Patent ID: 8036104
Filing Date: 2011-10-11
Classification: G06F,H04L

Abstract:
1. A method of operating an end node in a communications system including at least one network node and said end node, the method comprising: generating from Mobile IP signals directed to said end node or transmitted by said end node, a list of network nodes identifying network nodes used in routing signals to or from said end node, said Mobile IP signals including at least one of a Mobile IP agent solicitation message, a Mobile IP agent advertisement message, a Mobile IP registration message and a Mobile IP registration reply message; receiving at the end node, via a first network node, a fault signal indicating a network node fault of a second network node that is different than the first network node; determining, at the end node, using said generated list, whether or not the second network node is a network node that is used in routing signals to or from said end node; and initiating a fault response operation when it is determined that the second network node is used in routing of signals to or from said end node.