Looped network failure processing method, looped network and operator backbone equipment

Abstract

The embodiment of the invention discloses a method for treating the failure of a ring network, which includes the steps that: when a main flow engineering tunnel in a ring network has a failure, the entry operator key equipment of the ring network transmits data to a standby flow engineering tunnel which has converse direction with the main flow engineering tunnel. The standby flow engineering tunnel forms a ring loop by all the edge equipment and the key equipment of the operator. The embodiment of the invention also discloses the corresponding ring network and the operator key equipment. The application of the embodiment of the invention can avoid exchange flow when the key TE tunnel in the ring network suffers the failure.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a ring network failure processing method, ring network and operator backbone equipment. Background technique [0002] A virtual private network (VPN, Virtual Private Network) is a virtual private communication network established in a public network by a service provider (ISP, Internet Service Provider) and a network service provider (NSP, Network Service Provider); multi-protocol label switching ( MPLS, Multi-protocolLabel Switching) VPN is a virtual private network established on an MPLS network. [0003] In the prior art, a three-layer ring network is often deployed in a metropolitan area network to carry out MPLS VPN services. Common MPLS domains such as figure 1 Shown: [0004] Each ring contains several provider edge (PE, Provider Edge) devices and at least one provider backbone (P, Provider) device. Each PE device that constructs the ring network has two p...

AI Technical Summary

Problems solved by technology

[0011] When a link failure occurs in the ring network, although the data flow is switched to the backup tunnel and forwarded to the end point, the traffic is turned around, such as figure 2 As shown, it is necessary to repeatedly pass through P1 and PE1, which will inevitably lead to a waste of precious bandwidth, and at the same time increase the burden on the device, which will easily lead to traffic congestion.

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