Patent ID: 8477795
Filing Date: 2013-07-02
Classification: H04L

Abstract:
1. A network element for use in a broadcast network that depends on the establishment of Label Switched Paths (LSPs) by a label distribution protocol (LDP) that is tied to Internet Protocol (IP) forwarding decisions of an interior gateway protocol (IGP), wherein the network element is adapted to assist in avoiding black-holing of traffic and sub-optimal traffic diversion caused by IGP converging prior to LDP converging, the network element comprising: a broadcast network interface adapted to carry transit traffic through an LSP when LDP is operational; an LDP module to exchange label bindings with each neighbor of the network element; and an IGP module coupled to the LDP module, wherein the IGP module, responsive to bringing up an IGP adjacency with a Designated Router (DR) of the broadcast network, is operative to: