CN102075446A - Interconnection method of transparent interconnection network of lots of links in different places and operator edge device - Google Patents
Interconnection method of transparent interconnection network of lots of links in different places and operator edge device Download PDFInfo
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Abstract
The invention discloses an interconnection method of a transparent interconnection network of lots of links in different places and an operator edge device, wherein a first site and a second site belong to the same VPN (Virtual Private Network), implement interconnection in different places through an MPLS (Multiple Protocol Label Switching) L3VPN (Layer-3 Virtual Private Network), and respectively achieve the access to the MPLS L3VPN through a first PE (Provider Edge) and a second PE, a first CE (Customer Edge) and a second CE are respectively located at the first site and the second site, and a first RB and a second RB are respectively an optional RB under the first CE and the second CE; the method comprises the steps that: the first PE and the first CE interacts a TRILL (Transparent Interconnection of Lots of Links) IS-IS message to learn local TRILL route of the first RB, and transmit the local TRILL route of the first RB to the second PE after adding a VPN identifier; the second PE transmits the local TRILL route of the first RB to the second RB via the second CE; the second PE receives a TRILL data message of which the destination is the first RB, and transmits the message to the first PE according to the local TRILL route of the first RB, and the first PE transmits the message to the first RB according to the local TRILL route of the first RB. The interconnection method of the transparent interconnection network of lots of links in different places implements the interconnection of the TRILL network in different places.
Description
Technical field
The present invention relates to the network interconnection technology field, be specifically related to multichain and connect transparent interconnected (TRILL, Transparent Interconnection of Lots of Links) network strange land interconnected method and provider edge equipment (PE, Provider Edge).
Background technology
Traditional double layer network, by Spanning-Tree Protocol (STP, Spanning Tree Protocol) blocking-up loop, waste bandwidth can not load balancing, and message does not carry life span (TTL, Time to Live) parameter, and broadcast storm is arranged when having temporary loop.And STP convergence is slow, and flow is had considerable influence.In addition, change in topology is influential to whole net.Fig. 1 has provided existing two layers of networking exemplary plot based on STP, and as shown in Figure 1, the link between B3 and the B4 is blocked by STP, causes bandwidth waste.
Fig. 2 has provided the typical networking of data center's double layer network, as shown in Figure 2, each equipment subregion (PoD, Position of Device) has a large amount of access switch and some convergence switches, eliminate redundant loop by STP during this time, polymerization realizes point-to-point load balancing and high reliability, its weak point is that convergence is slow after the change in topology, and STP blocks redundant loop and causes waste bandwidth, and has temporary loop, can not effectively realize the load balancing of redundant link, occur the link bottleneck easily, convergence device is wherein learnt a large amount of media interviews control (MAC again both as three layers of first jumping, Media Access Control) address, burden is than higher.
In sum, the Internet engineering duty group (IETF, Internet Engineering Task Force) tissue has proposed multichain and has met transparent interconnected (TRILL, Transparent Interconnection of Lots ofLinks) technology, it is a kind of MAC route technology, control plane uses Intermediate System-to-Intermediate System (ISIS, Intermediate System to Intermediate System) agreement is come path and the forwarding information between the facility for study, the MAC that datum plane is inherited Institute of Electrical and Electric Engineers (IEEE, Institute ofElectrical and Electronics Engineers) 802.1 transmits.Its effect is not move STP in the double layer network, supports redundant path and load balancing.Fig. 3 has provided existing two layers of networking diagram based on TRILL, and all links do not block in the network with loop as shown in Figure 3, and RB3 can be used for converting flow to two paths between the RB2.
When operation TRILL in data center's double layer network, the ISIS agreement of all during this time Access Layers and convergence-level equipment operation TRILL is calculated forward-path, do not move STP, flow between the server is transmitted and can be carried out through a large amount of redundant load balancing paths, and convergence-level equipment need not the MAC Address of learning server.
Support the equipment of TRILL to be the synthesis of switch and router feature, specific as follows:
At first, support that the equipment of TRILL is a switch, because it has following feature:
End-to-end delivery flow rate is not revised content frame.Routing bridge (RB, Route Bridge) is supported zero configuration and configuration automatically.The scope that RB E-Packets is subjected to VLAN (VLAN, Virtual LocalArea Network) constraint, and is identical with IEEE 802.1Q.RB can support priority, and is identical with IEEE 802.1Q.RB can learn MAC Address at datum plane, and is identical with IEEE 802.1Q.
Secondly, supporting the equipment of TRILL also to have routing function, is a router, because:
RB is when transmitting, and each jumping all will be revised link layer address.RB is when transmitting, and each jumping all will reduce ttl value.RB uses Routing Protocol rather than generates tree.RB can learn MAC Address by control plane, and datum plane may not learnt.RB based on IP multicast control frame as Internet Group Management Protocol (IGMP, Internet Group Management Protocol), multicast listener is found (MLD, Multicast Listener Discovery), multicast router finds that (MRD, Multicast RouterDiscovery) waits the constrained multicast forwarding of flow.
Fig. 4 has provided the form of TRILL message, as shown in Figure 4, and wherein:
The TRILL head is used for the route querying of TRILL to be transmitted, and Nickname wherein is 2 bytes, and RB or multicast tree sign for using in the repeating process are similar to the IP address, 64K Nickname of the maximum support of each RB; Outlet Nickname field and inlet Nickname field are arranged in the message.For exporting Nickname: if unicast message, expression needs the RB of this message of decapsulation; If multicast message, the tree root of expression forwarding multicasting tree.For inlet Nickname: the RB of TRILL encapsulation is carried out in expression to message.
RB is carrying out message TRILL when encapsulation, must use fixing Nickname for the message of certain source MAC and VLAN.
TRILL searches list item according to Nickname and transmits, and Nickname is similar to the IP address.
The data forwarding plane of TRILL equipment comprises four parts:
1, replacement part: be used to carry out common two layers of forwarding, MAC address learning, be similar to common switch.
2, TRILL route parts: be used to carry out TRILL route querying, adjacency list maintenance, route learning, support agreements such as ISIS, HELLO, be similar to common router.
3, inner connectivity port: carrying need be carried out the message that TRILL transmits, and allows the message of all VLAN to pass through, and supports end site address distributing information (ESADI, END Station AddressDistribution Information) agreement.
4, control VLAN: be used to carry TRILL encapsulation back message, different segment VLAN can be different, mixing on (HYBRID) link, and control VLAN refers to converge (TRUNK) flow.
At present, can adopt and cover transfer of virtualization (OTV, Overlay Transport Virtualization) or VPLS (VPLS, Virtual Private LAN Service) or based on VPLS (VPLSoGRE, the VPLS over Generic Routing Encapsulation) technology of generic route encapsulation realize that data center is interconnected.Fig. 5 has provided and has adopted the VPLS technology to carry out the interconnected networking diagram of data center, as shown in Figure 5, VPLS simulates LAN, the scope of LAN is extended to strange land data center, client edge device (CE, Client Edge) 1, CE2, CE3 belongs to different VPN (VPN respectively, Virtual Private Network), CE1, CE2, CE3 is respectively by provider edge equipment (PE, Provider Edge) 1, PE2, PE3 inserts the MPLS backbone network, at PE1, PE2, virtual switch instance (the VSI of each VPN website of the last generation of PE3, Virtual Switch Instance), (PW Pseudowire) connects to set up pseudo-line between the VSI of different PE, PW can be regarded as two layers of common exchange mouth, carries out MAC address learning.
Fig. 6 has provided the model of the VSI on the PE1, and as shown in Figure 6, PW:PW3 wherein, PW1 are existing as the exchange cause for gossip of VSI.
Fig. 7 has provided the list item of using in the data forwarding process of existing VPLS VSI, and as shown in Figure 7, MAC Address can be learnt on PW as can be seen, can be with PW outgoing interface in return when VSI transmits.
Fig. 8 carries out the interconnected networking diagram of data center for existing employing VPLSoGRE technology, as shown in Figure 8, VPLS simulates LAN, the scope of LAN is extended to strange land data center, but the VPLS technology with pure when core net transmits is different, and VPLS uses multiprotocol label switching (MPLS, Multi-Protocol Label Switching) technology that message is forwarded to outlet PE, VPLSoGRE is based on then that IP transmits, and is applicable to that core net do not support the network of MPLS.
Fig. 9 has provided existing employing VPLSoGRE technology to carry out in the interconnected networking of data center, the message format that in core net, transmits, as shown in Figure 9, wherein, leftmost DMAC, SMAC are respectively the MAC Address of next jumping in the core net and the MAC Address of current device, IP is the address of outlet PE, the exit address of gre tunneling just, and middle DMAC, SMAC are respectively the MAC Address of source device and destination device.
The shortcoming of prior art scheme is as follows:
When the deployment TRILL of data center realizes the core net of two layers of networking, on InterWorking Equipment, TRILL head encapsulation can be entered the tunnel, thereby realize the TRILL network stride strange land data center, this moment, core net was used MPLS VPN network, perhaps MPLSoGRE network.If use technology internet data centers such as VPLS, OTV, the TRILL network at two data centers is separate so, and the TRILL path computing is irrelevant mutually, can't realize that promptly the strange land of TRILL network is interconnected.
Summary of the invention
The invention provides TRILL network strange land interconnected method and PE, interconnected with the strange land of realizing the TRILL network.
Technical scheme of the present invention is achieved in that
A kind of multichain connects transparent interconnected TRILL network strange land interconnected method, first and second website belongs to same virtual private network VPN and realizes that by multiprotocol label switching MPLS L3VPN the strange land is interconnected, the first client edge device CE is positioned at first website, the 2nd CE is positioned at second website, the first routing bridge RB is arbitrary RB that a CE hangs down, the 2nd RB is any RB that the 2nd CE hangs down, first website inserts MPLS L3VPN by the first provider edge equipment PE, second website inserts MPLS L3VPN by the 2nd PE, and this method comprises:
The one PE and the mutual TRILL Intermediate System-to-Intermediate System of CE IS-IS message are learnt the local TRILL route of a RB, the local TRILL route of the one RB is added the strange land PE that sends to after the VPN sign with the VPN coupling of a RB: the 2nd PE, so that the 2nd PE sends to local RB with the VPN coupling of a RB with the local TRILL route of a RB by the 2nd CE: the 2nd RB;
It is the TRILL data message of a RB that the one PE receives the destination that the 2nd PE sends, local TRILL route according to a RB sends to a RB with message, wherein, the 2nd PE is that the TRILL data message of a RB is that the 2nd CE sends to the 2nd PE to the destination that a PE sends, and the 2nd PE sends to a PE according to the local TRILL route of a RB with message.
A described PE adds the local TRILL route of a RB strange land PE that sends to after the VPN sign with the VPN coupling of a RB: the 2nd PE comprises:
The one PE is the VPN sign that the local TRILL route of a RB adds a RB, simultaneously, next jumping in the local TRILL route of a RB is changed to a PE.
A described PE adds the local TRILL route of a RB strange land PE that sends to after the VPN sign with the VPN coupling of a RB: the 2nd PE comprises:
The one PE is the VPN sign that the local TRILL route of a RB adds a RB, is that the VPN of a RB distributes a Border Gateway Protocol (BGP) mark simultaneously, the local TRILL route of a RB is stamped this BGP mark send to the 2nd PE afterwards;
And a described PE sends to strange land PE with the VPN coupling of a RB with the local TRILL route of a RB: further comprise after the 2nd PE:
The 2nd PE writes down the VPN sign of a RB and the corresponding relation of described BGP mark;
And described the 2nd PE further comprises before according to the local TRILL route of a RB message being sent to a PE:
The 2nd PE is identified at the BGP mark that self finds correspondence according to the VPN of a CE, according to the VPN sign of a CE and the outlet Nickname of this message, self finding the local TRILL route of a RB, according to next jumping in the local TRILL route of a RB, self finding corresponding Interior Gateway Protocol IGP mark, this message is carried out two layers of labels encapsulation, wherein, vpn label is this BGP mark, and outer layer label is this IGP mark, and this message is forwarded.
A described PE further comprises before according to the local TRILL route of a RB message being sent to a RB:
The one PE is according to vpn label: the BGP mark is learnt corresponding VPN sign, in the corresponding local TRILL routing table of this VPN sign, find the local TRILL route of a RB of the outlet Nickname correspondence of message, with the local TRILL route according to a RB message is sent to a CE, a CE sends to message the one RB again.
Described method further comprises:
The one PE and the mutual TRILL IS-IS of CE message are learnt the local TRILL route of a CE, the local TRILL route of the one CE is added the strange land PE that sends to after the VPN sign with the VPN coupling of a CE: the 2nd PE, so that the 2nd PE sends to local CE with the VPN coupling of a CE with the local TRILL route of a CE: the 2nd CE;
It is the TRILL data message of a CE that the one PE receives the destination that the 2nd PE sends, local TRILL route according to a CE sends to a CE with message, wherein, the 2nd PE is that the TRILL data message of a CE is that the 2nd CE sends to the 2nd PE to the destination that a PE sends, and the 2nd PE sends to a PE according to the local TRILL route of a CE with message.
PE in a kind of TRILL network comprises:
Local TRILL route learning sending module: the local TRILL route of learning local RB, the local TRILL route of this this locality RB is added the strange land PE that sends to after the VPN sign with the VPN coupling of this this locality RB, so that strange land PE sends to strange land RB with the VPN coupling of described local RB with the local TRILL route of described local RB, wherein, local RB and strange land RB lay respectively at and belong to same VPN and realize in the interconnected website in strange land by MPLS L3VPN;
TRILL data message forwarding module: the purpose that reception strange land PE sends is the TRILL data message of local RB, local TRILL route according to this this locality RB, give described local RB with this data message forwarding, wherein, described strange land PE is according to the described TRILL data message of local TRILL routing forwarding of described local RB.
Described local TRILL route learning sending module is further used for, before local TRILL route that should this locality RB sends to strange land PE with the VPN coupling of this this locality RB, add the VPN sign of this this locality RB for the local TRILL route of this this locality RB, simultaneously, next jumping in the local TRILL route of this this locality RB is changed to this PE.
Described local TRILL route learning sending module is further used for, before local TRILL route that should this locality RB sends to strange land PE with the VPN coupling of this this locality RB, add the VPN sign of this this locality RB for the local TRILL route of this this locality RB, the VPN that is this this locality RB simultaneously distributes a BGP mark, the local TRILL route of this this locality RB is stamped this BGP mark, so that: strange land PE is after receiving the local TRILL route of this this locality RB, write down the VPN sign of described local RB and the corresponding relation of described BGP mark, and receiving after purpose that strange land CE sends is the TRILL data message of described local RB, VPN according to strange land CE is identified at the BGP mark that self finds correspondence, according to the VPN sign of strange land CE and the outlet Nickname of this data message, find the local TRILL route of described local RB, according to next jumping in the local TRILL route of described local RB, find corresponding IGP mark, this data message is carried out two layers of label encapsulation, wherein, vpn label is this BGP mark, outer layer label is this IGP mark, and this data message forwarding is gone out.
Described TRILL data message forwarding module is further used for, before after receiving the TRILL data message that purpose that strange land PE sends is local RB, with this data message forwarding, giving described local RB, vpn label according to this data message: the BGP mark is learnt corresponding VPN sign, in the corresponding local TRILL routing table of this VPN sign, find the local TRILL route of described local RB of the outlet Nickname correspondence of message.
Described PE further comprises:
Strange land TRILL route receives preserves module: the local TRILL route of the strange land RB that reception strange land PE sends, the local TRILL route of preserving this strange land RB.
Described TRILL data message forwarding module is further used for, receiving the purpose that local RB sends is the TRILL data message of strange land RB, the local TRILL route of this strange land RB of module preservation is preserved in reception according to strange land TRILL route, and this message is transmitted to strange land PE.
Compared with prior art, the present invention has realized based on the TRILL network strange land of data center's interconnection technique of MPLS L3VPN interconnected.
Description of drawings
Fig. 1 is existing two layers of networking exemplary plot based on STP;
Fig. 2 is the typical networking diagram of existing data center double layer network;
Fig. 3 is existing two layers of networking diagram based on TRILL;
Fig. 4 is the form schematic diagram of TRILL message;
Fig. 5 carries out the interconnected networking diagram of data center for existing employing VPLS technology;
Fig. 6 is the illustraton of model of the VSI on the PE1 among Fig. 5;
The list item exemplary plot of Fig. 7 for using in the data forwarding process of existing VPLS VSI;
Fig. 8 carries out the interconnected networking diagram of data center for existing employing VPLSoGRE technology;
Fig. 9 carries out in the interconnected networking of data center for existing employing VPLSoGRE technology, the message format schematic diagram that transmits in core net;
Two layers of networking diagram that the TRILL network strange land that Figure 10 provides for the embodiment of the invention is interconnected;
The TRILL network strange land interconnected method flow chart that Figure 11 provides for the embodiment of the invention;
The composition schematic diagram of PE in the TRILL network that Figure 12 provides for the embodiment of the invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Two layers of networking schematic diagram that the TRILL network strange land that Figure 10 provides for the embodiment of the invention is interconnected, as shown in figure 10, website 1,2 is the strange land website of same VPN:VPN A, website 3,4 is the strange land website of same VPN:VPN B, website 1,2, website 3,4 realizes that by MPLS L3VPN the strange land is interconnected.
In actual applications, each TRILL network may comprise the website of more VPN, and the networking diagram of this moment can be obtained by Fig. 2 simple extension, draws no longer one by one at this.
Below provide the strange land website as website 1,2, how website 3,4 to realize the specific implementation that the strange land is interconnected:
The TRILL network strange land interconnected method flow chart that Figure 11 provides for the embodiment of the invention, in the present embodiment, if first, two websites are any two strange land websites that belong to same VPN:VPN A, first website and second website realize that by MPLS L3VPN the strange land is interconnected, the one CE is positioned at first website, the 2nd CE is positioned at second website, the one RB is arbitrary RB that a CE hangs down, the 2nd RB is any RB that the 2nd CE hangs down, first website inserts MPLS L3VPN by a PE, second website inserts MPLS L3VPN by the 2nd PE, and as shown in figure 11, its concrete steps are as follows:
Step 1101 a: PE and the mutual TRILL ISIS of CE protocol massages, learn the local TRILL route of a RB, the one PE preserves the local TRILL route of a RB, and put in Border Gateway Protocol (BGP, the Border Gateway Protocol) routing table of self maintained after the local TRILL route of a RB is converted to the VPN-TRILL route.
The content of local TRILL route comprises: destination address, next jumping, outgoing interface etc.Here, it is used for the local TRILL route of the RB that the one PE preserves: it is the message of a RB that a PE transmits purpose, and wherein, destination address is: the TRILL address of a RB, next jumping is the TRILL address of a CE, and outgoing interface is that a PE goes up the interface that links to each other with a CE.
It is used for the VPN-TRILL route of the one RB: it is the message of a RB that strange land PE (as: the 2nd PE) transmits purpose, when the one PE is converted to the VPN-TRILL route in the local TRILL route with a RB, to be VPN A for the RD prefix of the last RB of this route interpolation, simultaneously, next jumping of route be changed to: self i.e. the TRILL address of a PE.
The one CE also is a RB.The one PE and a CE also can pass through mutual TRILL ISIS protocol massages, learn the local TRILL route of a CE, the one PE preserves the local TRILL route of a CE, and the local TRILL route of a CE is converted to the bgp routing table of putting into self maintained after the VPN-TRILL route.
Step 1102: a PE searches all PEs signs marking matched with the VPN of a RB in the corresponding relation of the PE of self maintained sign and VPN sign, be the 2nd PE in the present embodiment.
The one PE also can search all PEs signs marking matched with the VPN of a CE in the corresponding relation of the PE of self maintained sign and VPN sign, be the 2nd PE in the present embodiment.
Step 1103: a PE is that the VPN of a RB is that VPN A distributes a BGP mark, from bgp routing table, take out the VPN-TRILL route of a RB, this VPN-TRILL route is stamped this BGP mark, by multi-protocols internal bgp (MP-iBGP, Multi-Protocol internalBGP) message sends to all PE with the VPN of RB coupling, i.e. the 2nd PE in the present embodiment.
The one PE also can take out the VPN-TRILL route of a CE from bgp routing table, this VPN-TRILL route is stamped the BGP mark, sends to all PE with the VPN of CE coupling by the MP-iBGP message, i.e. the 2nd PE in the present embodiment.
Step 1104: the 2nd PE receives this MP-iBGP message, the VPN-TRILL route of a RB in the message is preserved TRILL routing table into VPN A, and the corresponding relation of the BGP mark in record VPN A and the message, simultaneously with the VPN-TRILL route of a RB by TRILL ISIS protocol massages be published to that self hangs down, with the CE of the VPN coupling of a RB be the 2nd CE.
In this step, after the 2nd PE receives the MP-iBGP message, also can generate TRILL fib table item according to the VPN-TRILL route, this list item comprises: purpose TRILL address, next jumping and outgoing interface, wherein, purpose TRILL address is the TRILL address of a RB, and next jumping is the TRILL address of a PE, and outgoing interface is the interface that enters of MP-iBGP message.After this, when the 2nd PE receives outlet Nickname when being the TRILL data message of TRILL address of a RB, just can the outgoing interface of message from list item be sent to a PE according to this list item.
Step 1105: the 2nd CE receives the VPN-TRILL route of a RB, with the VPN-TRILL route sending-down of a RB to i.e. the 2nd RB of the RB that self hangs down, the VPN-TRILL route that the 2nd RB receives and preserves a RB.
When having comprised the VPN-TRILL route of a CE in the MP-iBGP message, the processing procedure of the 2nd PE, the 2nd CE and step 1104,1105 are roughly the same.
Step 1106: the 2nd RB sends the TRILL data message to a RB, and the outlet Nickname in the TRILL head of message is the TRILL address of a RB, and this message at first arrives the 2nd CE, and the 2nd CE is transmitted to the 2nd PE with this message.
The form of TRILL data message as shown in Figure 4.Wherein, in the outer Ethernet header, outer target MAC (Media Access Control) address is the MAC Address of the 2nd CE, and outer source MAC is the MAC Address of the 2nd RB; In the internal layer Ethernet header, the internal layer target MAC (Media Access Control) address is the MAC Address of a RB, and the internal layer source MAC is the MAC Address of the 2nd RB.In the TRILL head, inlet Nickname is the TRILL address of the 2nd RB.
Step 1107: the 2nd PE receives this TRILL data message, VPN sign according to a CE is VPN A, in the corresponding relation of the VPN of self record sign and BGP mark, find corresponding BGP mark, according to the VPN sign of a CE and the outlet Nickname of this message, self finding the VPN-TRILL route of a RB, according to next jumping in the VPN-TRILL route of a RB, self finding corresponding Interior Gateway Protocol (IGP, Interior Gateway Protocol) mark, this message is being carried out two layers of label encapsulation, wherein, vpn label is this BGP mark, and outer layer label is this IGP mark, and this message is forwarded.
After network is set up, can carry out the IGP message interaction between the PE, obtain the path between the PE in twos, this path is represented with the IGP mark.In this step, because next jumping in the local TRILL route of the RB that the 2nd PE upward preserves is the TRILL address of a PE, therefore, the 2nd PE can arrive corresponding IGP mark according to the TRILL address search of a PE.
In this step, the 2nd PE can forward the outgoing interface of message from correspondence according to the TRILL fib table item that generates in the step 1104.
Step 1108: this TRILL data message arrives a PE, the one PE is according to vpn label: the BGP mark learns that corresponding VPN sign is VPN A, in the local TRILL routing table of the VPN A that self preserves, the outlet Nickname that searches message i.e. the local TRILL route of a RB of the TRILL address correspondence of a RB, according to the local TRILL route of a RB message is sent to a CE.
Here, the message interaction process between the 2nd PE and the PE is same as the prior art, is not described in detail.
The TRILL data message can eject outer layer label when last the P equipment of arrival, therefore, when message arrives outlet PE: during a PE, only remaining vpn label is also unstripped.Certainly, in actual applications, outer layer label also can be can't help last P equipment and peeled off, and is peeled off by outlet PE.
Step 1109: a CE receives this TRILL data message, peels off vpn label, and the outlet Nickname according in the message sends to a RB with message.
For the RB in the website of strange land as: the 2nd RB, the 2nd CE mail to the TRILL data message of a CE, and its processing procedure and step 1106～1108 roughly the same do not repeat them here.
In the embodiment of the invention, move the MP-iBGP agreement between the PE, be used for the local TRILL route of mutual VPN website; Move IGP agreement and LDP agreement between PE and the P, be used to make up the label forwarding tunnel of core net.
The composition schematic diagram of PE in the TRILL network that Figure 12 provides for the embodiment of the invention, as shown in figure 12, it mainly comprises: local TRILL route learning sending module 121, TRILL data message forwarding module 122 and strange land TRILL route receive preserves module 123, wherein:
Local TRILL route learning sending module 121: the local TRILL route of learning local RB, preserve the local TRILL route of this this locality RB, and local TRILL route that should this locality RB is converted to the VPN-TRILL route and sends to strange land PE with the VPN coupling of this this locality RB, so that strange land PE preserves the VPN-TRILL route of described local RB, and the VPN-TRILL route of described local RB sent to strange land RB with the VPN coupling of described local RB, wherein, local RB and strange land RB lay respectively at and belong to same VPN and realize in the interconnected website in strange land by MPLS L3VPN.
Local TRILL route learning sending module 121 is by adding the VPN sign of local RB for the local TRILL route of local RB, and next jumping in the local TRILL route of local RB changed to the TRILL address of this PE, the local TRILL route of local RB is converted to the VPN-TRILL route.
Local TRILL route learning sending module 121 is further used for, before VPN-TRILL route that should this locality RB sends to strange land PE with the VPN coupling of this this locality RB, BGP mark of VPN distribution for this this locality RB, the VPN-TRILL route of this this locality RB is stamped this BGP mark, so that: strange land PE is after the VPN-TRILL route that receives this this locality RB, write down the VPN sign of described local RB and the corresponding relation of described BGP mark, and receiving after purpose that strange land CE sends is the TRILL data message of described local RB, VPN according to strange land CE is identified at the BGP mark that self finds correspondence, according to the VPN sign of strange land CE and the outlet Nickname of this data message, find the VPN-TRILL route of described local RB, according to next jumping in the VPN-TRILL route of described local RB, find corresponding IGP mark, this data message is carried out two layers of label encapsulation, wherein, vpn label is this BGP mark, outer layer label is this IGP mark, and this data message forwarding is gone out.
TRILL data message forwarding module 122: the purpose that reception strange land PE sends is the TRILL data message of local RB, the local TRILL route of this this locality RB that preserves according to local TRILL route learning sending module 121, give described local RB with this data message forwarding, wherein, described strange land PE is according to the described TRILL data message of the VPN-TRILL routing forwarding of described local RB.
TRILL data message forwarding module 122 is further used for, before after receiving the TRILL data message that purpose that strange land PE sends is local RB, with this data message forwarding, giving described local RB, vpn label according to this data message: the BGP mark is learnt corresponding VPN sign, in the corresponding local TRILL routing table of this VPN sign, find the local TRILL route of described local RB of the outlet Nickname correspondence of message.
Strange land TRILL route receiver module 123: the VPN-TRILL route of the strange land RB that reception strange land PE sends, the VPN-TRILL route of preserving this strange land RB.
TRILL data message forwarding module 122 is further used for, and receiving the purpose that local RB sends is the TRILL data message of strange land RB, and the VPN-TRILL route of this strange land RB that preserves according to strange land TRILL route receiver module 123 is transmitted to strange land PE with this message.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (11)
1. a multichain connects transparent interconnected TRILL network strange land interconnected method, it is characterized in that, first and second website belongs to same virtual private network VPN and realizes that by multiprotocol label switching MPLS L3VPN the strange land is interconnected, the first client edge device CE is positioned at first website, the 2nd CE is positioned at second website, the first routing bridge RB is arbitrary RB that a CE hangs down, the 2nd RB is any RB that the 2nd CE hangs down, first website inserts MPLS L3VPN by the first provider edge equipment PE, second website inserts MPLS L3VPN by the 2nd PE, and this method comprises:
The one PE and the mutual TRILL Intermediate System-to-Intermediate System of CE IS-IS message are learnt the local TRILL route of a RB, the local TRILL route of the one RB is added the strange land PE that sends to after the VPN sign with the VPN coupling of a RB: the 2nd PE, so that the 2nd PE sends to local RB with the VPN coupling of a RB with the local TRILL route of a RB by the 2nd CE: the 2nd RB;
It is the TRILL data message of a RB that the one PE receives the destination that the 2nd PE sends, local TRILL route according to a RB sends to a RB with message, wherein, the 2nd PE is that the TRILL data message of a RB is that the 2nd CE sends to the 2nd PE to the destination that a PE sends, and the 2nd PE sends to a PE according to the local TRILL route of a RB with message.
2. method according to claim 1 is characterized in that, a described PE adds the local TRILL route of a RB strange land PE that sends to after the VPN sign with the VPN coupling of a RB: the 2nd PE comprises:
The one PE is the VPN sign that the local TRILL route of a RB adds a RB, simultaneously, next jumping in the local TRILL route of a RB is changed to a PE.
3. method according to claim 1 is characterized in that, a described PE adds the local TRILL route of a RB strange land PE that sends to after the VPN sign with the VPN coupling of a RB: the 2nd PE comprises:
The one PE is the VPN sign that the local TRILL route of a RB adds a RB, is that the VPN of a RB distributes a Border Gateway Protocol (BGP) mark simultaneously, the local TRILL route of a RB is stamped this BGP mark send to the 2nd PE afterwards;
And a described PE sends to strange land PE with the VPN coupling of a RB with the local TRILL route of a RB: further comprise after the 2nd PE:
The 2nd PE writes down the VPN sign of a RB and the corresponding relation of described BGP mark;
And described the 2nd PE further comprises before according to the local TRILL route of a RB message being sent to a PE:
The 2nd PE is identified at the BGP mark that self finds correspondence according to the VPN of a CE, according to the VPN sign of a CE and the outlet Nickname of this message, self finding the local TRILL route of a RB, according to next jumping in the local TRILL route of a RB, self finding corresponding Interior Gateway Protocol IGP mark, this message is carried out two layers of labels encapsulation, wherein, vpn label is this BGP mark, and outer layer label is this IGP mark, and this message is forwarded.
4. method according to claim 1 is characterized in that, a described PE further comprises before according to the local TRILL route of a RB message being sent to a RB:
The one PE is according to vpn label: the BGP mark is learnt corresponding VPN sign, in the corresponding local TRILL routing table of this VPN sign, find the local TRILL route of a RB of the outlet Nickname correspondence of message, with the local TRILL route according to a RB message is sent to a CE, a CE sends to message the one RB again.
5. method according to claim 1 is characterized in that, described method further comprises:
The one PE and the mutual TRILL IS-IS of CE message are learnt the local TRILL route of a CE, the local TRILL route of the one CE is added the strange land PE that sends to after the VPN sign with the VPN coupling of a CE: the 2nd PE, so that the 2nd PE sends to local CE with the VPN coupling of a CE with the local TRILL route of a CE: the 2nd CE;
It is the TRILL data message of a CE that the one PE receives the destination that the 2nd PE sends, local TRILL route according to a CE sends to a CE with message, wherein, the 2nd PE is that the TRILL data message of a CE is that the 2nd CE sends to the 2nd PE to the destination that a PE sends, and the 2nd PE sends to a PE according to the local TRILL route of a CE with message.
6. the PE in the TRILL network is characterized in that, comprising:
Local TRILL route learning sending module: the local TRILL route of learning local RB, the local TRILL route of this this locality RB is added the strange land PE that sends to after the VPN sign with the VPN coupling of this this locality RB, so that strange land PE sends to strange land RB with the VPN coupling of described local RB with the local TRILL route of described local RB, wherein, local RB and strange land RB lay respectively at and belong to same VPN and realize in the interconnected website in strange land by MPLS L3VPN;
TRILL data message forwarding module: the purpose that reception strange land PE sends is the TRILL data message of local RB, local TRILL route according to this this locality RB, give described local RB with this data message forwarding, wherein, described strange land PE is according to the described TRILL data message of local TRILL routing forwarding of described local RB.
7. PE according to claim 6, it is characterized in that, described local TRILL route learning sending module is further used for, before local TRILL route that should this locality RB sends to strange land PE with the VPN coupling of this this locality RB, add the VPN sign of this this locality RB for the local TRILL route of this this locality RB, simultaneously, next jumping in the local TRILL route of this this locality RB is changed to this PE.
8. PE according to claim 6, it is characterized in that, described local TRILL route learning sending module is further used for, before local TRILL route that should this locality RB sends to strange land PE with the VPN coupling of this this locality RB, add the VPN sign of this this locality RB for the local TRILL route of this this locality RB, the VPN that is this this locality RB simultaneously distributes a BGP mark, the local TRILL route of this this locality RB is stamped this BGP mark, so that: strange land PE is after receiving the local TRILL route of this this locality RB, write down the VPN sign of described local RB and the corresponding relation of described BGP mark, and receiving after purpose that strange land CE sends is the TRILL data message of described local RB, VPN according to strange land CE is identified at the BGP mark that self finds correspondence, according to the VPN sign of strange land CE and the outlet Nickname of this data message, find the local TRILL route of described local RB, according to next jumping in the local TRILL route of described local RB, find corresponding IGP mark, this data message is carried out two layers of label encapsulation, wherein, vpn label is this BGP mark, outer layer label is this IGP mark, and this data message forwarding is gone out.
9. PE according to claim 6, it is characterized in that, described TRILL data message forwarding module is further used for, before after receiving the TRILL data message that purpose that strange land PE sends is local RB, with this data message forwarding, giving described local RB, vpn label according to this data message: the BGP mark is learnt corresponding VPN sign, in the corresponding local TRILL routing table of this VPN sign, find the local TRILL route of described local RB of the outlet Nickname correspondence of message.
10. PE according to claim 6 is characterized in that, described PE further comprises:
Strange land TRILL route receives preserves module: the local TRILL route of the strange land RB that reception strange land PE sends, the local TRILL route of preserving this strange land RB.
11. PE according to claim 10, it is characterized in that, described TRILL data message forwarding module is further used for, receiving the purpose that local RB sends is the TRILL data message of strange land RB, the local TRILL route of this strange land RB of module preservation is preserved in reception according to strange land TRILL route, and this message is transmitted to strange land PE.
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