Method and device for coordinating and switching layer 2 and layer 3 virtual private networks in bridging apparatus

Abstract

The present invention discloses a method and device for coordinating and switching layer 2 and layer 3 virtual private networks in a bridging apparatus. The method includes: establishing a tunnel between a main bridging node and a backup bridging node thereof of the layer 2 and layer 3 virtual private networks for carrying a layer 3 virtual private network (L3VPN) business; establishing a protective tunnel at the L3VPN via a layer 3 looped network; and when a breaking point exists in links on a converging ring hung beneath the main bridging node and between the main bridging node and the backup bridging node thereof of the layer 2 and layer 3 virtual private networks, detecting an IP address segment which is route inaccessible caused by the breaking point; starting, by the main bridging node, fast reroute VPN FRR switching, and switching the business to the backup bridging node via the protective tunnel. At the same time, the present invention further discloses a device for coordinating and switching layer 2 and layer 3 virtual private networks in a bridging apparatus. According to the present invention, the L2VPN and L3VPN protection linkage can be achieved to ensure normal operation of the business.

Description

technical field [0001] The invention relates to network switching technology in the field of communication, in particular to a method and device for coordinated switching of a second-layer and third-layer virtual private network in a bridging device. Background technique [0002] The existing packet transport network (PTN, Packet Transport Network) architecture is generally composed of a backbone ring, a convergence ring and an access ring or an access link. Among them, the backbone ring is a ring structure composed of several backbone nodes connected in series; the convergence ring It is a ring structure composed of at least one backbone node on the same backbone ring connected in series with several aggregation nodes; an access ring is a ring structure composed of a backbone node or one or two aggregation nodes connected in series with several access nodes , the access ring is usually divided into a dual-homing access ring and a single aggregation node access ring; the acc...

AI Technical Summary

Problems solved by technology

[0006] In the existing PTN-carrying LTE service network protection technology, there is a lack of linkage mechanism between L2VPN and L3VPN protection, such as figure 2 As shown, a breakpoint occurs on aggregation ring 1 connected to L2L3 bridge node PE3, and a breakpoint occurs on the link between bridge node PE3 and its backup bridge node PE4. At this time, because in the L2VPN network, the primary bridge node PE3 The downlink traffic of the LTE network cannot be forwarded to the LTE base station, but the fault in the L2VPN network cannot be detected within the scope of the L3VPN, and the downlink traffic is still sent to PE3, which will cause the downlink traffic on the access ring connected to the convergence ring 1 to be interrupted

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