Patent ID: 8117337

Claim:
A method for implementing Link Pass Through in a point-to-multipoint network, wherein the network comprises an access gate, an access device, a first aggregation device, a second aggregation device, an active router and a standby router, the access gate being connected to the active router via the access device and the first aggregation device in an active link, and being connected to the standby router via the access device and the second aggregation device in a standby link; wherein the method comprises: detecting, by the first aggregation device, a failure occurrence in the active link between the access device and the first aggregation device or between the first aggregation device and the active router; when the first aggregation device detects the failure occurrence in the active link between the first aggregation device and the access device or between the first aggregation device and the active router, sending, by the first aggregation device, a first link status notification to the access device; breaking, by the access device, a section of the active link between the access device and the access gate after receiving the first link status notification from the first aggregation device; and enabling, by the access gate, the standby link to conduct communication.