CN104378296A

CN104378296A - Message forwarding method and device

Info

Publication number: CN104378296A
Application number: CN201310357090.5A
Authority: CN
Inventors: 宋玉兵
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2013-08-15
Filing date: 2013-08-15
Publication date: 2015-02-25
Anticipated expiration: 2033-08-15
Also published as: CN104378296B

Abstract

The invention discloses a message forwarding method and device. The method includes the steps that all node devices annunciate newly-learnt local MAC addresses and a WLAN which the MAC addresses belong to towards other node devices on the control surface of a large layer-2 network through a broadcast tree which can reach all the node devices in the large layer-2 network; the node devices receive the local MAC addresses, annunciated by other node devices, of other node devices from the broadcast tree, and original MAC address forwarding table items are generated according to large layer-2 network forwarding table items generated based on a large layer-2 network protocol in advance; after the node devices receive unicast data messages on the data plane of the large layer-2 network, matching is carried out in the original MAC address forwarding table items according to the destination MAC addresses of the unicast data messages and the WLAN which the MAC addresses belong to, outcoming interfaces of the matched table items are used for forwarding the unicast data messages directly instead of conducting large layer-2 network protocol packaging. According to the message forwarding method and device, L2 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 AccessControl 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 Lotsof 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, L2 clean culture/broadcast traffic forwards after needing to carry out the encapsulation of large two-layer protocol, it is higher to chip requirement when large two layers of networking technology and other technologies coexist networking, during as 802.1Br technology and the networking of Trill technology co-existence, when message enters Trill network from 802.1Br encapsulation, need the E-tag encapsulation first removing 802.1Br, then change Trill encapsulation into; When oppositely entering 802.1Br network from Trill network, need to remove Trill encapsulation, then change E-tag encapsulation into.Current commercial chip support is not an above flow process of pipeline process, namely in a pipeline, E-tag encapsulation (Trill encapsulation) cannot first be removed to message, change the flow process of Trill encapsulation (E-tag encapsulation) again into, limit the actual deployment of the technology such as Trill/802.1Br.

In prior art, when large two layers of networking technology and other technologies coexist networking, be typically employed in the mode of She Ge winding mouth Shang chip, the flow adding/deleted a kind of encapsulation sent into chip again through winding mouth and carries out aftertreatment, add/delete another encapsulation.Wherein, when 802.1Br technology and the networking of Trill technology co-existence, handling process can be as shown in Figure 1.

In prior art, large two layers of networking technology and other technologies coexist networking time processing mode, need E Wai Pei Ge winding mouth, waste device port, simultaneously winding mouth becomes the forwarding bottleneck of system, and performance is low, postpones large.

Summary of the invention

The embodiment of the present invention provides a kind of message forwarding method and equipment, forwards L2 clean culture/broadcast traffic in order to make large two-layer network device.

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, the method comprises:

Each node device can reach the broadcast tree of all node devices in described large double layer network by one, the local mac address newly learnt and affiliated VLAN are advertised to other node devices, and described local mac address comprises the MAC Address learnt from the user network side of this equipment connection;

Described node device receives after the first MAC Address and an affiliated VLAN that described in the notice of other node devices, other node devices newly learn from described broadcast tree, according to the large double layer network mark of other node devices described, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determine the outgoing interface that other node devices described are corresponding, and then generate original MAC address forwarding-table item corresponding to described first MAC Address, wherein, VLAN in described original MAC address forwarding-table item is a described VLAN, target MAC (Media Access Control) address is described first MAC Address, outgoing interface is the outgoing interface that other node devices described are corresponding,

After described node device receives unicast data message, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described original 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 large double layer network mark of other node devices described in described basis, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determines to comprise the outgoing interface that other node devices described are corresponding:

Be designated destination node equipment with the large double layer network of other node devices described, from described large double layer network is transmitted, find the forwarding-table item that the large double layer network mark of other node devices described is corresponding;

If only comprise an outgoing interface in the forwarding-table item found, then the outgoing interface will found, as the outgoing interface that other node devices described 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 described.

Wherein, the described outgoing interface by coupling list item directly forwards described unicast data message and does not carry out large double layer network protocol encapsulation, comprising:

If the outgoing interface of coupling list item is aggregation port, then by a member port of aggregation port described in HASH algorithms selection, and by selected member port, directly forwards described unicast data message and do not carry out large double layer network protocol encapsulation.

Wherein, also comprise:

The aging local mac address of generation and affiliated VLAN also by described broadcast tree, are advertised to other node devices by each node device;

Node device receives other node devices described in the notice of other node devices from described broadcast tree and the second aging MAC Address and affiliated VLAN occurs, and from described original MAC address forwarding-table item, delete described second MAC Address and the forwarding-table item corresponding to affiliated VLAN.

Wherein, each node device, for the combination of self different interface and VLAN, joins the MAC Address pond that Ge mono-is corresponding respectively, for be maintained in study on this corresponding interface to the local mac address belonging to corresponding VLAN;

Each node device is when new study is to local mac address, 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, and, after one section of aging Preset Time occurs local mac address, aging local mac address is deleted from corresponding MAC Address pond;

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.

Wherein, the method also comprises:

The broadcast domain scope of She Ge VLAN Shang node device, 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;

After node device receives data message to be broadcast, determine VLAN belonging to described data message to be broadcast, and on other ports except receiving port included by the broadcast domain scope of this VLAN, the described data message to be broadcast of direct forwarding and do not carry out large double layer network protocol encapsulation, wherein, described data message to be broadcast comprises unknown unicast message, broadcasting data messages and unknown multicast packets.

Wherein, in the network topology change of described large double layer network, cause large double layer network to be transmitted and/or VLAN cutting tree upgrade after, the method also comprises:

When the outgoing interface of the forwarding-table item of described node device in large double layer network is transmitted occurs to upgrade, upgrade the outgoing interface of corresponding original MAC address forwarding-table item;

When the forwarding-table item of described node device in large double layer network is transmitted is deleted, determine the destination node equipment of deleted forwarding-table item and belong to the local mac address of this destination node equipment, and then the original MAC address forwarding-table item that the local mac address deleting this destination node equipment is corresponding;

Described node device, after VLAN cutting tree upgrades, is set according to the VLAN cutting after upgrading, the broadcast domain scope of the corresponding VLAN of Chong Xin She Ge.

The embodiment of the present invention additionally provides a kind of large two-layer network device, and be applied to as node device the large double layer network that multiple node device sets up based on large double layer network agreement, this large two-layer network device comprises:

Address management module, for can reach the broadcast tree of all node devices in described large double layer network by one, the local mac address newly learn described large two-layer network device and affiliated VLAN are advertised to other node devices, and described local mac address comprises the MAC Address learnt from the user network side of this equipment connection;

List item maintenance module, for to receive from described broadcast tree at described large two-layer network device other node devices notice described in after the first MAC Address of newly learning of other node devices and an affiliated VLAN, according to the large double layer network mark of other node devices described, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determine the outgoing interface that other node devices described are corresponding, and then generate original MAC address forwarding-table item corresponding to described first MAC Address, wherein, VLAN in described original MAC address forwarding-table item is a described VLAN, target MAC (Media Access Control) address is described first MAC Address, outgoing interface is the outgoing interface that other node devices described are corresponding,

Packet forwarding module, for after described large two-layer network device receives unicast data message, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described original 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 list item maintenance module specifically for, realize the large double layer network mark according to other node devices described in the following manner, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determines the outgoing interface that other node devices described are corresponding:

Wherein, described packet forwarding module specifically for, realize in the following manner by mating the outgoing interface of list item and directly forwarding described unicast data message and do not carry out large double layer network protocol encapsulation:

Wherein, described address management module also for, by described broadcast tree, the aging local mac address of generation and affiliated VLAN are advertised to other node devices;

Described list item maintenance module also for, receive other node devices described in the notice of other node devices from described broadcast tree and the second aging MAC Address and affiliated VLAN occur, and from described original MAC address forwarding-table item, delete described second MAC Address and the forwarding-table item corresponding to affiliated VLAN.

Wherein, this large two-layer network device, for the combination of self different interface and VLAN, joins the MAC Address pond that Ge mono-is corresponding respectively, for be maintained in study on this corresponding interface to the local mac address belonging to corresponding VLAN;

Described address management module specifically for, when new study is to local mac address, 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, and, after one section of aging Preset Time occurs local mac address, aging local mac address is deleted from corresponding MAC Address pond; Add when newly learning the local mac address arrived in MAC Address pond, by described broadcast tree, the local mac address newly learnt and affiliated VLAN are 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.

Wherein, described packet forwarding module also for,

After receiving data message to be broadcast, determine VLAN belonging to described data message to be broadcast, and on other ports except receiving port included by the broadcast domain scope of this VLAN, the described data message to be broadcast of direct forwarding and do not carry out large double layer network protocol encapsulation, wherein, described data message to be broadcast comprises unknown unicast message, broadcasting data messages and unknown multicast packets.

Wherein, described list item maintenance module also for, in the network topology change of described large double layer network, after causing large double layer network to be transmitted upgrading, if large double layer network transmit in the outgoing interface of forwarding-table item upgrade, upgrade the outgoing interface of the original MAC address forwarding-table item of correspondence; If large double layer network transmit in forwarding-table item deleted, determine the destination node equipment of deleted forwarding-table item and belong to the local mac address of this destination node equipment, and then the original MAC address forwarding-table item that the local mac address deleting this destination node equipment is corresponding;

Described packet forwarding module also for, in the network topology change of described large double layer network, after causing VLAN cutting to be set upgrading, according to the VLAN cutting tree after upgrading, the broadcast domain scope of the corresponding VLAN of Chong Xin She Ge.

In the above embodiment of the present invention, each node device can reach the broadcast tree of all node devices in described large double layer network by one, and the local mac address newly learnt and affiliated VLAN are advertised to other node devices; Described node device receives after the first MAC Address and an affiliated VLAN that described in the notice of other node devices, other node devices newly learn from described broadcast tree, according to the large double layer network mark of other node devices described, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determine the outgoing interface that other node devices described are corresponding, and then generate original MAC address forwarding-table item corresponding to described first MAC Address; After described node device receives unicast data message, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described original 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, the L2 unicast traffic achieved based on large double layer network forwards, and, when L2 unicast traffic forwards in large double layer network, without the need to carrying out large double layer network protocol encapsulation.

Accompanying drawing explanation

Handling process schematic diagram when Fig. 1 is 802.1Br technology and the networking of Trill technology co-existence in prior art;

The configuration diagram of a kind of Trill networking that Fig. 2 provides for the embodiment of the present invention;

The schematic diagram of VLAN broadcast domain in a kind of Trill networking that Fig. 3 provides for the embodiment of the present invention;

The schematic flow sheet of a kind of two layers of unicast message retransmission method that Fig. 4 provides for the embodiment of the present invention;

The schematic diagram of a kind of Trill networking link fault that Fig. 5 provides for the embodiment of the present invention;

The schematic diagram of a kind of Trill networking interior joint equipment fault that Fig. 6 provides for the embodiment of the present invention;

The structural representation of a kind of large two-layer network device that Fig. 7 provides for the embodiment of the present invention.

Embodiment

In the message repeating technology that the embodiment of the present invention provides, 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, and the VLAN belonging to the local mac address newly learnt and this MAC Address 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 according to the large double layer network forwarding-table item in advance based on this large double layer network protocol generation, generates original MAC address forwarding-table item; At the datum plane of large double layer network, after node device receives unicast data message, 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.

Wherein, the local mac address of node device comprises the MAC Address that this node device learns from the user network side that this node device connects; The target MAC (Media Access Control) address of the original MAC address forwarding-table item of node device is the local mac address of other node devices above-mentioned, and outgoing interface is the outgoing interface going to these other node devices in above-mentioned large double layer network forwarding-table item.

Concrete, in embodiments of the present invention, as the first MAC Address that these other node devices that any node equipment in large double layer network 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 (ECMP).

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.

Further, in embodiments of the present invention, 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, join the MAC Address pond of Ge mono-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.

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 is by running the topology in the cognitive Trill territory of link-state protocol, and use shortest path tree algorithm to generate the nickname route forwarding table (referred to as Trill routing table, comprising nickname unicast routing table and multicast 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 Trill routing table of generation only retains at control plane, and does not issue data retransmission plane (namely 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, can generate the broadcast tree of a Trill on the control plane 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, for MAC Address automatic learning (hardware study source MAC), the list item of its study might not be correct list item on the one hand, easy formation loop and cause broadcast storm, on the other hand, in MAC Address automatic learning process, message not necessarily can transmitted to CPU, causes corresponding MAC Address to be synchronized to remote equipment by ESADI protocol massages.

Such as, the source MAC of a message is 0-0-1, and target MAC (Media Access Control) address is 0-0-2, if do not forbid MAC Address automatic learning, after RB receives this message from port1, searches MAC table, finds to there is list item corresponding to 0-0-2, point to port2.If do not forbid MAC Address automatic learning, the hardware of RB is by the corresponding relation of automatic learning source MAC and receiving port, directly add the MAC forwarding-table item of 0-0-1->port1, then message is directly forwarded by port2, in this process, can not by messages transmitted to CPU, i.e. CPU not perception to this of RB, causes to be carried out synchronously this MAC Address by ESADI protocol massages.

Based on this, in embodiments of the present invention, for user-side port all in Trill territory, need to forbid MAC automatic learning (forbidding that hardware learns), change the mode that software learning or Shou Gong Pei Ge MAC Address or agreement generate original MAC address forwarding-table item automatically into.For software learning, after message entry port, first go up CPU, analyzed the source MAC of message by CPU, add MAC address entries to hardware.Wherein, on message after CPU, CPU can extract the source MAC of message, except adding local forwarding-table item, also can by address synchronization mechanism, and the distant-end node to other carries out synchronously.

And for the port allowing Trill message to pass through, as Trill mouth and Hybrid(mix) mouth, in embodiments of the present invention, then need to forbid its study (comprising software, hardware study) MAC Address, change the mode that Shou Gong Pei Ge or agreement generate original MAC address forwarding-table item automatically into.Such as, receive after distant-end node spreads the MAC Address of coming, need to calculate the path of this end node to this MAC Address according to topology information, if there are many, then need interpolation ECMP list item, such as this MAC Address is by link(link) 1 be diffused into this end node, but be through calculating, find link1,2,3 is all the path arriving this MAC Address, then descend during forwarding list item and need link1, as the outbound port arriving this MAC Address after 2,3 polymerizations.

In addition, when using ESADI protocol synchronization MAC Address, all nodes (comprising transmission node (i.e. transit node)) all need process ESADI message.

After in Trill territory, each RB receives the ESADI protocol massages of other RB transmission, extract the nickname information of MAC Address, vlan information and these other RB wherein carried, and inquire about corresponding nickname routing table according to this nickname, determine the outbound port that this nickname is corresponding, then according to determined outgoing interface, the MAC Address extracted and vlan information, generate original MAC address forwarding-table item and issue data retransmission 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.

When RB each in Trill territory forwards the data message received, Trill encapsulation is not carried out to this message, and according to the original MAC forwarding-table item of correspondence, message is directly 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.

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 Pei Ge to be polymerized, 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.

Can be found out by above flow process, when the node device of large double layer network receives two layers of unicast message, do not need to carry out large two-layer protocol encapsulation to these two layers of unicast messages, but on hardware, inquire about corresponding MAC forwarding-table item according to the target MAC (Media Access Control) address of these two layers of unicast messages, and according to the MAC forwarding-table item inquired by primary with native(for these two layers of unicast messages) form forwards this message, when large two layers of networking technology and other technologies coexist networking, for 802.1Br technology and the networking of Trill technology co-existence, when message enters Trill network from 802.1Br network, only need to remove E-tag encapsulation, and do not need to carry out Trill encapsulation, the forwarding of message in Trill network can be realized, when oppositely entering 802.1Br network from Trill network, because message does not carry out Trill encapsulation, therefore, the E-tag encapsulation of 802.1Br only need be carried out to this message, the forwarding of message in 802.1Br network can be realized, effectively evade in chip cannot processing in a pipeline simultaneously and first removed E-tag encapsulation (Trill encapsulation), change the defect of the flow process of Trill encapsulation (E-tag encapsulation) again into, under the prerequisite not needing E Wai Pei Ge winding mouth, achieve large two layers of networking technology and other technologies and to coexist the message repeating of networking.

In order to be illustrated more clearly in the embodiment of the present invention, below for the Trill group-network construction shown in Fig. 2, the specific implementation process of the message repeating technology that the embodiment of the present invention provides is described.

As shown in Figure 2, 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;

MAC Address on each access layer equipment is as follows:

Nickname-1(and nickname is the equipment of nickname-1, lower with) on have VLAN1/mac1, VLAN2/mac2, VLAN3/mac3;

Nickname-4 there are VLAN1/mac4, VLAN2/mac5, VLAN3/mac6;

Nickname-(n-1) there is VLAN10/mac10;

Nickname-n there are VLAN1/mac7, VLAN2/mac8, VLAN3/mac9;

L3 gateway, in each core layer equipment, each core layer equipment has VLAN1, VLAN2 and VLAN3.For nickname-g1, the MAC Address of the L3 interface on it is: VLAN1/mac-v1, VLAN2/mac-v2, VLAN3/mac-v3.

In Trill territory, on all RB, Jun Pei Ge has L2ISIS agreement, and each RB calculates nickname unicast routing table and the multicast table in Trill territory by L2ISIS agreement, and this nickname unicast routing table and multicast table only retain on software, are not handed down to hardware.Wherein, in networking shown in Fig. 2, the unicast routing table to other nodes of part that nickname-1 generates can be as shown in table 1:

Table 1

Destination(object)	Nexthop(down hop)
		Nickname-4	P1、P2、P3、P4（ECMP）
Nickname-g1	P1
		Nickname-n	P1、P2、P3、P4（ECMP）

Wherein, there are many equal-cost routes in the singlecast router of nickname-1 to nickname-4, i.e. ECMP(Equal-Cost Multipath Routing, equal cost multipath).

In Trill territory, on all RB, Hai Pei Ge has ESADI agreement, by the synchronization mechanism of ESADI agreement, the MAC Address of user side under each RB is synchronized to every other RB(and comprises transmission node).Wherein, after RB receives EASDI protocol massages, need, by this ESADI protocol massages transmitted to CPU, to be forwarded according to the nickname multicast table preserved in software by CPU.

It should be noted that, owing to only storing nickname route table items in transmission node (transit node) in existing Trill agreement, and there is no MAC address entries, therefore, in existing Trill network, transmission node does not need process ESADI protocol massages, but in embodiments of the present invention, because each RB needs to generate the MAC forwarding-table item being used to guide message repeating, therefore, transmission node is also by ESADI protocol massages and other RB(core layer equipment and access layer equipments in Trill territory) synchronous mac address information.

Simultaneously, RB receives ESADI protocol massages, and by after this ESADI protocol massages transmitted to CPU, need the nickname information according to the MAC Address of carrying in this ESADI protocol massages and correspondence, and the nickname unicast routing table preserved in software, generate corresponding MAC to transmit, and be issued to hardware.

Wherein, when the nickname information inquiry corresponding according to the MAC Address of carrying in EASID protocol massages to nickname singlecast router list item in outbound port be single physical port time, using this physical port as during the MAC generated transmits to should the outbound port of MAC Address, and issue hardware.

Such as, nickname-1 receives the VLAN1/mac-v1 that nickname-g1 is synchronously come by ESADI protocol massages, after this ESADI protocol massages transmitted to CPU, inquiry nickname unicast routing table, the outbound port inquiring nickname singlecast router list item corresponding to nickname-g1 is that P1(is see table 1), finally can generate MAC forwarding-table item as shown in table 2:

Table 2

VLAN	MAC	Egress port(outbound port)
			VLAN1	mac-v1	P1

When the nickname information inquiry corresponding according to the MAC Address of carrying in ESADI protocol massages to nickname singlecast router list item in outbound port be ECMP time, each subport is polymerized, to should the outbound port of MAC Address in transmitting as the MAC generated, and issue hardware.

Such as, nickname-1 receives the VLAN1/mac4 that nickname-4 is synchronously come by ESADI protocol massages, after this ESADI protocol massages transmitted to CPU, inquiry nickname singlecast router list item, the outbound port inquiring nickname singlecast router list item corresponding to nickname-4 is that P1, P2, P3 and P4 form ECMP(see table 1).Now on nickname-1 equipment, P1-P4 is done and is polymerized, form an aggregation port, finally can generate MAC forwarding-table item as shown in table 3:

Table 3

VLAN	MAC	Egress port(outbound port)
			VLAN1	mac4	Trunk（P1、P2、P3、P4）

Further, consider that the technical scheme that the embodiment of the present invention provides needs by software synchronization MAC Address, for large MAC environment (as more than 1M scale), need synchronous MAC Address amount larger, the processing load of ESADI protocol massages is heavier, in embodiments of the present invention, the processing load reducing ESADI protocol massages can be taken some measures.

When ESADI agreement just brings into operation, during the synchronously respective MAC Address of each RB, more ESADI protocol massages can be sent, but because this process belongs to the initial transition process that network just set up, duration is shorter, therefore, although each RB processing load is heavier in this process, less on overall performance of network impact.

When the initial MAC Address of network synchronously completes, just enter long-term Timing Synchronization and trigger the process refreshed, this process is the main existence of network, if synchronous MAC Address amount is excessive, larger on overall performance of network impact.Therefore, in embodiments of the present invention, can take some measures to reduce Timing Synchronization and trigger in refresh process, the processing load of ESADI protocol massages.

Concrete, for large MAC environment, in Timing Synchronization and triggering refresh process, the principal element affecting overall performance of network has two:

1), the MAC Address amount of Timing Synchronization is large, and ESADI protocol massages traffic volume is large, causes RB processing load in network to increase the weight of.For this problem, in embodiments of the present invention, can according to the virtual condition of network, extend the time of timing synchronization interval, such as, the temporal frequency of the Timing Synchronization defined in standard is 30 seconds synchronous 3 times, in embodiments of the present invention, then Ke Yi sets Ge as 1 minute (or longer time) synchronous 3 times, to reduce sync message transmission frequency, reduces RB processing load.

2), the frequent vacation of MAC Address is aging (such as, next main frame of RB sends message in Trill territory, MAC Address is learned to corresponding RB, afterwards, this main frame long period no longer sends message, causes the MAC Address of corresponding RB to this main frame learnt to carry out aging, afterwards, this main frame sends message again in Trill territory, and corresponding RB needs the MAC Address relearning this main frame), cause the renewal message of ESADI frequently to send.For this problem, in embodiments of the present invention, the impact on network performance that following two kinds of modes at least can be adopted to cause to reduce this problem:

A), extend the MAC address aging time (i.e. the timing length of MAC address aging timer), reduce concussion number of times;

B), in ESADI agreement, the timing length of this Ta of timer Ta(that introducing one is new is greater than the timing length of MAC address aging timer, MAC ageing timer and Ta are reset during MAC address learning simultaneously, the timing length of Ta can according to embody rule scene and MAC Address scale Lai She Ge), only have when Ta time-out, MAC Address refreshes not yet, just to this MAC Address carry out aging (namely delete MAC transmit in should the list item of MAC Address, lower same), external transmission ESADI cancels message, to cancel on other RB study to this MAC Address (i.e. other RB unit deletion self MAC transmit in should the list item of MAC Address).

For mode b), in embodiments of the present invention, can using the current all MAC Address under port+VLAN as a pool(pond), only have pool to change, just externally send LSP and refresh MAC Address.Wherein, the change principle of pool can comprise:

(1), when there is (RB newly learns local mac address) in new MAC Address first time in local pool, thinks that pool change, send ESADI renewal message and learn this new MAC Address by other RB;

(2) during Ta time-out, the MAC Address learnt also does not refresh, then think that this MAC Address needs aging, the list item (list item deletion when the ageing timer of correspondence is overtime that this MAC Address on hardware is corresponding) that this MAC Address on deletion local software is corresponding, externally transmission ESADI renewal message carries out aging by other nodes to this MAC Address simultaneously;

(3), receive local pool(from other RB and receive the local pool of RB that ESADI upgrades message) ESADI renewal message (the VMotion scene that refreshes of MAC Address, i.e. virtual machine (vm) migration scene), refresh the outbound port of list item corresponding to this MAC Address on local software, also on synchronous refresh hardware to should the outbound port of list item of MAC Address.

The indeclinable principle of pool can comprise:

(1), MAC address aging timing time-out, but Ta also time-out time, this MAC Address refreshes not yet, then only delete the list item that on local hardware, this MAC Address is corresponding, but list item corresponding on software still retains, and does not externally send ESADI and upgrades message;

(2), MAC Address that hardware is removed is when learning hardware again, also retains list item corresponding to this MAC Address, therefore, do not think that pool changes, externally do not send ESADI and upgrade message due on now software.

By the way, the frequent false aging ESADI caused of MAC Address can be avoided to upgrade the large problem of message traffic volume, reduce RB processing load, improve the stability of network.

For broadcasting packet, in embodiments of the present invention, the mode directly broadcasted according to chip VLAN broadcast domain scope (bitmap) can be adopted to forward.

In embodiments of the present invention, can Shang node device the broadcast domain scope of She Ge VLAN, 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

Concrete, still for the Trill technology in data center, in embodiments of the present invention, can according to the broadcast domain scope of each VLAN in the VLAN cutting tree Lai She Ge hardware chip in TRILL territory, user-side port carrys out corresponding She Ge according to VLAN port allowing pass through; For TRILL mouth, can not according to the VLAN Lai She Ge allowing to pass through, but the VLAN cutting tree calculated according to TRILL be needed to carry out corresponding She Ge (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 3, the link of bold portion is the broadcast domain of VLAN1, and according to this link topology, on nickname-1, the bitmap of ， She Ge VLAN1 comprises user-side port P5 and up going port P1-P4; On nickname-g1, the bitmap of ， She Ge VLAN1 only comprises P1, P4 and Pn, and nickname-4 only comprises user-side port P5 and up going port P1; On nickname-n, only comprise user-side port P5 and up going port P1.For the link of the bitmap She Ge principle of VLAN2 on each RB with 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.

Wherein, above-mentioned VLAN cutting tree carries out beta pruning based on VLAN to distribution tree and obtains.Concrete, in Trill territory, for each VLAN, each distribution tree all needs to carry out cutting, to wipe out the branch not having potential recipient; Multicast/broadcast data in this VLAN can only not forwarded by the branch wiped out at this distribution tree.

For TRILL mouth, the broadcast domain scope of VLAN specifically comprise above-mentioned VLAN cutting tree by way of each RB on land port, namely this VLAN cutting tree by way of each RB on outbound port.

Further, in embodiments of the present invention, after MAC transmits and is issued to hardware, if RB receives two layers of unicast message, RB refusal carries out Trill encapsulation (namely not carrying out Trill encapsulation to these two layers of unicast messages) to these two layers of unicast messages, according to the target MAC (Media Access Control) address inquiry MAC address entries of these two layers of unicast messages, and these two layers of unicast messages are sent from the outbound port (egressport) the MAC address entries inquired with native form.

For host1(MAC address in VLAN1 in scene shown in Fig. 3 for mac1) to host7(MAC address for mac7) message repeating flow process be described.Wherein, the MAC of the upper generation of nickname-1, nickname-g1, nickname-n transmits can as shown in Figure 3, specifically as shown in following table:

MAC on table 4, nickname-1 transmits

VLAN	MAC	Egress port
			VLAN1	mac1	P5
VLAN1	mac4	Trunk（P1、P2、P3、P4）
			VLAN1	mac7	Trunk（P1、P2、P3、P4）
VLAN1	mac-v1	P1
			VLAN2	mac2	P6
VLAN2	mac5	Trunk（P1、P2、P3、P4）
			VLAN2	mac8	Trunk（P1、P2、P3、P4）
VLAN2	mac-v2	P1
			VLAN3	mac3	P7
VLAN3	mac6	Trunk（P1、P2、P3、P4）
			VLAN3	mac9	Trunk（P1、P2、P3、P4）
VLAN3	mac-v3	P1

MAC on table 5, nickname-g1 transmits

VLAN	MAC	Egress port
			VLAN1	mac1	P1
VLAN1	mac4	P4
			VLAN1	mac7	Pn
VLAN1	mac-v1	Local L3 marks
			VLAN2	mac2	P1
VLAN2	mac5	P4
			VLAN2	mac8	Pn
VLAN2	mac-v2	Local L3 marks
			VLAN3	mac3	P1
VLAN3	mac6	P2
			VLAN3	mac9	Pn
VLAN3	mac-v3	Local L3 marks

MAC on table 6, nickname-n transmits

VLAN	MAC	Egress port
			VLAN1	mac1	Trunk（P1、P2、P3、P4）
VLAN1	mac4	Trunk（P1、P2、P3、P4）
			VLAN1	mac7	P5
VLAN1	mac-v1	P1
			VLAN2	mac2	Trunk（P1、P2、P3、P4）
VLAN2	mac5	Trunk（P1、P2、P3、P4）
			VLAN2	mac8	P5
VLAN2	mac-v2	P1
			VLAN3	mac3	Trunk（P1、P2、P3、P4）
VLAN3	mac6	Trunk（P1、P2、P3、P4）

VLAN3	mac9	P5
			VLAN3	mac-v3	P1

As shown in Figure 4, be the schematic flow sheet of a kind of two layers of unicast message retransmission method that the embodiment of the present invention provides, can comprise the following steps:

Step 401, host1 send message (two layers of unicast message) to nickname-1, and the target MAC (Media Access Control) address of this message is mac7, and affiliated VLAN is VLAN1.

After step 402, nickname-1 receive this message, transmit according to the target MAC (Media Access Control) address of this message and the MAC of affiliated VLAN inquiry this locality, and forward the packet to nickname-g1 according to the list item inquired.

Concrete, after nickname-1 receives the message of host1 transmission, target MAC (Media Access Control) address (mac7) and affiliated VLAN(VLAN1 according to this message) the local MAC of inquiry transmits, in hit Fig. 3, nickname-1 local mac transmits the list item in middle dotted line circle, in this list item, outbound port is aggregation port (Trunk1(P1-P4)), nickname-1 from choosing one of them, is assumed to be port P1 by hash algorithm, 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 this message, transmit according to the target MAC (Media Access Control) address of this message and the MAC of affiliated VLAN inquiry this locality, and forward the packet to nickname-n according to the list item inquired.

Concrete, after nickname-g1 receives the message of nickname-1 forwarding, target MAC (Media Access Control) address (mac7) and affiliated VLAN(VLAN1 according to this message) the local MAC of inquiry transmits, list item in the list item dotted line circle that in hit Fig. 3, nickname-g1 local mac is transmitted in middle dotted line circle, in this list item, outbound port is Pn, is gone out by this message from this port repeat.Wherein, nickname-g1 does not also carry out Trill encapsulation to this message.

After step 404, nickname-n receive this message, transmit according to the target MAC (Media Access Control) address of this message and the MAC of affiliated VLAN inquiry this locality, and forward the packet to host7 according to the list item inquired.

Concrete, after nickname-n receives the message of nickname-g1 forwarding, target MAC (Media Access Control) address (mac7) and affiliated VLAN(VLAN1 according to this message) the local MAC of inquiry transmits, in hit Fig. 3, nickname-n local mac transmits the list item in middle dotted line circle, the outbound port of this list item is P5, is gone out by this message from this port repeat.

Further, in embodiments of the present invention, in the network topology change (node device or link failure etc. are abnormal as found) of large double layer network, cause large double layer network to be transmitted and/or VLAN cutting tree upgrade after, node device can upgrade the broadcast domain scope of original MAC address forwarding-table item and/or corresponding VLAN as the case may be.

Concrete, when the outgoing interface of the forwarding-table item during large double layer network is transmitted occurs to upgrade, node device can upgrade the outgoing interface of corresponding original MAC address forwarding-table item;

When the forwarding-table item during large double layer network is transmitted is deleted, node device can be determined the destination node equipment of deleted forwarding-table item and belong to the local mac address of this destination node equipment, and then the original MAC address forwarding-table item that the local mac address deleting this destination node equipment is corresponding;

When VLAN cutting tree occurs to upgrade, node device can according to the broadcast domain scope of the corresponding VLAN of VLAN cutting tree Chong Xin She Ge after renewal.

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 node device then needs Trill unicast routing table and the multicast table of the refreshing of the network topology after according to link failure self.

Wherein, for Trill unicast routing table, only have the list item that outbound port changes, just refresh the outbound port of corresponding MAC forwarding-table item.

Such as, the upper MAC forwarding-table item to VLAN1/mac7 of nickname-1 will be refreshed by table 7 is table 8:

Table 7

VLAN	MAC	Egress port
			VLAN1	Mac7	Trunk（P1、P2、P3、P4）

Table 8

VLAN	MAC	Egress port
			VLAN1	Mac7	Trunk（P2、P3、P4）

For Trill multicast table, each node device needs to generate new broadcast tree according to the network topology after link failure, and again refreshes the broadcast domain scope of each VLAN according to this new broadcast tree.Wherein, the user-side port after broadcast domain scope after this refreshing comprises link failure, each node device allowing this VLAN to pass through is obtain the beta pruning that this new broadcast tree carries out distribution tree based on VLAN with the large double layer network side interface be positioned on this VLAN cutting tree on this node device, this VLAN cutting tree.

Scene two, node device fault

See Fig. 6, suppose that nickname-1 breaks down, 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 node device needs the Trill unicast routing table and the multicast table that refresh self according to the network topology after nickname-1 fault.Wherein, because nickname-1 breaks down, therefore, the route arriving nickname-1 will be no longer included in the Trill unicast routing table on other node devices.

In Trill network, the control plane of each node device deletes all MAC forwarding-table items (the MAC forwarding-table item of the MAC Address of the main frame hung under such as corresponding nickname-1) this node device belonging to the node device (i.e. nickname-1) broken down.For Trill unicast routing table, only have the vicissitudinous list item of outbound port, just refresh the outbound port of corresponding MAC forwarding-table item.

Correspondingly, similar with link failure scene, for Trill multicast table, each node device needs to generate new broadcast tree according to the network topology after node device fault, and again refreshes the broadcast domain scope of each VLAN according to this new broadcast tree.Such as, in the scene shown in Fig. 6, on nickname-g1, the broadcast domain scope of VLAN1 will delete the connected port of nickname-1 and nickname-g1.

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(VxlanTunnel 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 B-MAC 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 a kind of large two-layer network device, can be applied to said method embodiment.

As shown in Figure 7, for the structural representation of a kind of large two-layer network device that the embodiment of the present invention provides, this large two-layer network device can be applied to as node device the large double layer network that multiple node device sets up based on large double layer network agreement, and this large two-layer network device comprises:

Address management module 71, for can reach the broadcast tree of all node devices in described large double layer network by one, the local mac address newly learn described large two-layer network device and affiliated VLAN are advertised to other node devices, and described local mac address comprises the MAC Address learnt from the user network side of this equipment connection;

List item maintenance module 72, for to receive from described broadcast tree at described large two-layer network device other node devices notice described in after the first MAC Address of newly learning of other node devices and an affiliated VLAN, according to the large double layer network mark of other node devices described, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determine the outgoing interface that other node devices described are corresponding, and then generate original MAC address forwarding-table item corresponding to described first MAC Address, wherein, VLAN in described original MAC address forwarding-table item is a described VLAN, target MAC (Media Access Control) address is described first MAC Address, outgoing interface is the outgoing interface that other node devices described are corresponding,

Packet forwarding module 73, for after described large two-layer network device receives unicast data message, according to target MAC (Media Access Control) address and the affiliated VLAN of described unicast data message, mate in described original 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 list item maintenance module 72 can be specifically for, realize the large double layer network mark according to other node devices described in the following manner, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determines the outgoing interface that other node devices described are corresponding:

Wherein, described packet forwarding module 73 can be specifically for, and the outgoing interface realized in the following manner by mating list item directly forwards described unicast data message and do not carry out large double layer network protocol encapsulation:

Wherein, described address management module 71 also can be used for, and by described broadcast tree, the aging local mac address of generation and affiliated VLAN is advertised to other node devices;

Described list item maintenance module 72 also can be used for, receive other node devices described in the notice of other node devices from described broadcast tree and the second aging MAC Address and affiliated VLAN occur, and from described original MAC address forwarding-table item, delete described second MAC Address and the forwarding-table item corresponding to affiliated VLAN.

Wherein, this large two-layer network device, for the combination of self different interface and VLAN, joins the MAC Address pond of Ge mono-correspondence respectively, for be maintained in study on this corresponding interface to the local mac address belonging to corresponding VLAN;

Described address management module 71 can be specifically for, when new study is to local mac address, 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, and, after one section of aging Preset Time occurs local mac address, aging local mac address is deleted from corresponding MAC Address pond; Add when newly learning the local mac address arrived in MAC Address pond, by described broadcast tree, the local mac address newly learnt and affiliated VLAN are 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.

Wherein, described packet forwarding module 71 also can be used for,

Wherein, described list item maintenance module 72 also can be used for, in the network topology change of described large double layer network, after causing large double layer network to be transmitted upgrading, if large double layer network transmit in the outgoing interface of forwarding-table item upgrade, upgrade the outgoing interface of the original MAC address forwarding-table item of correspondence; If large double layer network transmit in forwarding-table item deleted, determine the destination node equipment of deleted forwarding-table item and belong to the local mac address of this destination node equipment, and then the original MAC address forwarding-table item that the local mac address deleting this destination node equipment is corresponding;

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

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, the method comprises:

2. the method for claim 1, it is characterized in that, the large double layer network mark of other node devices described in described basis, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determine to comprise the outgoing interface that other node devices described are corresponding:

3. method as claimed in claim 2, is characterized in that, the described outgoing interface by coupling list item directly forwards described unicast data message and do not carry out large double layer network protocol encapsulation, comprising:

4. the method for claim 1, is characterized in that, also comprises:

5. the method for claim 1, it is characterized in that, each node device, for the combination of self different interface and VLAN, joins the MAC Address pond of Ge mono-correspondence respectively, for be maintained in study on this corresponding interface to the local mac address belonging to corresponding VLAN;

6. the method for claim 1, is characterized in that, the method also comprises:

7. method as claimed in claim 6, is characterized in that, in the network topology change of described large double layer network, causes large double layer network to be transmitted and/or after VLAN cutting tree upgrades, the method also comprises:

8. a large two-layer network device, be applied to as node device the large double layer network that multiple node device sets up based on large double layer network agreement, it is characterized in that, this large two-layer network device comprises:

9. large two-layer network device as claimed in claim 8, it is characterized in that, described list item maintenance module specifically for, realize the large double layer network mark according to other node devices described in the following manner, inquiry is transmitted based on the large double layer network of described large double layer network protocol generation in advance, determines the outgoing interface that other node devices described are corresponding:

10. two-layer network device as claimed in claim 9 large, is characterized in that, described packet forwarding module specifically for, the outgoing interface realized in the following manner by mating list item directly forwards described unicast data message and does not carry out large double layer network protocol encapsulation:

11. large two-layer network devices as claimed in claim 8, is characterized in that,

Described address management module also for, by described broadcast tree, the aging local mac address of generation and affiliated VLAN are advertised to other node devices;

12. large two-layer network devices as claimed in claim 8, it is characterized in that, this large two-layer network device, for the combination of self different interface and VLAN, joins the MAC Address pond of Ge mono-correspondence respectively, for be maintained in study on this corresponding interface to the local mac address belonging to corresponding VLAN;

13. two-layer network devices as claimed in claim 8 large, is characterized in that, described packet forwarding module also for,

14. large two-layer network devices as claimed in claim 13, is characterized in that,

Described list item maintenance module also for, in the network topology change of described large double layer network, after causing large double layer network to be transmitted upgrading, if large double layer network transmit in the outgoing interface of forwarding-table item upgrade, upgrade the outgoing interface of the original MAC address forwarding-table item of correspondence; If large double layer network transmit in forwarding-table item deleted, determine the destination node equipment of deleted forwarding-table item and belong to the local mac address of this destination node equipment, and then the original MAC address forwarding-table item that the local mac address deleting this destination node equipment is corresponding;