CN100563194C - The method for building up of LSP - Google Patents
The method for building up of LSP Download PDFInfo
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Abstract
The present invention is the method for building up of a kind of LSP, and described method comprises that the upstream equipment of setting up each territory points to LSP in the territory of destination address in its territory, and wherein, described method further comprises, between the equipment of enabling LDP between the territory by the territory between LDP set up LSP between the territory; Be connected then in the described territory that LSP constitutes complete LSP between LSP and territory.The invention has the advantages that on cross-domain PE equipment and only use the LDP agreement to set up LSP, therefore can provide LSP solution between more territory, reduce the networking restriction; Simultaneously, the present invention realizes the automatic distribution of label, reduces the label distribution quantity between the territory simultaneously, helps network control and management; Simultaneously, the invention enables the distribution of LDP label to be totally independent of the study of Routing Protocol, and can avoid the burden that equipment is handled for a large amount of label informations between the territory; And the learning equipment that the present invention need not in all territories is set up the overseas routing iinformation of LSP, so helps the management and the control of inter-domain routing.
Description
Technical field
The invention belongs to computer network field, relate to a kind of LSP (Label Switch Path, the label switching tunnel) method for building up, the method for building up that particularly relates to LSP between a kind of territory, described method is mainly used in based on the Virtual Private Network of MPLS (Multi-Protocol Label Switching) technology (VPN, Virtual Private Network).
Background technology
Along with scope of the enterprise enlarges gradually, long-distance user, telecommuting personnel, branch, affiliate also are being on the increase, the increase in demand of key business, occurred a kind ofly setting up the technology of dedicated network by public network (as Internet), this technology is exactly Virtual Private Network (VirtualPrivate Network).VPN integrates flexibility, fail safe, economy and autgmentability, can fully satisfy the demand of branch, mobile office secure communication.In North America and Europe, VPN has become a Network of quite popularizing.At present domestic VPN uses and mainly concentrates on large enterprise and industry user.Along with popularizing of broadband networks, networking region span is increasing in the carrier network, Virtual Private Network not only is confined to the networking of an operator inside, also can relate to the networking of different operators network, and interconnecting between the heterogeneous networks will use cross-domain virtual private network networking scheme.
The MPLS technology is to be used for improving the forwarding speed of router and the agreement that proposes at first, but since MPLS in present IP network Virtual Private Network and the performance in two technology of traffic engineering (Traffic Engineering), it becomes the major criterion that enlarges the IP network scale day by day.Because industry is used the Virtual Private Network based on the MPLS technology more and more widely, so need provide solution at cross-domain virtual private network networking based on the Virtual Private Network of MPLS technology.
Prior art provides that a kind of (Border Gateway Protocol BGP) solves the control method of setting up LSP between the territory based on the VPN of MPLS technology by Border Gateway Protocol.As shown in Figure 1, in the networking plan of the cross-domain multi-hop of BGP, PE1 is provider edge equipment (the Provider Edge that adheres to different two territories (AS#1 and AS#2) separately with PE2, PE) the VPN route on PE1 and the PE2 releases by the MULTIHOP-EBGP mode, receive a VPN route on the PE 1 such as PE2, its next jump and be 10.0.0.1, what need now is that the address of setting up clauses and subclauses on PE2 is the LSP of 10.0.0.1.
At first, PE 1 releases the network segment route 10.0.0.1/32 of the next hop address of VPN route, by (the Interior Gateway Protocol of the Interior Gateway Protocol in the territory, IGP) make the router in the territory can acquire described VPN route, described then VPN route in the AS# 1 territory according to LDP (Label Distribution Protocol, tag distribution protocol) (the Autonomous System Boundary Router of the autonomous domain border router in the AS# 1 territory, ASBR) ASBR1 sends label, set up the LSP between ASBR1 and the PE1 thus, need distribute a label L1 for LSP in the described territory, autonomous domain border router in ASBR1 and the AS# 2 territory (Autonomous System Boundary Router then, ASBR) ASBR2 sets up LSP, form between ASBR1 and the ASBR2 LSP thus based on BGP, then being connected based on the LSP based on LDP in the LSP of BGP and the above-mentioned AS#1 territory between ASBR1 and the ASBR2, form the LSP between ASBR2 and the PE1, ASBR2 is that described LSP distributes a label L2, after LSP between ASBR2 and PE1 sets up, and form the exchange message of label in this locality, then described label is distributed to PE equipment PE2 in the AS# 2 territory.
ASBR2 sends label according to LDP to PE2 in the AS# 2 territory, set up in the AS# 2 territory between PE2 and the ASBR2 LSP thus based on LDP, be connected the LSP in the AS# 2 territory between the LSP between ASBR2 and the PE1 and PE2 and the ASBR2 this moment, forms the LSP between PE2 and the PE1 thus.
Described LSP is different with LSP among the common MPLS VPN, and it shows that mainly the LSP in the AS# 2 territory has two-layer label, and the LSP in the AS# 1 territory has single layer label.In the two-layer label in tunnel, the label of internal layer be in the AS# 2 territory based on the LSP that points to PE1 between the ASBR2 of BGP and the PE2, and outer layer label is based on the LSP of LDP in the AS# 2 territory.
When message produces from PE2, except that the information of carrying the VPN label in each territory for example, also need to carry two-layer label: the label of internal layer be in the AS# 2 territory based on the LSP that points to PE1 between the ASBR2 of BGP and the PE2, and outer layer label is based on the LSP of LDP in the AS# 2 territory.After message entered ASBR2, ASBR2 peeled off the LSP label in the AS# 2 territory, in the remaining AS#2 territory based on the LSP of sensing PE1 between the ASBR2 of BGP and the PE2; After entering ASBR1, ASBR1 further peels off between ASBR1 and the ASBR2 LSP label based on BGP, based on the label of the LSP of LDP, is the forwarding process of common MPLS VPN afterwards in the only surplus AS#1 territory.
The shortcoming of this scheme is, the bgp protocol (MBGP-4) that PE and ASBR depend on expansion is set up the LSP between the territory, and because the MBGP-4 more complicated, though some equipment is supported bgp protocol, but do not support the MBGP-4 agreement expanded, even some two-layer VPN (for example, the MARTINI pattern is used less than bgp protocol in) the networking, so the above-mentioned control method of setting up LSP between the territory just is subjected to the restriction of application scenario at all.
In addition, prior art also provides another kind to set up the control method of LSP between the territory.As shown in Figure 2, described solution artificially is provided with static LSP on each equipment, include label, outgoing label, and outbound port is set up the lsp tunnel from PE2 to PE1 thus.
Therefore the shortcoming of this scheme is that this lsp tunnel belongs to configured tunneling technique, can not generate automatically by dynamic protocol, is unfavorable for maintenance and management, and this tunnel has exclusiveness in the territory simultaneously, can not with the public label in other tunnel, Internet resources are caused waste.
In addition, prior art also provides another to set up the control method of LSP between the territory.As shown in Figure 3, on the way all devices is all learnt the route of PE1 from PE1 to PE2, and PE1 initiatively upstream is distributed to the label of 10.0.0.1/32 then.Configuration LSP strategy on ASBR1, described strategy only to specify neighbours ASBR2 distribution specified circuit by label information, ASBR2 is the label of the route 10.0.0.1/32 that upstream is published to PE1 of hop-by-hop again, finally sets up the lsp tunnel from PE2 to PE1.
The shortcoming of this scheme has 2 points: the first, because all devices all will be learnt route on the PE1 on the way, therefore overseas route is introduced on all devices in the territory; The second, described solution need dispose complicated LSP strategy on ASBR, and described strategy needs the given filter rule, the IP address that its essence is still according to PE1 is configured, rather than carry out the control of label distribution automatically, and dispose comparatively very complicated, thus increased intractability.
Summary of the invention
At the defective of above-mentioned prior art, one object of the present invention is to provide the method for building up of a kind of LSP, and described method can not be subjected to the restriction of application scenario to set up LSP between the territory.Simultaneously, another object of the present invention is to provide the method for building up of a kind of LSP, and described method can be set up LSP between the territory automatically by simple dynamic protocol, simplifies policy configurations and alleviates facility load.
In view of the foregoing invention purpose, the present invention is the method for building up of a kind of LSP, described method comprises that the upstream equipment of setting up each territory points to LSP in the territory of destination address in its territory, wherein, described method further comprises, between the equipment of enabling LDP between the territory by the territory between LDP set up LSP between the territory, LDP is the LDP agreement of enabling between the equipment between two territories between described territory; Be connected then in the described territory that LSP constitutes complete LSP between LSP and territory; Wherein, described between the equipment of enabling LDP between the territory by the territory between LDP set up that the step of LSP comprises following substep between the territory:
The equipment that the equipment that step S1. enables the upstream LDP between the territory is enabled LDP between the territory downstream sends the label request message;
Step S2. enables described upstream that the equipment of LDP receives the LSP label that the sensing destination address that the equipment of LDP sends between the territory is enabled in described downstream between the territory;
Step S3. sets up described upstream and enables LSP between the territory of pointing to described destination address between the equipment of LDP between the territory and the equipment that LDP between the territory is enabled in described downstream.
The method for building up of the LSP of technical conceive according to a preferred embodiment of the invention wherein, after enabling the equipment of LDP between the territory and receive the label request message that source device sends in the upstream, carries out step S1.
The method for building up of the LSP of technical conceive according to a preferred embodiment of the invention wherein, in step S3, does not receive that described downstream enables the LSP label that the equipment of LDP between the territory sends if the equipment of LDP between the territory is enabled in described upstream, then need not set up LSP between the territory.
The method for building up of the LSP of technical conceive according to a preferred embodiment of the invention, wherein, after LSP between described territory sets up, thereby the equipment LSP in the end territory, described source of the described destination address of described source device transmission tag response message formation sensing of LDP between the territory is enabled in described upstream.
The method for building up of the LSP of technical conceive according to a preferred embodiment of the invention, wherein, in the process of LSP, the described equipment of enabling LDP between the territory does not initiatively send the LSP label to overseas equipment in setting up the territory.
The method for building up of the LSP of technical conceive according to a preferred embodiment of the invention, wherein, the described equipment of enabling LDP between the territory is ASBR.
In addition, the present invention also provides a kind of data forwarding method based on LSP, and the complete LSP based on above-mentioned is characterized in that, said method comprising the steps of:
Step SS1. source device E-Packets, and carries label for described message, enables LSP label in the end territory, source of equipment of LDP between the territory comprising directed upstream and points to LSP label in the end territory, source of destination address;
Step SS2. enables described upstream that the equipment of LDP receives described message between the territory, peel off described directed upstream and enable LSP label in the end territory, source of equipment of LDP between the territory, transfer LSP label in the end territory, described source of sensing destination address between the territory of pointing to destination address LSP label, and the device forwards of enabling LDP between the territory downstream;
Step SS3. enables in described downstream after the equipment of LDP receives described message between the territory, transfers the LSP label that points between the territory of destination address in the destination territory of pointing to destination address LSP label, carries out forwarding in the territory afterwards.
The data forwarding method based on LSP of technical conceive according to a preferred embodiment of the invention, wherein, the described method layering described directed upstream that superposes is enabled LSP label in the end territory, source of LSP label and described sensing destination address in the end territory, source of equipment of LDP between the territory.
The data forwarding method based on LSP of technical conceive according to a preferred embodiment of the invention, wherein, the internal layer of LSP label LSP label in described directed upstream is enabled the end territory, source of equipment of LDP between the territory in the end territory, source of described sensing destination address.
The data forwarding method based on LSP of technical conceive according to a preferred embodiment of the invention, wherein, the described equipment of enabling LDP between the territory is ASBR.
The invention has the advantages that on cross-domain PE equipment only uses the LDP agreement to set up LSP, and needn't use expansion MBGP agreement, so that LSP solution between more territory to be provided, reduce owing to do not support to expand the networking that the MBGP agreement causes and limit, and in three-layer VPN and two-layer VPN networking, can use; Simultaneously, the present invention realizes the automatic distribution of label, reduces the label distribution quantity between the territory simultaneously, thereby alleviates the quantity of LSP and the burden of equipment, also helps network control and management; Simultaneously, make the distribution of LDP label be totally independent of the study of Routing Protocol, and can avoid the burden that equipment is handled for a large amount of label informations between the territory; And the learning equipment that the present invention need not in all territories is set up the overseas routing iinformation of LSP, and the overseas route that only needs ASBR and PE study to set up LSP gets final product, and therefore helps the management and the control of inter-domain routing.
Description of drawings
Fig. 1 is the schematic diagram based on the method for building up of the LDP of expansion and the LSP of BGP according to prior art;
Fig. 2 is the schematic diagram according to the method for building up of the static LSP of prior art;
Fig. 3 is the schematic diagram based on the method for building up of the LSP of LSP strategy according to prior art;
Fig. 4 is the schematic diagram according to the method for building up of the LSP based on LDP of the present invention;
Fig. 5 is the flow chart according to the method for building up of the LSP based on LDP of the present invention;
Fig. 6 is based on the schematic diagram of the data forwarding method of LSP of the present invention; And
Fig. 7 is based on the flow chart of the data forwarding method of LSP of the present invention.
Embodiment
Explain with reference to the accompanying drawings and introduce specific embodiments of the invention.
As shown in Figure 4, PE1 and PE2 are provider edge equipment (the Provider Edge that adheres to different two territory AS#1 and AS# 2 separately, PE), VPN route on it releases by the MULTIHOP-EBGP mode, receive a VPN route on the PE1 such as PE2, its next jumping is 10.0.0.1, the address that need set up clauses and subclauses at PE2 is the LSP of 10.0.0.1 now, therefore, AS# 2 is the territory, upstream in this specific embodiment, AS# 1 is the downstream domain in this specific embodiment, PE2 is the source end equipment in this specific embodiment, PE1 is the destination equipment in this specific embodiment, and what this specific embodiment was described is to set up a cross-domain LSP at source end equipment and destination equipment, thereby explanation the present invention sets up the complete skill scheme of LSP method.
In order to reach this purpose, at first need between per two equipment, enable the LDP agreement, the present invention simultaneously expands in the territory LDP agreement between LDP agreement and territory with LDP, autonomous domain border router (Autonomous System Boundary Router wherein, ASBR) enable LDP between the territory between ASBR1 and the ASBR2, enable LDP in the territory between other equipment, LDP uses the last two jump (PHP) technology in the territory; Simultaneously, LDP adopts initiatively distribution mode of downstream in the territory, and LDP adopts upstream active request distribution mode between the territory.
Then set up four LSP based on LDP, the LSP1 tunnel is the LSP that points to ASBR2 in the AS# 2 territory between PE2 and the ASBR2 (20.0.0.1/32), the LSP2 tunnel is the LSP that points to PE1 (10.0.0.1/32) in the AS# 2 territory between PE2 and the ASBR2, the LSP3 tunnel is the LSP that points to PE1 (10.0.0.1/32) between ASBR2 and the ASBR1, the LSP4 tunnel be in the AS# 1 territory between PE1 and the ASBR1 to the LSP of PE1 (10.0.0.1/32).
Wherein LSP1 and LSP2 superpose between PE2 and ASBR2, and LSP2 and LSP3 are connected on ASBR2, and LSP3 tunnel and LSP4 tunnel are connected on ASBR1, set up LSP thus between PE1 and PE2.
Below with reference to Fig. 4 and Fig. 5, explain concrete steps and the realization thereof of above-mentioned LSP method for building up in communication system in detail, and, explain data forwarding method based on described LSP with reference to Fig. 6 and Fig. 7, wherein, Fig. 4 is a schematic diagram of setting up the method for LSP based on LDP according to of the present invention; Fig. 5 sets up the flow chart of the method for LSP according to of the present invention based on LDP, and wherein step S1, S2 and S3 are the substep of step B; Fig. 6 is based on the schematic diagram of the data forwarding of LSP of the present invention; And Fig. 7 is based on the flow chart of the data forwarding of LSP of the present invention:
One, sets up LSP1 tunnel and LSP4 tunnel in the territory by LDP in the territory
At first, as Fig. 5 steps A, utilize existing LDP to set up LSP1 tunnel and LSP4 tunnel as LDP hop-by-hop in the territory, wherein, in the AS# 2 territory, PE2 is a upstream equipment, the destination is ASBR2 and in the AS# 1 territory, ASBR1 is a upstream equipment in its territory, and the destination is PE1 in its territory.Described territory inner tunnel set up in the process ASBR1 and ASBR2 only the equipment of other in the territory initiatively distribute label, and can initiatively not distribute label to overseas equipment.
In order to set up the LSP2 tunnel that arrives PE1 (10.0.0.1/32) between PE2 and the ASBR2, need system to be supported on two indirectly connected equipment and set up the session of LDP far-end, the prerequisite that this session is set up is the foundation in LSP1 tunnel, in case the LSP1 tunnel is set up, utilize then that the LDP agreement just can realize setting up the session of LDP far-end on two indirectly connected equipment in the common territory, owing on PE2, learn from ASBR2 to the overseas route of PE1 (10.0.0.1/32), so will be by the PE2 active be initiated to the label request message of PE1 (10.0.0.1/32) to ASBR2.
Two, set up LSP3 tunnel between the territory by LDP between the territory
Then, as Fig. 5 step B, ASBR2 receives that PE2 initiatively sends to the flow process of setting up that will trigger LSP3 tunnel between the territory behind the label request message of PE1 (10.0.0.1/32), and wherein step S1, S2 and S3 are the substep of described flow process.Setting up LSP3 tunnel between the territory by LDP between the territory need carry out between the equipment that starts LDP between the territory, and in the present embodiment, (Autonomous System Boundary Router ASBR) enables LDP between the territory to autonomous domain border router between ASBR1 and the ASBR2.
For the LSP3 tunnel, as LSP between the territory of pointing to PE1 between ASBR2 and the ASBR1, its method for building up, as shown in Figure 5 pass through the substep S1 that LDP between the territory sets up LSP between the territory, upstream AS BR2 ASBR1 downstream sends the label request message.Method for building up difference with LSP in the territory is, the LSP3 tunnel is not initiatively to issue ASBR2 (downstream initiatively) label by downstream ASBR1 to set up between described territory, but ASBR2 receive PE2 to the label request message of PE1 (10.0.0.1/32) time, ASBR2 finds that its next jumping to the route of PE1 (10.0.0.1/32) is ASBR1, thus, ASBR2 according to next of this route jump oppositely to ASBR1 equipment initiatively send the label request message.Judge that herein whether described route is that the condition of overseas route is not judged according to Routing Protocol, whether but start according to the virtual interface of next jumping of described route the LDP agreement is judged between the territory.
Shown in substep S2, ASBR1 receives after the label request message of overseas device A SBR2, sends the label of PE1 to ASBR2 then.
Shown in substep S3, ASBR2 receives the label of the PE1 that ASBR1 sends at last, promptly sets up LSP3 tunnel between the territory of pointing to PE1 between ASBR2 and the ASBR1.
If ASBR2 does not receive the label to PE1 that ASBR1 sends, prove that then described VPN route does not need to set up LSP between the territory, do not need the upstream PE 2 in the territory to send label information yet.
Three, be connected LSP1 tunnel and LSP3 tunnel and constitute the LSP2 tunnel
At last, step C as shown in Figure 5, after LSP3 tunnel between ASBR2 and the ASBR1 is set up, ASBR2 send to point to the tag response message of PE1 (10.0.0.1/32) to PE2, and PE2 has just set up the LSP2 tunnel after receiving the tag response message of the sensing PE1 (10.0.0.1/32) that ASBR2 sends.If PE2 does not receive the tag response message of the sensing PE1 (10.0.0.1/32) that ASBR2 sends, prove that then the LSP3 tunnel do not set up, therefore can not be established to the complete LSP of PE1.
Work as LSP1, LSP2, after LSP3 and LSP4 tunnel are set up respectively, the message that sends out from PE2 can carry two-layer LSP label, and internal layer is the label in LSP2 tunnel, and skin is the label in LSP1 tunnel, can flick off the label in LSP1 tunnel when arriving ASBR2, simultaneously the label that the label in LSP2 tunnel is transferred to the LSP3 tunnel is issued ASBR1, follows on ASBR1 the label that the label in LSP3 tunnel is transferred to the LSP4 tunnel and issues PE1, sets up LSP between the territory from PE2 to PE1 thus.
Four, based on the data forwarding method of complete LSP
Data forwarding method such as Figure 6 and Figure 7 based on LSP between the territory, at first as step SS1, when message produces from PE2, need press three layers of label, be respectively the routing tag Lv of VPN, based on the label L2 in LSP2 tunnel in the AS# 2 territory of the sensing PE1 of LDP, based on the label L1 in LSP1 tunnel in the AS# 2 territory of LDP.
Then as step SS2, when data arrive ASBR2, label L1 based on LSP1 tunnel in the AS# 2 territory of LDP is stripped from, remaining two-layer label is respectively the routing tag Lv of VPN and based on the label L2 in LSP2 tunnel in the AS# 2 territory of the sensing PE1 of LDP, and ASBR2 will transfer the label L3 based on LSP3 tunnel between the territory of LDP based on the label in LSP2 tunnel between the territory of LDP to.
Last as step SS3, data enter after the ASBR1, and the label of the LSP3 of LDP just transfers the label L4 based on LSP4 tunnel in the territory of LDP to, promptly are the forwarding process according to the virtual proprietary network of common MPLS of the routing tag Lv of VPN afterwards.
In the territory of the present invention between LDP and territory the difference of LDP be its application scenario and label distribution pattern.At first, LDP is mainly used in the territory mutual between the equipment in the territory, and LDP is mainly used between the territory mutual between the equipment between the territory, can distinguish in the territory LDP between LDP and territory by the different command word of configuration on equipment.Secondly, LDP adopts initiatively distribution mode of downstream in the territory, LDP adopts the distribution mode of upstream active request between the territory, ASBR not initiatively the label information route is published to overseas going, but issue label information to the opposite end after receiving overseas equipment request label information initiatively, the benefit of doing like this is promptly to realize the automatic distribution of label, has reduced the label distribution quantity between the territory simultaneously again, thereby alleviate the quantity of LSP and the burden of equipment, also help network control and management.
What need statement is that foregoing invention content and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as the qualification to protection range of the present invention.Those skilled in the art are in spirit of the present invention and principle, when doing various modifications, being equal to and replacing or improve.Protection scope of the present invention is as the criterion with appended claims.
Claims (10)
1. the method for building up of a LSP, described method comprises that the upstream equipment of setting up each territory points to LSP in the territory of destination address in its territory, it is characterized in that, described method further comprises, between the equipment of enabling LDP between the territory by the territory between LDP set up LSP between the territory, LDP is the LDP agreement of enabling between the equipment between two territories between described territory; Be connected then in the described territory that LSP constitutes complete LSP between LSP and territory; Wherein, described between the equipment of enabling LDP between the territory by the territory between LDP set up that the step of LSP comprises following substep between the territory:
The equipment that the equipment that step S1. enables the upstream LDP between the territory is enabled LDP between the territory downstream sends the label request message;
Step S2. enables described upstream that the equipment of LDP receives the LSP label that the sensing destination address that the equipment of LDP sends between the territory is enabled in described downstream between the territory;
Step S3. sets up described upstream and enables LSP between the territory of pointing to described destination address between the equipment of LDP between the territory and the equipment that LDP between the territory is enabled in described downstream.
2. the method for building up of LSP as claimed in claim 1 is characterized in that, after the label request message that upstream equipment that the equipment of LDP between the territory receives described each territory sends is enabled in described upstream, carries out step S1.
3. the method for building up of LSP as claimed in claim 1 is characterized in that, in step S3, does not receive that described downstream enables the LSP label that the equipment of LDP between the territory sends if the equipment of LDP between the territory is enabled in described upstream, then need not set up LSP between the territory.
4. the method for building up of LSP as claimed in claim 1, it is characterized in that, after LSP between described territory sets up, thereby the equipment LSP in the end territory, described source of the described destination address of upstream equipment transmission tag response message formation sensing in described each territory of LDP between the territory is enabled in described upstream.
5. the method for building up of LSP as claimed in claim 1 is characterized in that, in the process of LSP, the described equipment of enabling LDP between the territory does not initiatively send the LSP label to overseas equipment in setting up the territory.
6. as the method for building up of the arbitrary described LSP of claim 1 to 5, it is characterized in that the described equipment of enabling LDP between the territory is ASBR.
7. the data forwarding method based on LSP based on complete LSP as claimed in claim 1, is characterized in that, said method comprising the steps of:
Step SS1. source device E-Packets, and carries label for described message, enables LSP label in the end territory, source of equipment of LDP between the territory comprising directed upstream and points to LSP label in the end territory, source of destination address;
Step SS2. enables described upstream after the equipment of LDP receives described message between the territory, peel off described directed upstream and enable LSP label in the end territory, source of equipment of LDP between the territory, transfer LSP label in the end territory, described source of sensing destination address between the territory of pointing to destination address LSP label, and the device forwards of enabling LDP between the territory downstream;
Step SS3. enables in described downstream after the equipment of LDP receives described message between the territory, transfers the LSP label that points between the territory of destination address in the destination territory of pointing to destination address LSP label, carries out forwarding in the territory afterwards.
8. the data forwarding method based on LSP as claimed in claim 7 is characterized in that, the described method layering described directed upstream that superposes is enabled LSP label in the end territory, source of LSP label and described sensing destination address in the end territory, source of equipment of LDP between the territory.
9. the data forwarding method based on LSP as claimed in claim 8 is characterized in that, the internal layer of LSP label LSP label in described directed upstream is enabled the end territory, source of equipment of LDP between the territory in the end territory, source of described sensing destination address.
10. as the arbitrary described data forwarding method of claim 7 to 9, it is characterized in that the described equipment of enabling LDP between the territory is ASBR based on LSP.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387060B (en) * | 2010-08-31 | 2015-02-11 | 杭州华三通信技术有限公司 | Building method and device for label switched path tunnels |
| CN102355402B (en) * | 2011-08-03 | 2014-05-07 | 华为技术有限公司 | Method, system and router for establishing LSP (Label Switched Path) based on VPN (Virtual Private Network) route |
| CN105634940B (en) * | 2014-10-27 | 2020-06-16 | 中兴通讯股份有限公司 | SR information acquisition method and method for establishing segment routing network |
| CN108494684B (en) * | 2018-03-30 | 2021-01-26 | 新华三技术有限公司 | Method and device for establishing tunnel |
| CN110830352B (en) | 2018-08-07 | 2022-09-23 | 中兴通讯股份有限公司 | Method and device for realizing VPN cross-domain and boundary node |
| CN110958168B (en) * | 2018-09-26 | 2022-03-08 | 中兴通讯股份有限公司 | Cross-domain bidirectional tunnel creation method, communication method and device, and storage medium |
| CN111371686B (en) * | 2020-03-19 | 2023-01-24 | 刘奇峰 | Message forwarding method and device |
| CN113765803B (en) * | 2021-08-05 | 2023-10-24 | 新华三大数据技术有限公司 | Route release method and device and network equipment |
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2006
- 2006-11-02 CN CNB2006101436121A patent/CN100563194C/en not_active Expired - Fee Related
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| CN1968178A (en) | 2007-05-23 |
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