN belonging to this data message to be broadcast, and on other ports except receiving port included by the broadcast domain scope of this VLAN, this data message to be broadcast of direct forwarding and do not carry out large double layer network protocol encapsulation, wherein, this data message to be broadcast comprises unknown unicast message, broadcasting data messages and unknown multicast packets.
Correspond, in embodiments of the present invention, for the process of broadcasting packet, carry out broadcast traffic pass-through mode in the technical scheme that two layers of clean culture/broadcast traffic can be adopted in above-mentioned large double layer network to forward and the broadcasting packet in the embodiment of the present invention is forwarded.
For the Trill technology in data center, in embodiments of the present invention, can arrange the broadcast domain scope of each vlan in hardware chip according to the vlan cutting tree in trill territory, user-side port carrys out corresponding setting according to vlan port allowing pass through; For trill mouth, can not arrange according to allowing the vlan passed through, but need the vlan cutting tree calculated according to trill to carry out corresponding setting (needing to remove the consistency check that equipment upper port allows to comprise in the broadcast bitmap of vlan and this vlan passed through this port).
For different vlan, different vlan cutting trees can be used to realize the load balancing of broadcast traffic.As shown in Figure 2, the link of bold portion is the broadcast domain of vlan1, according to this link topology, on nickname-1, the bitmap arranging vlan1 comprises the port of lower extension main frame in user-side port P5(nickname-1 to this VLAN) and up going port P1-P4(be respectively the port of nickname-1 to nickname-g1 ~ nickname-g4); On nickname-g1, the bitmap arranging vlan1 only comprises the port that P1, P4 and Pn(are respectively nickname-g1 to nickname-1, nickname-4, nickname-n), nickname-4 only to comprise in user-side port P5(nickname-4 to this VLAN the port of lower extension main frame) and the port of up going port P1(nickname-4 to nickname-g1); On nickname-n, only comprise the port of lower extension main frame in user-side port P5(nickname-n to this VLAN) and the port of up going port P1(nickname-n to nickname-g1).For the setting principle of the bitmap of vlan2 on each RB with the link of vlan1(dotted portion), in this no longer repeated description.In the message received from nickname-1 user-side port is needed to broadcast in vlan1, only need to carry out broadcasting according to corresponding vlan bitmap, this broadcasting packet along the link of bold portion, can arrive the RB that all vlan1 are relevant, and can not produce loop.
Below for the Trill technology in data center, the message repeating technical scheme that the embodiment of the present invention provides is described in detail, relative theory is equally applicable to other large two layers of networking technology, as Vxlan(virtual Extended VLAN, virtual extended VLAN(Virtual Local Area Network, VLAN), the draft(draft of IETF)), SPB technology etc.
Adopt the large double layer network of data center of Trill technique construction, be usually divided into core layer, Access Layer.Usually, the equipment running Trill agreement is called RBridge(and Routing Bridge, has the bridge equipment of routing forwarding characteristic, also referred to as routing bridge, hereinafter referred to as RB), RB forms Trill territory (i.e. Trill network).RB by running the topology in the cognitive Trill territory of link-state protocol, and uses shortest path tree algorithm to generate the route forwarding table (being referred to as Trill routing table) arriving other each RB in Trill network from this RB.
In embodiments of the present invention, when in Trill territory, each RB uses Trill control protocol to carry out nickname router-level topology, the nickname unicast routing table of generation and multicast table only retain on software, and do not issue hardware.
Correspondingly, nickname forwarding-table item is not had in hardware forwarding table due to RB each in Trill territory, therefore, when RB each in Trill territory uses ESADI(End Station Address Information, agreement for terminal MAC address active synchronization between each RB) protocol massages carry out mutually noticing to the local mac address of each RB and synchronous time, ESADI protocol massages needs to be sent to CPU and carries out software forward and process.Wherein, on software, can generate the broadcast tree of a Trill in advance, do not do any cutting, all nodes (in Trill territory each RB) can reach, and are used for specially forwarding ESADI protocol massages.
It should be noted that, in order to prevent the forwarding loop because MAC Address automatic learning causes, in embodiments of the present invention, in Trill territory, all user-side port need to forbid MAC automatic learning (forbidding that hardware learns), change the mode that software learning or manual configuration or agreement generate automatically into; Trill mouth (hybrid(mixes) mouth) forbid learning (forbidding that software, hardware learn), change the mode that manual configuration or agreement generate automatically into.In addition, when using ESADI protocol synchronization MAC Address, all nodes (comprising transmission node (i.e. transit node)) all need process ESADI message.
Simultaneously, the RB node being configured to gateway node in Trill territory also needs to run EGRP(Enhanced Gateway Redundancy Protocol, strengthen gateway backup protocol), for multiple gateway nodes of same VLAN, except needing to configure except different real IP address/real MAC Address, also need to configure identical virtual IP address/virtual MAC address (namely the real IP address/real MAC Address of each gateway node of same VLAN is different, and virtual IP address/virtual MAC address is identical).
After enabling EGRP agreement, the RB node being configured to gateway node sends EGRP protocol massages in VLAN, and this EGRP protocol massages can adopt the mode of broadcast transmission in VLAN, carries out neighbor uni-cast and master election.
Wherein, each gateway node utilize EGRP agreement carry out neighbor uni-cast and master election can be specially:
Each gateway node sends EGRP protocol massages in VLAN, can carry respective equipment identification information, port IP address, port mac address, empty IP and virtual MAC address in this EGRP protocol massages; After in this VLAN, other gateway nodes receive this EGRP protocol massages, port IP address in message and/or port mac address and the port IP address of self and/or port mac address are made comparisons, by comparing, the gateway node of port IP address+port mac address maximum (or port IP address or port mac address maximum) will become master, and all the other gateway nodes are then as slave.
Wherein, this EGRP protocol massages can periodically send, and the transmission cycle is arranged according to actual scene.When slave within a certain period of time (EGRP as twice sends the cycle) do not receive the EGRP protocol massages (can determine according to the device identification of carrying in EGRP protocol massages whether the EGRP protocol massages that receives is that master sends) that master sends, then think as the gateway node down of master, need the election again carrying out neighbor uni-cast and new master between remaining gateway node.
Wherein, for multiple gateway nodes of same VLAN, receiving host(main frame) the ARP(Address Resolution Protocol that sends, address resolution protocol) request message time, the gateway node being elected as master is only had to need to respond response message, and this response message is the ARP message that non-Trill encapsulates, and the outer layer MAC address of this ARP message and sender MAC Address are the virtual MAC address of gateway node.And the handling process of ARP for gateway node request host, used the source MAC of real MAC Address as ARP request message of self by gateway node, and do not use virtual MAC address.
For the diffusion of MAC Address and synchronous, in embodiments of the present invention, for the RB equipment being configured to gateway node, when by ESADI protocol synchronization MAC Address, can be configured to synchronous virtual MAC address, the virtual MAC address by self is carried in ESADI protocol massages carries out diffusion with synchronous.
After in Trill territory, each RB receives ESADI protocol massages, extract MAC Address, vlan information and the affiliated nickname information of wherein carrying, and inquire about corresponding nickname routing table according to this nickname, this nickname routing table is converted to MAC and transmits and issue Forwarding plane.
Concrete, the nickname in corresponding nickname route table items can be replaced with the MAC+VLAN carried in ESADI protocol massages, if the outbound port of this nickname route table items is single outbound port, then in corresponding MAC address entries, outbound port directly uses the outbound port of this nickname route table items; If this nickname route table items has equal-cost route, then the outbound port in corresponding MAC address entries can be the aggregation port that in this nickname route table items, each port (port that each equal-cost route is corresponding) is corresponding.
It should be noted that, it is identical that gateway node due to same VLAN has identical virtual IP address/virtual MAC address, for non-gateway node, in order to be generated to the equative route of the virtual MAC address of gateway node, non-gateway node needs to calculate respectively the singlecast router of this node each gateway node corresponding to this virtual MAC address, and using path minimum for cost in this singlecast router at the outbound port of this node as the outbound port (outbound port in the MAC forwarding-table item that namely this virtual MAC address is corresponding) to this virtual MAC address; If there is the path that many cost are minimum, just choose many this paths, the outbound port of these paths at this node is listed together, if share an outbound port, the outbound port that gateway mac is corresponding is exactly an independent physical port; If have multiple, then using the outbound port as this virtual MAC address after the polymerization of these physical ports.
When RB each in Trill territory receives data message, Trill encapsulation is not carried out to this message, and according to the MAC forwarding-table item of correspondence, message is forwarded; If when the outbound port of the MAC forwarding-table item inquired according to the target MAC (Media Access Control) address of message is single port, then this message is forwarded from this outbound port; If the outbound port of the MAC forwarding-table item inquired according to the target MAC (Media Access Control) address of message is aggregation port, then can be shared by the hash of corresponding aggregated links, the port that certain sub-links of selective polymerization link is corresponding forwards this message.
For L3 data message, when gateway node carries out L3 forwarding to this message, can directly be transmitted to outer network router, and not relate to the process of separating Trill encapsulation; Correspondingly, when outer network router forwards the packet to the gateway node of destination host place VLAN, do not relate to the process to adding Trill encapsulation yet.
Wherein, because gateway node each in same VLAN is configured with identical virtual IP address/virtual MAC address, and gateway node carry out MAC Address synchronous time synchronous MAC Address be virtual MAC address, therefore, to should the outbound port of virtual MAC address be generally as aggregation port (comprising the port that this RB connects each gateway node) in transmitting as the MAC that the RB of access layer equipment generates in Trill territory, therefore, when the RB as access layer equipment needs the L3 data message receiving host transmission to be sent to gateway node, hash can be carried out by the aggregated links that outbound port in the MAC forwarding-table item of target MAC (Media Access Control) address (the virtual MAC address of the gateway node) correspondence to this L3 data message is corresponding, the port that certain sub-links of selective polymerization link is corresponding forwards this message, realize sharing flow.
It should be noted that, in embodiments of the present invention, the difference of the aggregation port in MAC address entries and conventional polymeric port is: the equipment at traditional aggregated links two ends all needs configuration polymerization, and the aggregated links in the embodiment of the present invention only needs from the angle of a side apparatus is aggregated links, opposite end not necessarily needs to be aggregated links.
In addition, when the RB as gateway node in Trill receives the arp reply message that access node (non-gateway node) returns, need the MAC table self stored according to the source MAC inquiry of this arp reply message, and using the outbound port in MAC address entries corresponding for this source MAC as the outbound port (this outbound port can be single port or aggregation port) in ARP, wherein, when gateway node exists equative route to access node, this outbound port is aggregation port.
Can be found out by above flow process, in embodiments of the present invention, when in large double layer network, equipment receives data message, large two-layer protocol encapsulation is not carried out to this message, but according to the target MAC (Media Access Control) address of data message inquiry MAC address entries, and according to the MAC forwarding-table item inquired by primary with native(for this data message) form forwards.When gateway node determines that this data message needs to carry out L3 forwarding, do not need the process carrying out removing large two layers of encapsulation, outer network router can be sent to; Correspondingly, when this message is sent to the gateway node of other VLAN by outer network router, the process carrying out large two layers of encapsulation is not needed yet, avoid and to forward and large two-layer protocol adds the/problem of decapsulation at pipeline process L3, reduce the requirement to chip, enhance the deployable of large double layer network;
Simultaneously, due to the large two-layer equipment being configured to gateway node carry out MAC Address synchronous time, what use is virtual MAC address, and the virtual MAC address of each gateway node of same VLAN is identical, therefore, outbound port in the MAC forwarding-table item of the corresponding gateway node generated in large two-layer equipment is aggregation port, when large two-layer equipment to need data message forwarding to gateway node, the aggregated links corresponding to outbound port in corresponding MAC forwarding-table item can carry out hash, the port that certain sub-links of selective polymerization link is corresponding forwards this message, achieve the load balancing to flow.
In order to be illustrated more clearly in the embodiment of the present invention, below for the Trill group-network construction shown in Fig. 3, the specific implementation process of the message repeating technology that the embodiment of the present invention provides is described.
As shown in Figure 3, be the configuration diagram of a kind of Trill networking that the embodiment of the present invention provides, wherein:
The nickname of each access layer equipment (i.e. access node) be respectively nickname-1, nickname-2 ..., nickname-n;
The nickname of each core layer equipment (i.e. core node) is respectively nickname-g1, nickname-g2, nickname-g3 and nickname-g4;
Nickname-g1(and nickname is the equipment of nickname-g1, lower with), nickname-g2, nickname-g3 and nickname-g4 be gateway node; Nickname-g1, nickname-g2 and nickname-g3 are the gateway of vlan1; Nickname-g2, nickname-g3 and nickname-g4 are the gateway of vlan2.
Nickname-g1, nickname-g2 and nickname-g3 are configured with three layer interfaces of vlan1, and each gateway node is configured with different real IP address and real MAC Address, each gateway node configures identical virtual IP address simultaneously: 1.1.1.1, and virtual MAC address: 1-1-1.In like manner, nickname-g2, nickname-g3 and nickname-g4 are configured with three layer interfaces of vlan2, and each gateway node is configured with different real IP address and real MAC Address, each gateway node configures identical virtual IP address simultaneously: 2.2.2.1, and virtual MAC address: 2-2-2.
In embodiments of the present invention, nickname-g1, nickname-g2, nickname-g3 and nickname-g4 are all configured with EGRP agreement.After enabling EGRP agreement, send EGRP protocol massages between each gateway node of same VLAN in VLAN, this protocol massages can adopt the send mode of broadcast in VLAN, carries out neighbor uni-cast and master election.
EGRP protocol massages can be periodically send, and sending interval can be arranged.When electing as gateway node (hereinafter referred to as the master) down of master, again between remaining gateway node, carry out neighbor uni-cast and new master elects.For Fig. 3, suppose that in vlan1, nickname-g1 becomes master, and in vlan2, nickname-g4 is master, and all the other gateway nodes are slave by election.
Ask in the handling process of the ARP of gateway at host, when host sends the ARP request of gateway time, only have master to be responsible for reply, slave does not process.Wherein, in embodiments of the present invention, the master outer layer MAC address of arp reply message of replying and sender MAC Address are virtual mac address.
Such as, suppose that host1.1.1.100 asks the ARP of 1.1.1.1, be responsible for replying response message by nickname-g1, response message is the common ARP message that non-Trill encapsulates, the sender MAC of outer MAC and internal layer is 1-1-1, and the form of this arp reply message can be as shown in table 1:
Table 1
In the handling process of the ARP of gateway requests host, each master uses respective real MAC Address as the source MAC of ARP request message, and does not use virtual mac address.For host, now the real MAC Address of gateway is equivalent to an other virtual host of same network segment.
Wherein, if due to the outbound port of the reason supports such as chip restriction not ARP be aggregation port, then gateway is to receive the outbound port of port as ARP of arp reply message; If chip supports that the outbound port of ARP is aggregation port, after then gateway receives arp reply message, the MAC address entries corresponding according to the source MAC inquiry of this ARP response message, if find corresponding MAC address entries, the outbound port of this MAC address entries of copy as the outbound port of ARP, thus, gateway node is existed to the occasion of equative route to this host, the outbound port of ARP can be aggregation port, can better share flow and back up.
In embodiments of the present invention, can be configured by order line, diffusion is carried out with synchronous by ESADI agreement in the virtual MAC address of vlan1 and vlan2, and final all nodes are all known.Wherein, virtual MAC address 1-1-1 belongs to nickname-g1, nickname-g2 and nickname-g3 simultaneously, and virtual MAC address 2-2-2 belongs to nickname-g2, nickname-g3 and nickname-g4 simultaneously.Wherein, because effect in the technical scheme that the real MAC Address of gateway node provides in the embodiment of the present invention is little, therefore, real MAC Address can be configured do not need to carry out diffusion and synchronously by ESADI protocol massages.
After in Trill territory, each RB receives ESADI protocol massages, for non-gateway node, in order to obtain the equative route arriving gateway node, need to calculate the singlecast router that this node arrives each gateway node in this VLAN (nickname-g1, nickname-g2 and nickname-g3 as in vlan1) respectively, and the path selecting cost minimum in these singlecast routers merges, and when there being many, then form equal-cost route.
After non-gateway node obtains the equative route arriving gateway node in VLAN, represent corresponding equative route with link aggregation, form final forwarding-table item, and be issued to hardware.Such as, in the scene shown in Fig. 3, the forwarding-table item that nickname-1 and nickname-4 generates can respectively as shown in table 2 and table 3:
Table 2
Vlan MAC Egress Port(outbound port)
vlan1 1-1-1 Trunk（P1，P2，P3）
Table 3
Vlan MAC Egress Port
vlan2 2-2-2 Trunk（P2，P3，P4）
In data retransmission flow process, for non-gateway node, after receiving the L3 data message of host transmission, Trill encapsulation is not carried out to this data message, and forward according to the forwarding-table item to hardware under control plane.Wherein, if outbound port is aggregation port, then corresponding to this aggregation port aggregated links carries out hash, and the port that certain sub-links of selective polymerization link is corresponding forwards this message.
For gateway node, in same VLAN, each gateway node receives the L3 data message of the host main frame transmission that non-gateway node forwards, and all thinks from as gateway, does not carry out Trill encapsulation, and carry out L3 forward process flow process to this data message.
For host1(IP address in vlan1 in scene shown in Fig. 3 for 1.1.1.100) to hsot2(IP address in vlan2 for 2.2.2.100) message repeating flow process.
As shown in Figure 4, be the schematic flow sheet of a kind of three layers of unicast message retransmission method that the embodiment of the present invention provides, can comprise the following steps:
Step 400, in vlan1, host1 is when needs send message to host2 in vlan2, finds host2 and self is not at the same network segment (namely host2 is at local network), so message is sent to gateway node.If the current ARP not having gateway node of host1, then broadcast transmission ARP request message, the IP of the target in this request message is the virtual IP address of gateway node.This ARP request message, through access node, is forwarded to gateway node.Wherein, after access node receives ARP request message, by the broadcast domain scope of the VLAN arranged, broadcast is carried out to this ARP request message and forward.
After gateway node receives above-mentioned ARP request message, if certainly as the master gateway node in corresponding VLAN, then return arp reply message to main frame clean culture, the sender IP in this response message is the virtual IP address of gateway node, and sender MAC Address is the virtual MAC address of gateway.This arp reply message is through access node, by the MAC address entries of access node according to target MAC (Media Access Control) address (i.e. the MAC Address of the main frame) match query of this arp reply message, be forwarded to main frame, thus main frame learns the ARP of gateway, set up the virtual IP address of gateway and associating between virtual MAC address.
Step 401, host1 send message to nickname-1, and the target MAC (Media Access Control) address of this message is the virtual MAC address 1-1-1 of gateway node, and object IP is the IP address 2.2.2.100 of host2.
Concrete, host1 sends message to host2, and search gateway A RP list item, the object MAC of encapsulation is 1-1-1, object IP is 2.2.2.100.
After step 402, nickname-1 receive message, search MAC according to the outer layer MAC address of this message and transmit, and forward the packet to nickname-g1 according to the list item inquired.
Concrete, after nickname-1 receives the message of host1 transmission, inquire about local mac according to the outer layer MAC address (1-1-1) of this message to transmit, list item shown in hit table 3, in this list item, outbound port is aggregation port (Trunk(P1, P2, P3)), nickname-1 chooses one of them by hash algorithm, is assumed to be port P1, and is sent from P1 by this message.Wherein, when this message forwards from P1 by nickname-1, Trill encapsulation can not be carried out to this message, but so that this message is sent with native form.
After step 403, nickname-g1 receive message, forward the packet to outer network router.
Concrete, after nickname-g1 receives the message of nickname-1 forwarding, be the virtual MAC address of self according to the target MAC (Media Access Control) address of this message of discovery, then think that this message sends to oneself, now need table of query and routing to carry out three layers of forwarding.During specific implementation, in advance specific sign can be set in the MAC forwarding-table item of virtual MAC address, such nickname-g1 inquires about local mac according to the target MAC (Media Access Control) address (1-1-1) of this message and transmits, according to the sign arranged in the MAC forwarding-table item inquired, determine to need to carry out L3 forwarding to this message.So table of query and routing, because this locality does not have direct-connected route, therefore, nickname-g1 forwards the packet to outer network router.Wherein, nickname-g1 does not also carry out Trill encapsulation to this message.
After step 404, outer network router receive message, according to the object IP address lookup routing table of message, forward the packet to nickname-g3.
Concrete, after outer network router receives the message of nickname-g1 forwarding, according to object IP address (2.2.2.100) table of query and routing of this message, be defined as equal-cost route, down hop is respectively nickname-g2, nickname-g3 and nickname-g4, and outer network router can pass through hash algorithm, therefrom selects one as actual down hop, suppose to be chosen to be nickname-g3, then outer network router forwards the packet to nickname-g3.Wherein, the message of this message non-Trill encapsulation not yet.
After step 405, nickname-g3 receive message, according to the local ARP table of the object IP address lookup of message, and forward the packet to nickname-4 according to the list item inquired.
Wherein, if nickname-g3 does not have host2(2.2.2.100) ARP, the real IP address/real MAC Address of self then can be used to initiate ARP request as source IP address/source MAC, to obtain the ARP information of host2, and forward the packet to nickname-4 according to the ARP information obtained, wherein, nickname-g3 sends to the message of nickname-4 to be non-Trill encapsulated message, and target MAC (Media Access Control) address is the target MAC (Media Access Control) address of host2.
After step 406, nickname-4 receive message, the target MAC (Media Access Control) address inquiry local mac according to message is transmitted, and forwards the packet to host2.
Further, in embodiments of the present invention, consider that large double layer network interior joint equipment or link exception may occur, in order to improve system availability, the embodiment of the present invention additionally provides exception handling.
Concrete, during TRILL link down between non-gateway node and gateway node, this non-gateway node can according to the topology after renewal, recalculate the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item;
This gateway node upgrades the outbound port of the ARP reaching All hosts under this non-gateway node.
When gateway node delays machine, the outgoing interface of the first mac address forwarding table item that the virtual MAC address that this gateway node of non-gateway node updates configures is corresponding.
When non-gateway node delays machine (down), gateway node deletes the ARP of the All hosts under this non-gateway node;
During primary gateway node down in VLAN, in this VLAN, other gateway nodes re-elect the primary gateway node in this VLAN;
When gateway node finds that outside router is unreachable, exit the election of the primary gateway node of this gateway node place VLAN, new primary gateway node is re-elected to trigger other gateway nodes, forbid self three all layer interface, and by described broadcast tree notice virtual MAC address cancel message, with the outgoing interface making non-gateway node device upgrade described first mac address forwarding table item corresponding to described virtual MAC address.
Still for the Trill technology in data center, the exception handling in the technical scheme provide the embodiment of the present invention is described in detail.
Scene one, Trill link failure
See Fig. 5, suppose the Trill link occurs fault between nickname-1 and nickname-g1, then need the network topology after determining this link failure with the node device (i.e. nickname1 and nickname-g1) of this Trill link direct correlation, and notice this network topology to other node devices, as ISIS protocol massages can be passed through to the network topology after other node device advertising link failure.
Each non-gateway node needs the topology after according to renewal, recalculates the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item.
Such as, in scene shown in Fig. 5, to in the path of virtual MAC address 1-1-1, in the path that three cost that port P1, P2, P3 are corresponding are minimum, because detouring has appearred in the path that port P1 is corresponding, cost strengthens, be left out, the path that two cost that therefore only remaining port P2 and P3 is corresponding are minimum, therefore, the upper outbound port to virtual MAC address 1-1-1 of nickname-1 refreshes as new aggregation port, and it is table 5 that corresponding list item is refreshed by table 4:
Table 4
VLAN MAC Egress port
vlan1 1-1-1 Trunk（P1、P2、P3）
Table 5
VLAN MAC Egress port
vlan1 1-1-1 Trunk（P2、P3）
Meanwhile, nickname-g1 node updates arrives the outbound port of the ARP of the All hosts under nickname-1, to detour path as being updated to port P2(from port P1).
Scene two, access node failure
See Fig. 6, suppose nickname-1down, then the node device be associated with nickname-1 needs the network topology after determining this node device fault, and notices this network topology to other node devices.
Each gateway node deletes the ARP of the All hosts under nickname-1.
Scene three, core node failure
See Fig. 7, the master supposed in nickname-g1(vlan1) down, then other gateway nodes need to re-elect new master(according to EGRP agreement and are assumed to be nickname-g2 in vlan1), the virtual MAC address 1-1-1 noticed by ESADI protocol massages before the nickname-g1 of down is aging in the process of follow-up ESADI synchronized update.Each node device refreshes the new outbound port of virtual MAC address 1-1-1.Such as, the outbound port of nickname-1 to 1-1-1 is the aggregation port of P2 and P3 composition, and port P1 is deleted.
Scene four, up link (link between gateway node and outside router) fault
See Fig. 8, suppose the link down between nickname-g1 and external routes, then nickname-g1 finds that outside router is unreachable, down falls three layer interfaces on self all vlan, and the virtual MAC address information of this node issue is cancelled by ESADI protocol massages, recalculate the path of the virtual MAC address arriving the configuration of this gateway node to make each non-gateway node, upgrade the outbound port of the first mac address forwarding table item corresponding to this virtual MAC address.Meanwhile, nickname-g1 exits the EGRP election of place VLAN, and all the other gateway nodes re-elect new master, each non-gateway node
Such as, in the scene shown in Fig. 8, after re-electing, nickname-g2 is the outbound port of new master, nickname-1 arrival virtual MAC address 1-1-1 is the aggregation port only comprising port P2 and P3, and port P1 is deleted.
Should be realized that, above-described embodiment has been described in detail message repeating technical scheme provided by the invention for the Trill technology in data center, when during relative theory is applied to other large two layers of networking technologys (as Vxlan technology, SPB technology) etc., corresponding description also should adjust.
Such as, for the access layer equipment in large double layer network and core layer equipment, in Trill technology, access layer equipment and core layer equipment are RB; And in Vxlan technology, access layer equipment is VTEP(Vxlan Tunnel Endpoint, Vxlan endpoint of a tunnel), and to core layer equipment not special definition; And in SPB technology, access layer equipment is BEB(Backbone Edge Bridge, backbone edge bridge) equipment, nucleus equipment is BCB(Backbone Core Bridge, Back Bone Core Bridges) equipment.
Transmit for large double layer network, in Trill technology, this large double layer network is transmitted and is specially Trill routing table; And in Vxlan technology, this large double layer network transmits the backbone network L3 routing table be specially in Vxlan; And in SPB technology, the Bmac that this large double layer network transmits the backbone network be specially in SPBM transmits.
For for carrying out the synchronous control message of MAC Address, in Trill technology, this control message being used for carrying out MAC Address synchronous is specially ESADI protocol massages; And in Vxlan technology and SPB technology, due to it and the MAC Address synchronization mechanism of undefined active, therefore, the ESADI protocol massages in Trill technology can be used in Vxlan technology and SPB technology, its specific implementation does not repeat them here.
Based on identical technical conceive, the embodiment of the present invention additionally provides the equipment in above-mentioned large double layer network.
See Fig. 9, for the structural representation of a kind of network equipment that the embodiment of the present invention provides, this network equipment can be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, the described network equipment is applied in described large double layer network as non-gateway node, and this network equipment comprises:
Address management module 91, for can reach the broadcast tree of all node devices in described large double layer network by one, receives the virtual MAC address of this gateway node configuration that each gateway node is noticed and affiliated vlan information;
List item maintenance module 92, for the large double layer network mark of each gateway node corresponding to the same virtual MAC address received according to large double layer network agreement and described address management module 91, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, the outgoing interface that the route that the VLAN in described first mac address forwarding table item VLAN, target MAC (Media Access Control) address belonging to described virtual MAC are described virtual MAC address, outgoing interface is Least-cost in described singlecast router is corresponding;
Packet forwarding module 93, when being the data message of virtual MAC address of a gateway node for receiving target MAC (Media Access Control) address when the described network equipment, according to the target MAC (Media Access Control) address of this data message, search the first mac address forwarding table item of coupling, and according to the coupling list item found, directly forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, described list item maintenance module 92 also can be used for,
During link down between the described network equipment and gateway node, according to the topology after renewal, recalculate the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item;
When gateway node delays machine, upgrade the outgoing interface of the first mac address forwarding table item corresponding to virtual MAC address of this gateway node configuration.
As shown in Figure 10, for the structural representation of the another kind of network equipment that the embodiment of the present invention provides, this network equipment can be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, the described network equipment is applied in described large double layer network as gateway node, and this network equipment comprises:
Address management module 101, for can reach the broadcast tree of all node devices in described large double layer network by one, notice the virtual MAC address of this node device configuration and affiliated vlan information, to make non-gateway node device according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, VLAN in described first mac address forwarding table item VLAN belonging to described virtual MAC, target MAC (Media Access Control) address is described virtual MAC address, outgoing interface is outgoing interface corresponding to the route of Least-cost in described singlecast router,
Packet forwarding module 102, for receiving when the described network equipment data message that target MAC (Media Access Control) address is self virtual MAC address, and when judging the target MAC (Media Access Control) address of described data message for self virtual MAC address, according to the object IP address of described data message, search routing table and forward described data message; Wherein, described data message is the target MAC (Media Access Control) address of non-gateway node according to message, mates that described first mac address forwarding table item directly forwards afterwards and does not carry out large double layer network protocol encapsulation.
Wherein, this network equipment also comprises: list item maintenance module 103;
Described address management module 101 also can be used for, and receives from described broadcast tree the local mac address and affiliated VLAN that described in the notice of other node devices, other node devices newly learn; Described local mac address comprises the MAC Address learnt from the user network side of described other node devices connection;
List item maintenance module 103, for basis in advance based on the large double layer network forwarding-table item of this large double layer network protocol generation, generate the second mac address forwarding table item that the local mac address of other node devices described is corresponding, target MAC (Media Access Control) address in described second mac address forwarding table item is the local mac address of other node devices described, and outgoing interface is the outgoing interface going to other node devices described in described large double layer network forwarding-table item;
Described packet forwarding module 102 also can be used for, after when the described network equipment, to receive target MAC (Media Access Control) address be not the unicast data message of self port mac address or described virtual MAC address, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described second mac address forwarding table item, and directly forward described unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
Wherein, the described network equipment is also connected with the routing device of described large double layer network outside;
In described large double layer network, each node device is provided with the broadcast domain scope of VLAN, wherein, described broadcast domain scope comprises user-side port and the large double layer network side interface be positioned on this VLAN cutting tree on this node device that this node device allows this VLAN to pass through, and described cutting tree obtains the beta pruning that described broadcast tree carries out distribution tree based on VLAN;
Described packet forwarding module 102 also can be used for, when receiving the data message that described routing device sends, search the ARP of the object IP address of mating described data message, and according to the target MAC (Media Access Control) address of the ARP found and outgoing interface, directly forward described data message and do not carry out large double layer network protocol encapsulation.
Wherein, described packet forwarding module 102 also can be used for, if do not find the ARP of the object IP address of mating described data message, in the broadcast domain of VLAN corresponding to this data message, direct broadcast transmission does not carry out large double layer network protocol encapsulation for asking an ARP request message of MAC Address corresponding to the object IP address of described data message, the transmitting terminal sender IP address of a described ARP request message is the transmit port IP address of the described network equipment, source MAC and transmitting terminal MAC Address are the transmit port MAC Address of the described network equipment,
Described list item maintenance module 103 also can be used for, and when the described network equipment receives the first arp reply message according to receiving for an ARP request message, sets up the ARP that the object IP address of described data message is corresponding;
Described packet forwarding module 102 also can be used for, and according to the ARP that described list item maintenance module is set up, forwards described data message and does not carry out large double layer network protocol encapsulation.
Wherein, a gateway node in same VLAN is elected as the primary gateway node of this VLAN,
Described packet forwarding module 102 also can be used for, when receiving the 2nd ARP request message of the MAC Address for asking gateway node that main frame sends, and when determining that the described network equipment is the primary gateway node of corresponding VLAN, generate the second arp reply message, the target MAC (Media Access Control) address of this second arp reply message is the MAC Address of described main frame, source MAC and transmitting terminal sender MAC Address are the virtual MAC address of the described network equipment, sender IP address is the virtual IP address of the described network equipment, learn to make described main frame and set up the incidence relation between the virtual IP address of the described network equipment and virtual MAC address, according to the target MAC (Media Access Control) address of described arp reply message, mate in the second mac address forwarding table item, and directly forward described arp reply message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation
Wherein, the described network equipment also comprises:
Election module 104, carries self port IP address of the described network equipment, port mac address, the neighbor uni-cast of empty IP and virtual MAC address and primary gateway node voting protocol message for broadcast in the VLAN belonging to the described network equipment; Receive the described protocol massages that in described VLAN, other gateway nodes send, election port IP address and/or port mac address meet the gateway node of preset rules, as described primary gateway node.
Wherein, described list item maintenance module 103 also can be used for, and during link down between non-gateway node and the described network equipment, upgrades the outgoing interface of the ARP reaching All hosts under this non-gateway node; When non-gateway node delays machine down, delete the ARP of the All hosts under this non-gateway node;
Described address management module 101 also can be used for, when the described network equipment finds that outside router is unreachable, forbid self three all layer interface, and by described broadcast tree notice virtual MAC address cancel message, with the outgoing interface making non-gateway node device upgrade described first mac address forwarding table item corresponding to described virtual MAC address;
Described election module 104 also can be used for, and when the described network equipment finds that outside router is unreachable, exits the election of the primary gateway node of this gateway node place VLAN, re-elects primary gateway node to trigger other gateway nodes.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.

Claims (18)

1. a message forwarding method, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, it is characterized in that, described multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, and the method comprises:
Non-gateway node can reach the broadcast tree of all node devices in described large double layer network by one, receives the virtual MAC address of this gateway node configuration that each gateway node is noticed and affiliated vlan information;
Non-gateway node is according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, the outgoing interface that the route that the VLAN in described first mac address forwarding table item VLAN, target MAC (Media Access Control) address belonging to described virtual MAC are described virtual MAC address, outgoing interface is Least-cost in described singlecast router is corresponding;
Non-gateway node receives target MAC (Media Access Control) address when being the data message of virtual MAC address of a gateway node, according to the target MAC (Media Access Control) address of this data message, search the first mac address forwarding table item of coupling, and according to the coupling list item found, directly forward described data message and do not carry out large double layer network protocol encapsulation.
2. the method for claim 1, is characterized in that, the method also comprises:
During link down between non-gateway node and gateway node, non-gateway node is according to the topology after renewal, recalculate the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item;
When gateway node delays machine, the outgoing interface of the first mac address forwarding table item that the virtual MAC address that this gateway node of non-gateway node updates configures is corresponding.
3. a message forwarding method, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, it is characterized in that, described multiple node device comprises the gateway node as gateway node and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, and the method comprises:
Gateway node can reach the broadcast tree of all node devices in described large double layer network by one, notice the virtual MAC address of this node device configuration and affiliated vlan information, to make non-gateway node device according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, VLAN in described first mac address forwarding table item VLAN belonging to described virtual MAC, target MAC (Media Access Control) address is described virtual MAC address, outgoing interface is outgoing interface corresponding to the route of Least-cost in described singlecast router,
Gateway node receives the data message that target MAC (Media Access Control) address is self virtual MAC address, described data message is the target MAC (Media Access Control) address of non-gateway node according to message, mates that described first mac address forwarding table item directly forwards afterwards and does not carry out large double layer network protocol encapsulation;
Described gateway node, when judging the target MAC (Media Access Control) address of described data message for self virtual MAC address, according to the object IP address of described data message, is searched routing table and is forwarded described data message.
4. method as claimed in claim 3, it is characterized in that, the method also comprises:
Each node device is set by described broadcast, and the local mac address newly learnt and affiliated VLAN are advertised to other node devices, and described local mac address comprises the MAC Address that the user network side that connects from this node device learns;
Gateway node receives from described broadcast tree the local mac address and affiliated VLAN that described in the notice of other node devices, other node devices newly learn, and according to the large double layer network forwarding-table item in advance based on this large double layer network protocol generation, generate the second mac address forwarding table item that the local mac address of other node devices described is corresponding, target MAC (Media Access Control) address in described second mac address forwarding table item is the local mac address of other node devices described, and outgoing interface is the outgoing interface going to other nodes described in described large double layer network forwarding-table item;
It is not after the unicast data message of self port mac address or described virtual MAC address that described gateway node receives target MAC (Media Access Control) address, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described second mac address forwarding table item, and directly forward described unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
5. method as claimed in claim 4, is characterized in that,
Described gateway node is also connected with the routing device of described large double layer network outside;
Each node device arranges the broadcast domain scope of VLAN, wherein, described broadcast domain scope comprises user-side port and the large double layer network side interface be positioned on this VLAN cutting tree on this node device that this node device allows this VLAN to pass through, and described cutting tree obtains the beta pruning that described broadcast tree carries out distribution tree based on VLAN;
Gateway node is when receiving the data message that described routing device sends, search the ARP of the object IP address of mating described data message, and according to the target MAC (Media Access Control) address of the ARP found and outgoing interface, directly forward described data message and do not carry out large double layer network protocol encapsulation.
6. method as claimed in claim 5, is characterized in that,
If gateway node does not find the ARP of the object IP address of mating described data message, described method also comprises:
Described gateway node is in the broadcast domain of VLAN corresponding to this data message, direct broadcast transmission does not carry out large double layer network protocol encapsulation for asking an ARP request message of MAC Address corresponding to the object IP address of described data message, the transmitting terminal sender IP address of a described ARP request message is the transmit port IP address of described gateway node, and source MAC and transmitting terminal MAC Address are the transmit port MAC Address of described gateway node;
Described gateway node is according to the first arp reply message for an ARP request message received, set up the ARP that the object IP address of described data message is corresponding, and according to the ARP of this foundation, forward described data message and do not carry out large double layer network protocol encapsulation.
7. method as claimed in claim 4, it is characterized in that, a gateway node in same VLAN is elected as the primary gateway node of this VLAN, and the method also comprises:
Gateway node receives the 2nd ARP request message of the MAC Address for asking gateway node that main frame sends, and when determining the primary gateway node certainly as corresponding VLAN, generate the second arp reply message, the target MAC (Media Access Control) address of this second arp reply message is the MAC Address of described main frame, source MAC and transmitting terminal sender MAC Address are the virtual MAC address of described gateway node, sender IP address is the virtual IP address of described gateway node, learns and set up the incidence relation between the virtual IP address of described gateway node and virtual MAC address to make described main frame;
Described gateway node, according to the target MAC (Media Access Control) address of described arp reply message, mates in the second mac address forwarding table item, and is directly forwarded described arp reply message by the outgoing interface of coupling list item and do not carried out large double layer network protocol encapsulation.
8. method as claimed in claim 7, it is characterized in that, the election of described primary gateway node comprises:
Each gateway node in same VLAN is broadcasted and is carried respective port IP address, port mac address, the neighbor uni-cast of empty IP and virtual MAC address and primary gateway node voting protocol message in this VLAN;
Each gateway node in same VLAN receives the described protocol massages that other gateway nodes send, and election port IP address and/or port mac address meet the gateway node of preset rules, as described primary gateway node.
9. method as claimed in claim 3, is characterized in that, also comprise:
During link down between non-gateway node and gateway node, this gateway node upgrades the outgoing interface of the ARP reaching All hosts under this non-gateway node;
When non-gateway node delays machine down, gateway node deletes the ARP of the All hosts under this non-gateway node;
During primary gateway node down in VLAN, in this VLAN, other gateway nodes re-elect the primary gateway node in this VLAN;
Gateway node is when finding that outside router is unreachable, exit the election of the primary gateway node of this gateway node place VLAN, primary gateway node is re-elected to trigger other gateway nodes, forbid self three all layer interface, and by described broadcast tree notice virtual MAC address cancel message, with the outgoing interface making non-gateway node device upgrade described first mac address forwarding table item corresponding to described virtual MAC address.
10. a network equipment, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, it is characterized in that, described multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, the described network equipment is applied in described large double layer network as non-gateway node, and this network equipment comprises:
Address management module, for can reach the broadcast tree of all node devices in described large double layer network by one, receives the virtual MAC address of this gateway node configuration that each gateway node is noticed and affiliated vlan information;
List item maintenance module, for the large double layer network mark of each gateway node corresponding to the same virtual MAC address received according to large double layer network agreement and described address management module, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, the outgoing interface that the route that the VLAN in described first mac address forwarding table item VLAN, target MAC (Media Access Control) address belonging to described virtual MAC are described virtual MAC address, outgoing interface is Least-cost in described singlecast router is corresponding;
Packet forwarding module, when being the data message of virtual MAC address of a gateway node for receiving target MAC (Media Access Control) address when the described network equipment, according to the target MAC (Media Access Control) address of this data message, search the first mac address forwarding table item of coupling, and according to the coupling list item found, directly forward described data message and do not carry out large double layer network protocol encapsulation.
11. network equipments as claimed in claim 10, is characterized in that, described list item maintenance module also for,
During link down between the described network equipment and gateway node, according to the topology after renewal, recalculate the singlecast router of each gateway node going to same VLAN, and the singlecast router obtained is recalculated in renewal, upgrades the outgoing interface of the first mac address forwarding table item;
When gateway node delays machine, upgrade the outgoing interface of the first mac address forwarding table item corresponding to virtual MAC address of this gateway node configuration.
12. 1 kinds of network equipments, be applied in the large double layer network that multiple node device sets up based on large double layer network agreement, it is characterized in that, described multiple node device comprises the gateway node as gateway device and the non-gateway node as access device, each gateway node of same VLAN is configured with identical virtual IP address and virtual MAC address, the described network equipment is applied in described large double layer network as gateway node, and this network equipment comprises:
Address management module, for can reach the broadcast tree of all node devices in described large double layer network by one, notice the virtual MAC address of this node device configuration and affiliated vlan information, to make non-gateway node device according to the large double layer network mark of each gateway node corresponding to large double layer network agreement and the same virtual MAC address that receives, calculate the singlecast router going to each gateway node of same VLAN, and then generate the first mac address forwarding table item corresponding to described virtual MAC address, wherein, VLAN in described first mac address forwarding table item VLAN belonging to described virtual MAC, target MAC (Media Access Control) address is described virtual MAC address, outgoing interface is outgoing interface corresponding to the route of Least-cost in described singlecast router,
Packet forwarding module, for receiving when the described network equipment data message that target MAC (Media Access Control) address is self virtual MAC address, and when judging the target MAC (Media Access Control) address of described data message for self virtual MAC address, according to the object IP address of described data message, search routing table and forward described data message; Wherein, described data message is the target MAC (Media Access Control) address of non-gateway node according to message, mates that described first mac address forwarding table item directly forwards afterwards and does not carry out large double layer network protocol encapsulation.
13. methods as claimed in claim 12, it is characterized in that, this network equipment also comprises: list item maintenance module;
Described address management module also for, receive the local mac address that newly learns of other node devices and affiliated VLAN described in the notice of other node devices from described broadcast tree; Described local mac address comprises the MAC Address learnt from the user network side of described other node devices connection;
List item maintenance module, for basis in advance based on the large double layer network forwarding-table item of this large double layer network protocol generation, generate the second mac address forwarding table item that the local mac address of other node devices described is corresponding, target MAC (Media Access Control) address in described second mac address forwarding table item is the local mac address of other node devices described, and outgoing interface is the outgoing interface going to other node devices described in described large double layer network forwarding-table item;
Described packet forwarding module also for, after when the described network equipment, to receive target MAC (Media Access Control) address be not the unicast data message of self port mac address or described virtual MAC address, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described second mac address forwarding table item, and directly forward described unicast data message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
14. network equipments as claimed in claim 13, is characterized in that, the described network equipment is also connected with the routing device of described large double layer network outside;
In described large double layer network, each node device is provided with the broadcast domain scope of VLAN, wherein, described broadcast domain scope comprises user-side port and the large double layer network side interface be positioned on this VLAN cutting tree on this node device that this node device allows this VLAN to pass through, and described cutting tree obtains the beta pruning that described broadcast tree carries out distribution tree based on VLAN;
Described packet forwarding module also for, when receiving the data message that described routing device sends, search the ARP of the object IP address of mating described data message, and according to the target MAC (Media Access Control) address of the ARP found and outgoing interface, directly forward described data message and do not carry out large double layer network protocol encapsulation.
15. network equipments as claimed in claim 14, is characterized in that,
Described packet forwarding module also for, if do not find the ARP of the object IP address of mating described data message, in the broadcast domain of VLAN corresponding to this data message, direct broadcast transmission does not carry out large double layer network protocol encapsulation for asking an ARP request message of MAC Address corresponding to the object IP address of described data message, the transmitting terminal sender IP address of a described ARP request message is the transmit port IP address of the described network equipment, and source MAC and transmitting terminal MAC Address are the transmit port MAC Address of the described network equipment;
Described list item maintenance module also for, when the described network equipment receives the first arp reply message according to receiving for an ARP request message, set up the ARP that the object IP address of described data message is corresponding;
Described packet forwarding module also for, according to the ARP that described list item maintenance module is set up, forward described data message and do not carry out large double layer network protocol encapsulation.
16. network equipments as claimed in claim 13, is characterized in that, a gateway node in same VLAN is elected as the primary gateway node of this VLAN,
Described packet forwarding module also for, when receiving the 2nd ARP request message of the MAC Address for asking gateway node that main frame sends, and when determining that the described network equipment is the primary gateway node of corresponding VLAN, generate the second arp reply message, the target MAC (Media Access Control) address of this second arp reply message is the MAC Address of described main frame, source MAC and transmitting terminal sender MAC Address are the virtual MAC address of the described network equipment, sender IP address is the virtual IP address of the described network equipment, learn to make described main frame and set up the incidence relation between the virtual IP address of the described network equipment and virtual MAC address, according to the target MAC (Media Access Control) address of described arp reply message, mate in the second mac address forwarding table item, and directly forward described arp reply message by the outgoing interface of coupling list item and do not carry out large double layer network protocol encapsulation.
17. network equipments as claimed in claim 16, it is characterized in that, the described network equipment also comprises:
Election module, carries self port IP address of the described network equipment, port mac address, the neighbor uni-cast of empty IP and virtual MAC address and primary gateway node voting protocol message for broadcast in the VLAN belonging to the described network equipment; Receive the described protocol massages that in described VLAN, other gateway nodes send, election port IP address and/or port mac address meet the gateway node of preset rules, as described primary gateway node.
18. network equipments as claimed in claim 17, is characterized in that,
Described list item maintenance module also for, during link down between non-gateway node and the described network equipment, upgrade the outgoing interface of the ARP reaching All hosts under this non-gateway node; When non-gateway node delays machine down, delete the ARP of the All hosts under this non-gateway node;
Described address management module also for, when the described network equipment finds that outside router is unreachable, forbid self three all layer interface, and by described broadcast tree notice virtual MAC address cancel message, with the outgoing interface making non-gateway node device upgrade described first mac address forwarding table item corresponding to described virtual MAC address;
Described election module also for, when the described network equipment finds that outside router is unreachable, exit the election of the primary gateway node of this gateway node place VLAN, re-elect primary gateway node to trigger other gateway nodes.
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