A method of providing extra traffic paths in a communication network comprising at least two protection channels associated to respective transmission channels, each of said at least two protection channels admitting an active state for carrying, in the presence of a failure in said associated transmission channel, traffic to be carried by the associated transmission channel and a stand-by state, wherein the protection channel is adapted to carry extra traffic, comprising a step of running said at least two protection channels in a sub-network connection protection scheme, whereby one of said at least two protection channels in said stand-by state is adapted to ensure recovery of extra traffic carried by the other of said at least two protection channels while one of the following conditions is met:
- said other of said at least two protection channels is switched to said active state, and
- said other of said at least two protection channels is subject to failure.