A method and apparatus for communicating and utilizing control plane
congestion information in a communication network that utilizes a source
routed signaling protocol is presented. When control plane congestion is
detected at a network element within the communication network, a
congestion notification message is generated corresponding to the
detected control plane congestion. The congestion notification is then
provided to at least one additional network element within the
communications network. The at least one additional network element can
then utilize this knowledge of the congestion within the network to
perform various network functions, including the routing a connection
set-up message.