Method, apparatus and system for dual-homing protection switching

摘要

The invention discloses a method for dual-homing protection switching. The method includes: when the bidirectional forwarding detection (BFD) state of a Pseudo Wire (PW) is DOWN, the Provider Edge (PE) disenabling the Ethernet Operation, Administration and Maintenance (OAM) function of a port connected with a Customer Edge (CE); and the CE which has started a master and standby link switching function switching the service traffic to a standby link. The invention also provides corresponding apparatus and system. The invention reduces the influence of network failure on the service, decreases service unavailable probability and improves the service reliability.

主权项

1. A method for dual-homing protection switching, comprising:
a Provider Edge (PE) device, when detecting a bidirectional forwarding detection (BFD) state of a Pseudo Wire (PW) is DOWN, disenabling an Ethernet Operation, Administration, Maintenance (OAM) function of a port of the PE device which is connected with a local Customer Edge (CE) device, wherein the Ethernet OAM function is started between the PE device and the local CE device; and if the local CE device, which has a master and standby link switching function, detects that the Ethernet OAM function of the port of the PE device which is connected with the local CE device is disenable, switching service traffic from a master link connected with the PE to a standby link connected with another PE through a Multi-chassis Link Aggregation Group (MC-LAG) function to sense by an attachment circuit (AC) access of the local CE device changes of a virtual circuit (VC) state at the PE device side in time in a VPLS environment; wherein, the BFD state of the PW of the PE device is associated with the Ethernet OAM function started between the PE device and the local CE device, and the Ethernet OAM function started between the PE device and the local CE device is associated with the MC-LAG function of the local CE device.