a node , of a group of nodes , may detect a failure on a first path ; establish a connection associated with a second path when the failure on the first path is detected ; store an identifier in a field in an overhead portion of a data frame when the failure on the first path is detected , the data frame including a payload portion that contains a client signal , the identifier instructing another one of the nodes to establish a connection associated with the second path ; and transmit the data frame to the other one of the nodes via the second path .