CN103973575B - Method and device for generating forwarding items - Google Patents
Method and device for generating forwarding items Download PDFInfo
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- CN103973575B CN103973575B CN201410241896.2A CN201410241896A CN103973575B CN 103973575 B CN103973575 B CN 103973575B CN 201410241896 A CN201410241896 A CN 201410241896A CN 103973575 B CN103973575 B CN 103973575B
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Abstract
The invention provides a method and a device for generating forwarding items and the device is applied to BEB (Backbone Edge Bridge) equipment of an SPB (Shortest Path Bridging) network. The method comprises the following steps: receiving a first link state advertisement message from an edge device, wherein the message comprises a BMAC (Backbone MAC) address of each network equipment of a PBB (Provider Backbone Bridge) network and a BMAC address of the edge device of the next hop of the BMAC address of each network equipment which reaches the PBB network; generating BMAC address items of each network equipment of the PBB network according to the generated BMAC address items of the edge device and the BMAC address of each network equipment of the PBB network, wherein the BMAC address items of each network equipment of the PBB network are the same as B-VID and interfaces of the generated BMAC address items of the edge device. Therefore, the BEB equipment of the SPB network can forward the data messages of the PBB network equipment according to the generated items.
Description
Technical field
The present invention relates to two layers of interconnection technique, more particularly to a kind of method and apparatus for generating forwarding-table item
Background technology
PBBN (Provider Backbone Bridge Network, operator backbone bridge joint network) is to adopt
The two of PBB (Provider Backbone Bridge, the operator backbone bridge joint) protocol construction of IEEE802.1ah protocol definitions
Layer internet.In PBBN, BEB (Backbone Edge Bridge, backbone edges) equipment and BCB (Backbone
Core Bridge, backbone network core bridges) B-SA (Backbone based on the outer layer of M-in-M encapsulated messages for receiving
Source Address, backbone network source address) study BMAC (Backbone MAC address, backbone network MAC Address) address
The BMAC list items of forward table.
SPBN (Shortest Path Bridge Network, shortest path bridging network) is to adopt IEEE802.1aq
Two layers of internet of SPB (Provider Backbone Bridge, the shortest path bridging) protocol construction of protocol definition.
In SPBN, BEB (Backbone Edge Bridge, backbone edges) equipment and BCB (Backbone Core Bridge,
Backbone network core bridges) based on LSDB (link state database, Link State synchronous between whole network equipment in SPBN
Database), each each calculates this equipment to the shortest path of each other bridging device in SPBN, according to the shortest path for calculating
Base generates the BMAC list items of BMAC forward tables (or claim Filtering database, filtered data base) and (or claims filtering
Entry, filtering meter item).
Due to the network equipment in PBBN from SPBN the network equipment generate BMAC list items mode it is different.When in SPBN
BEB equipment or BCB equipment when receiving the M-IN-M encapsulated messages in PBBN networks because cannot find matching B-SA's
BMAC list items and abandon the M-in-M messages from PBBN networks.
The content of the invention
Present invention aim at, there is provided a kind of method and apparatus for generating forwarding-table item, set to the BEB for making SPB network
The standby list item for generating the network equipment forwarding data packets to PBB networks.
For achieving the above object, the invention provides a kind of method for generating forwarding-table item, is applied to shortest path bridging
The BEB equipment of SPB network, wherein the method includes：Receive the first link state advertisement message from edge device；Wherein,
BMAC addresses and the BMAC as each network equipment for reaching the PBB networks including each network equipment of PBB networks
The BMAC addresses of the edge device of the next-hop of address；According to the BMAC address list items of the edge device for having generated and should
The BMAC addresses of each network equipment of PBB networks, generate the BMAC address list items of each network equipment of the PBB networks；Its
In, the B-VID and interface of the BMAC address list items of each network equipment of the PBB networks and the edge device that generates
The B-VID of BMAC address list items is identical with interface.
For achieving the above object, the invention provides a kind of device for generating forwarding-table item, is applied to shortest path bridging
The BEB equipment of SPB network, the wherein device include：
Receiving unit, receives the first link state advertisement message from edge device；Wherein, including PBB networks it is every
The BMAC addresses of the individual network equipment and as reach the PBB networks each network equipment BMAC addresses next-hop should
The BMAC addresses of edge device；
List item signal generating unit, according to the BMAC address list items of the edge device for having generated and the PBB networks each
The BMAC addresses of the network equipment, generate the BMAC address list items of each network equipment of the PBB networks；Wherein, the PBB networks
The B- of the BMAC address list items of the B-VID and interface of the BMAC address list items of each network equipment and the edge device for generating
VID is identical with interface.
Compared to prior art, the present invention can be generated to PBB networks in the BEB equipment of shortest path bridging SPB network
Network equipment forwarding data packets list item, for the data message of the BEB device forwards PBB network equipments of SPB network.
Description of the drawings
Fig. 1 is network diagram provided in an embodiment of the present invention.
Fig. 2 is introducing BMAC message schematic diagrames provided in an embodiment of the present invention.
Fig. 3 is introducing I-SID message schematic diagrames provided in an embodiment of the present invention.
Fig. 4 is network diagram provided in an embodiment of the present invention.
Fig. 5 is schematic device provided in an embodiment of the present invention.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with the accompanying drawings with specific embodiment pair
The present invention is described in detail.
A kind of method of generation forwarding-table item is present embodiments provided, the BEB for being applied to shortest path bridging SPB network sets
It is standby.The edge device of SPB network has also run PBB agreements.Wherein the method includes：
Step one, the BEB equipment of SPB network receive the first link state advertisement message from edge device；Wherein, wrap
Include the BMAC addresses and the BMAC ground as each network equipment for reaching the PBB networks of each network equipment of PBB networks
The BMAC addresses of the edge device of the next-hop of location；
Step 2, the BEB equipment of SPB network are according to the BMAC address list items and the PBB of the edge device for having generated
The BMAC addresses of each network equipment of network, generate the BMAC address list items of each network equipment of the PBB networks；Wherein,
The BMAC of the B-VID and interface of the BMAC address list items of each network equipment of the PBB networks and the edge device for generating
The B-VID of address list item is identical with interface.
By the embodiment, can generate on the BEB equipment of SPB network to the network equipment of PBB networks and forward data
The list item of message, for the data message of the BEB device forwards PBB network equipments of SPB.
As shown in figure 1, embodiment of the present invention network 100 is by the network equipment 101,111-113 and network equipment 121-123
Constitute.In Fig. 1, the network equipment 101 has run PBB agreements and SPB agreements.Network equipment 111-113 runs SPB agreements, net
Network equipment 121 and 122 runs PBB agreements.The network equipment 101,111-113 constitutes the SPBN of network 100, the network equipment 101,
121 and 122 PBBN for constituting network 100, the network equipment 101 is the edge device of SPBN and PBBN.
The network equipment 101,111 and 112 is the BCB equipment of SPBN, and the network equipment 113 is the BEB equipment of SPBN.
In PBBN, the network equipment 101,121 is BCB equipment, and the network equipment 122 is BEB equipment.
The network equipment 101,111-113 calculates this equipment to other SPBN equipment according to the synchronous LSDB of the whole network in SPBN
Shortest path, generates BMAC list items.For example, the shortest path of the arrival network equipment 101 that the network equipment 113 is calculated according to LSDB
It is network equipment 113->Network equipment 111->The network equipment 101.The BMAC tables of the network equipment 101 that the network equipment 113 is generated
Item includes：BMAC101, B-VID10 and interface；Wherein, BMAC101 is the BMAC addresses of the network equipment 111；B-VID10 is
In SPBN SPB VSI (virtual service instance, virtual service instance) B-VID (Backbone VLAN ID,
Key VLAN ID), the interface in the BMAC list items is the shortest path that the network equipment 113 reaches the network equipment 101
On port.
The network equipment 101 is by the BMAC of the PBBN network equipments 121 and 123 by the SPB IS-IS shown in Fig. 2
(Intermediate System to Intermediate System Routing Protocol, intermediate system is to middle system
System routing protocol) message by connection the network equipment 111 and 112 port send.
As shown in Fig. 2 the present embodiment, the code of the link state advertisement message by extending SPB Intermediate System to Intermediate Systems
(code) field, is distributed to the BMAC addresses of the network equipment in PBBN 121 and 122 as Import (introducing) BMAC addresses
Network equipment 111-113 in SPBN networks.
As shown in figure 3, length field identifies the word of BMAC and Source BMAC below in link state advertisement message
The byte number of joint number, i.e. BMAC121, BMAC122 and BMAC101；Two Import BMAC fields are respectively the networks for introducing
The BAMC addresses of equipment 121 and 122；Source BMAC fields are the BMAC of the edge device 101 of SPBN networks and PBBN networks
Address.
In the present embodiment, the number of the Import BMAC fields of the link advertisement messages of the introducing BMAC addresses shown in Fig. 3
It is related to the number of the BMAC addresses of the network equipment for needing to introduce SPBN.When the newly-increased BEB equipment/BCB equipment of PBBN networks,
The network equipment 101 resends link advertisement messages, by newly-increased Import BMAC address fields or reduction Import BMAC
Address field, it would be desirable to which the BMAC of the network equipment is distributed to the network equipment of SPBN in the PBBN networks being actually introduced into.
The network equipment 111 and 112 receives carry the link state advertisement message for introducing BMAC addresses respectively, according to Source
BMAC fields and Import BMAC fields, learn to BMAC101 the BMAC ground for being BMAC121 and BMAC122 next-hop devices
Location, generates the BMAC list items of BMAC121 and BMAC122, i.e., newly-generated BMAC121 list items and the B-VID of BMAC122 list items and
Interface is identical with the B-VID and interface of the BMAC101 list items for generating.
The network equipment 111 and 112 sends the carrying for receiving and introduces BMAC ground by the port of the connection network equipment 113 respectively
The link state advertisement message of location.
The network equipment 113 receives carry the link state advertisement message for introducing BMAC addresses respectively, according to Source BMAC
Field and Import BMAC fields, learn to BMAC101 the BMAC addresses for being BMAC121 and BMAC122 next-hop devices,
Generate the BMAC list items of BMAC121 and BMAC 122, i.e., newly-generated BMAC121 list items and the B-VID of BMAC122 list items and connect
Mouth is identical with the B-VID and interface of the BMAC101 list items for generating.
Fig. 3 show the embodiment of the present invention and provides carrying introducing I-SID (Backbone service instance
Identification, backbone network service instance identification) link state advertisement message schematic diagram.In Fig. 3, code word segment mark
It is Import VSI (introducing Virtual Switch Instance) to have known expansion type, by the I-SID100 of the network equipment in PBBN 121 and 122
The network equipment 111-113 being distributed in SPBN networks.In the embodiment of the present invention, in PBBN networks and SPBN networks intercommunication is needed
The network equipment belong to same Virtual Switch Instance, therefore I-SID marks are I-SID100.
As shown in figure 3, length field identifies I-SID, Destination below in link state advertisement message
The byte number of BMAC and Source BMAC；The BMAC addresses that Destination BMAC fields are carried are to need and SPBN networks
Interior BEB equipment 103 creates the BMAC ground of BEB equipment 122 in the PBBN networks of virtual link PW (Pseudo wires, pseudo-wire)
Location；Source BMAC fields are the BMAC addresses of the edge device 101 of SPBN networks and PBBN networks.
In the present embodiment, the number of the Destination BMAC fields of the link advertisement messages of the introducing VSI shown in Fig. 3
It is related to the number of BEB equipment in VSI in PBBN networks.The I-SID fields of the link advertisement messages of the introducing VSI shown in Fig. 3
Number it is related to the number of VSI in PBBN networks.As the newly-increased VSI of PBBN networks or when deleting certain VSI, the network equipment
101 resend the link advertisement messages for introducing I-SID, by newly-increased I-SID address fields or reduction I-SID fields, need to
The VSI of the network equipment is distributed to the network equipment of SPBN in the PBBN networks to be actually introduced into.When in the VSI of PBBN networks
When BEB equipment increases or deletes, the network equipment 101 resends the link advertisement messages for introducing I-SID, by newly-increased or reduction
Destination BMAC fields, it would be desirable to which the BMAC addresses of the BEB equipment of VSI are distributed in the PBBN networks being actually introduced into
The network equipment of SPBN.So, BEB equipment sets up in connection PBBN networks BEB in same VSI in the VSI in SPBN networks
PW。
The network equipment 111 and 112 receive respectively carry introduce I-SID link state advertisement message, preservation receive this
It is a little to carry the link state advertisement message for introducing I-SID.The network equipment 111 and 112 is respectively by the end of the connection network equipment 113
Mouth sends the carrying for receiving and introduces I-SID link state advertisement messages.
The network equipment 113 receives carry the link state advertisement message for introducing I-SID respectively, learns in PBBN networks
The I-SID100 of BEB equipment, the BMAC addresses for creating the next-hop of the PW and PW of the connection network equipment 122 are edge devices
The BMAC101 that BMAC101, i.e. Source BMAC fields are carried.
The network equipment 113 sends the probe messages of M-IN-M encapsulation based on the PW of the connection network equipment 122, wherein, B-SA
For the BMAC113 of the network equipment 113, B-DA is the BMAC122 of the network equipment 122, and B-VID is B-VID10；I-SID is 110.
The network equipment 113 finds the BMAC address list items of BMAC 122 and B-VID10 matchings, according to connecing for matching list item
Mouth sends the probe messages of M-IN-M encapsulation to the network equipment 111.The network equipment 111 finds BMAC 113 and B-VID10
The BMAC address list items matched somebody with somebody, are filtered by source and are checked, find the BMAC address list items of BMAC122 and B-VID10 matchings, according to
The interface of matching list item sends the probe messages of M-IN-M encapsulation to the network equipment 101.
The network equipment 101 can pass through the BMAC122 list items for having learnt, and the probe messages that M-IN-M is encapsulated send network and set
Standby 122.The probe messages that the network equipment 122 encapsulates the M-IN-M for receiving create connection network and set as data message process
Standby 113 PW.B-DA (Backbones of the BEB122 according to the outer layer of the probe messages of the M-IN-M encapsulation for receiving
Destination MAC, backbone network purpose MAC) address and B-VID learning networks equipment 113 BMAC113.
When the network equipment 122 sends broadcasting packet in the VSI in PBBN, the network equipment 122 is according further to connection net
The PW of network equipment 103 is encapsulated as broadcasting packet wherein, and B-SA is the BMAC122 of the network equipment 122, and B-DA is the network equipment
113 BMAC113, B-VID are B-VID10；I-SID is 110.
The network equipment 122 finds the BMAC address list items of BMAC 113 and B-VID10 matchings, according to connecing for matching list item
Mouthful the broadcasting packet of M-IN-M encapsulation is sent to the network equipment 121, the network equipment 121 learns BMAC list items, according to learning
BMAC101 list items send the broadcasting packet of M-IN-M encapsulation to the network equipment 101.The network equipment 111 finds the Hes of BMAC 122
The BMAC address list items of B-VID10 matchings, set according to the broadcasting packet that the interface of matching list item sends M-IN-M encapsulation to network
Standby 111.The network equipment 111 finds the BMAC address list items of BMAC 122 and B-VID10 matchings, is filtered by source and is checked, looks into
The BMAC address list items of BMAC113 and B-VID10 matchings are found, the detection of M-IN-M encapsulation is sent according to the interface of matching list item
Message is to the network equipment 113.
Fig. 4 show the schematic diagram of another network 400 provided in an embodiment of the present invention.Network 400 by the network equipment 401,
402nd, 411-413 and network equipment 421-422 is constituted.In Fig. 4, the network equipment 401 and 402 has run PBB agreements and SPB
Agreement.Network equipment 411-413 runs SPB agreements, the operation PBB agreements of the network equipment 421 and 422.The network equipment 401,402,
411-413 constitutes the SPBN of network 400, and the network equipment 401,421 and 422 constitutes the PBBN of network 400, the network equipment
401 and 402 is the edge device of SPBN and PBBN.
The network equipment 401,411 and 412 is the BCB equipment of SPBN, and the network equipment 413 is the BEB equipment of SPBN.
In PBBN, the network equipment 401,421 is BCB equipment, and the network equipment 422 is BEB equipment.
The network equipment 401 and 402 sends and carries the link state advertisement message for introducing BMAC addresses, network equipment 411-
413 receive the link state advertisement message that these introduce BMAC addresses, can be processed according to predetermined regular selection and be set come automatic network
Standby 401 link state advertisement messages for introducing BMAC addresses.So network equipment 411-413 is using the network equipment 401 as under
One jumps the BMAC address list items generated with regard to the network equipment 421 and 422.Equally, the network equipment 401 and 402 sends to carry and introduces
The link state advertisement message of I-SID, network equipment 411-413 can select to process from the network equipment according to predetermined rule
401 carrying introduces the link state advertisement message of I-SID.Network equipment 411-413 can disappear according to these LSAs
The Source BMAC addresses of breath, selecting the link state advertisement message of the Source BMAC addresses with maximum or minimum is carried out
Process.
As shown in figure 5, the device for generating forwarding-table item provided in an embodiment of the present invention is given birth to including receiving unit 501, list item
Into unit 502, tunnel signal generating unit 503 and transmitting element 504.The dress child of the generation forwarding-table item shown in Fig. 5 can be with SPB
The BEB equipment of network.
Receiving unit 501, receives the first link state advertisement message from edge device；Wherein, including PBB networks
The BMAC addresses of each network equipment and as reach PBB networks each network equipment BMAC addresses next-hop side
The BMAC addresses of boundary's equipment.List item signal generating unit 502, according to the BMAC address list items and PBB nets of the edge device for having generated
The BMAC addresses of each network equipment of network, generate the BMAC address list items of each network equipment of PBB networks；Wherein, PBB nets
The B-VID and interface of the BMAC address list items of each network equipment of network and the BMAC address list items of the edge device for generating
B-VID is identical with interface.
Receiving unit 501, receives the second link state advertisement message from edge device；Wherein, including PBB networks
Network in the BMAC addresses of the interior network equipments as BEB of identical VSI and the identical VSI of arrival PBB networks as BEB sets
The BMAC addresses of the edge device of standby next-hop.Tunnel building unit 503, sets up conduct in the identical VSI of connection PBB networks
Pseudo-wire PW of the network equipment of BEB.
Transmitting element 504, according to pseudo-wire the probe messages of M-in-M encapsulation are sent；According to the identical virtual clothes of PBB networks
The BMAC address list items matched as the BMAC addresses of the network equipment of BEB in pragmatic example VSI, the detection report that M-in-M is encapsulated
Text is sent to edge device, wherein, the B-DA of the probe messages of M-in-M encapsulation is the net in the identical VSI of PBB networks as BEB
The BMAC addresses of network equipment.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (6)
1. it is a kind of generate forwarding-table item method, it is characterised in that be applied to the BEB equipment of shortest path bridging SPB network, institute
The method of stating includes：
Receive the first link state advertisement message from edge device；Wherein, including PBB networks each network equipment
BMAC addresses and as each network equipment for reaching the PBB networks next-hop the edge device BMAC ground
Location；
According to the BMAC of each network equipment of the BMAC address list items and the PBB networks of the edge device for having generated
Address, generates the BMAC address list items of each network equipment of the PBB networks；Wherein, each network of the PBB networks sets
The B-VID and interface of standby BMAC address list items and the B-VID of the BMAC address list items of the edge device for generating and connect
Mouth is identical.
2. method according to claim 1, it is characterised in that methods described includes：
Receive the second link state advertisement message from edge device；Wherein, including the PBB networks identical Virtual Service
As the net of BEB in the BMAC addresses of the interior network equipments as BEB of example VSI and the identical VSI of the arrival PBB networks
The BMAC addresses of the edge device of the next-hop of network equipment；
Set up pseudo-wire PW of the network equipment in the identical VSI of the connection PBB networks as BEB.
3. method according to claim 2, it is characterised in that methods described also includes,
The probe messages of M-in-M encapsulation are sent according to the pseudo-wire；Wherein B-DA is conduct in the identical VSI of the PBB networks
The BMAC addresses of the network equipment of BEB；
According to in the identical VSI of the PBB networks as BEB the network equipment BMAC addresses matching BMAC address tables
, the probe messages that the M-in-M is encapsulated are sent to into the edge device, the edge device is sent in the PBB networks
As the network equipment of BEB in the identical VSI of the probe messages to the PBB networks of the M-in-M encapsulation.
4. it is a kind of generate forwarding-table item device, it is characterised in that be applied to the BEB equipment of shortest path bridging SPB network, institute
Stating device includes：
Receiving unit, receives the first link state advertisement message from edge device；Wherein, including PBB networks each net
The BMAC addresses of network equipment and as each network equipment for reaching the PBB networks BMAC addresses next-hop it is described
The BMAC addresses of edge device；
List item signal generating unit, according to the BMAC address list items of the edge device for having generated and the PBB networks each
The BMAC addresses of the network equipment, generate the BMAC address list items of each network equipment of the PBB networks；Wherein, the PBB nets
The BMAC address tables of the B-VID and interface of the BMAC address list items of each network equipment of network and the edge device for generating
The B-VID of item is identical with interface.
5. device according to claim 4, it is characterised in that described device also includes：Tunnel building unit；
The receiving unit, receives the second link state advertisement message from edge device；Wherein, including the PBB networks
Identical virtual service instance VSI in as BEB the network equipment BMAC addresses and reach the identical of the PBB networks
The BMAC addresses of the edge device of the next-hop of the interior network equipments as BEB of VSI；
The tunnel building unit, sets up pseudo-wire PW of the network equipment in the identical VSI of the connection PBB networks as BEB.
6. device according to claim 5, it is characterised in that described device also includes：Transmitting element；
The transmitting element, according to the pseudo-wire probe messages of M-in-M encapsulation are sent；According to identical with the PBB networks
The BMAC address list items matched as the BMAC addresses of the network equipment of BEB in VSI, the probe messages that the M-in-M is encapsulated
The edge device is sent to, wherein, the B-DA of the probe messages of the M-in-M encapsulation is in the identical VSI of the PBB networks
As the BMAC addresses of the network equipment of BEB.
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| CN103973575A (en) | 2014-08-06 |
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