Patent Document ID: 8654681
Application ID: 13545818
Patent Flag: 1

Claim One:
1. A method for Label Distribution Protocol (LDP) Multi-Topology (MT) discovery, the method comprising: generating, by a first packet-switched network node, an MT capability type-length-value (TLV) comprising capability specific data, wherein the MT capability TLV comprises an unknown (U) bit, a forwarding (F) bit, a type field indicating an MT capability type, a length field, and a capability data field comprising the capability specific data, wherein the capability specific data comprises information about MT capability support, the U bit indicates how to respond to an unknown received TLV, the F bit indicates whether to forward the unknown received TLV, and the length field indicates a length of the MT capability TLV; and transmitting, by the first packet-switched network node, the MT capability TLV to a second packet-switched network node.