Patent ID: 9705786
Date: 2017-07-11
CPC Classifications: H04L

Claim:
1. A node, comprising: an input interface for receiving traffic from a first communication link; an output interface for transmitting traffic to a second communication link; a switch for communicating the traffic from the input interface to the output interface; and a control module controlling the input interface, the output interface, and the switch, the control module generating an advertising message including: a working path bandwidth demand; an identification of at least two communication links in a shared risk link group of the working path; and at least one protecting path and a bitmap indicative of failure of at least one first communication link in the shared risk link group that causes the at least one protecting path to be used, wherein the working path includes a first set of intermediate nodes and communication links, and wherein the at least one protecting path has a second set of intermediate nodes, the first set and the second set at least partially overlapping with one another, and wherein the at least one protecting path is a first protecting path, and wherein the advertising message further includes at least one second protecting path and a bitmap indicative of failure of at least one second communication link in the shared risk link group that causes the at least one second protecting path to be used.