Patent ID: 9559989
Date: 2017-01-31
CPC Classifications: H04L

Claim:
1. A method for use in a computer network, the computer network comprising a stack device and a plurality of network devices, each network device of the plurality being connected to the stack device via a respective aggregation link comprising a plurality of member links, the stack device comprising a first stack member and a second stack member connected to the first stack member via a stack link, the method comprising: forming a correspondence between a first route and a first stack member, the first route being used by the first stack member for forwarding traffic from a first network device to a second network device of the plurality and comprising a member link via which the traffic is forwarded from the first stack member; upon detecting a link problem in the member link of the first route, finding the first route and identifying the first stack member based on the correspondence; and sending traffic information to cause the first network device to migrate at least a proportion of the traffic to have been forwarded via the first route to a route that does not include the link having a link problem only if determined that the first stack member has only one link port at an aggregation link interface between the first stack member and an aggregation link containing the link having a link problem.