Patent ID: 9231821
Filing Date: 2016-01-05
CPC Classification: H04L

Claim Text:
1. A system for Protocol Independent Multicast (PIM) virtual link aggregation group (vLAG) fast link failover recovery, the system comprising: a network comprising a first vLAG switch connected to a second vLAG switch by an inter-switch link (ISL), the first vLAG switch connected to an upstream network device by a failed link and the second vLAG switch connected to the upstream network device by a functional link; wherein to recover from the failed link, the first vLAG switch transmits a ROUTEUPDATE message to the second vLAG switch upon the ISL that instructs the second vLAG switch to receive data traffic from the upstream network device and forward the data traffic to the first vLAG switch upon the ISL; wherein the second vLAG switch is instructed by the upstream network device that it is implemented in a next best route from the upstream network device to the first vLAG switch and transmits a NEWSOURCE message to the first vLAG switch upon the ISL, and; wherein receipt of the NEWSOURCE message causes the first vLAG switch to transmit the ROUTEUPDATE message to the second vLAG switch upon the ISL.