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

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...

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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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