Method and device for realizing quick re-routing in MPLS VPN

A routing and fast technology, applied in the direction of digital transmission system, electrical components, transmission system, etc., can solve the problems of slow convergence speed of remote ASBR routing, slow convergence speed of ASBR routing, and failure to meet user needs, etc., to achieve fast rerouting , improve the convergence speed, and meet the user's needs

Inactive Publication Date: 2008-08-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] It can be seen that the convergence speed of the existing remote ASBR route is very slow, which is unacceptable to users for services with high real-time requirements such as voice and video
[0024] In summary, in the process of implementing the present invention, the inventors found that in the MPLS VPN cross-domain application scenario, when problems such as inter-domain link failures and ASBR equipment failures occur, the ASBR route convergence speed is relatively slow, and for real-time services , seriously affecting its quality of service (Quality of Service, QoS), unable to meet user needs

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  • Method and device for realizing quick re-routing in MPLS VPN
  • Method and device for realizing quick re-routing in MPLS VPN
  • Method and device for realizing quick re-routing in MPLS VPN

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Embodiment Construction

[0047] A method for implementing fast rerouting in an MPLS VPN proposed by an embodiment of the present invention generates active and standby Label Switch Paths (Label Switch Path, LSP) from two routes and sends them to forwarding table entries at the same time, Select the forwarding link by querying the state of the active LSP. When the active LSP fails, immediately switch the traffic to the standby LSP to achieve fast rerouting. The specific implementation includes at least: routing configuration, routing selection when forwarding traffic, Route convergence in the event of a failure.

[0048] Referring to FIG. 5 , it illustrates a flow chart of routing configuration in a method for implementing fast rerouting in an MPLS VPN according to an embodiment of the present invention, specifically including:

[0049] Step S11, the border routing device receives at least two VPN routes, one VPN route is used as the main route, and one VPN route is used as the backup route;

[0050] ...

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Abstract

The invention discloses a method for realizing rapid rerouting in a multiple protocol label switch virtual private network (MPLS VPN), which comprises the following steps that: two routes acquired by a border router and labels respectively generate a primary label switch path (Label Switch Path, LSP) and a standby LSP; the primary LSP and the standby LSP are handed down to a forwarding table simultaneously; whether the state of the primary LSP is effective is queried; if yes, the primary LSP is used to transmit flow rate; otherwise, the standby LSP is used to transmit flow rate. Accordingly, the invention also discloses route equipment; the method for realizing rapid reroute in MPLS VPN and the equipment can realize the rapid reroute, achieve rapid operation convergence when the equipment has fault and improve the QoS of real-time operation.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to a method for realizing fast rerouting by a border router in a multi-protocol label switching virtual private network and a routing device. Background technique [0002] With the development of network technology, Multi-Protocol Label Switching (MPLS) virtual private network (Virtual Private Network, VPN) is widely used in metropolitan area networks and backbone networks, except for carrying VPN users and large customers It is also used to bear the key services of telecommunications itself such as the third generation mobile communication (3G) and softswitch. Due to the development of more and more services, operators pay more and more attention to VPN cross-domain requirements. [0003] In the MPLS VPN cross-domain application scenario, when problems such as inter-domain link failures and autonomous system boundary router (Autonomous System Boundary Router, ASBR) equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
CPCH04L45/04H04L45/22H04L45/28H04L45/50
Inventor 李鉴吕鸿姜玉萍
Owner HUAWEI TECH CO LTD
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