Patent ID: 7483399
Filing Date: 2009-01-27
Classification: H04L

Abstract:
1. A method for establishing a data-link service, comprising the steps of: configuring a Resilient Packet Ring (RPR) in a data network, said ring comprising a plurality of ringlets for network traffic passing therethrough, said ring further comprising a plurality of nodes including a first node and a second node, said nodes having a plurality of interfaces for ingress and egress of said network traffic along said ringlets, said interfaces comprising message-transmitting interfaces and message-receiving interfaces; assigning respective interface identifiers to said interfaces, said interface identifiers comprising a RPR internet protocol (IP) address comprising a common IP address and a common subnet for each of said nodes; preparing a first Resource Reservation Protocol (RSVP) signaling message comprising an unnumbered explicit route object that includes said RPR IP address of said first node and a direction indicator of a specified traffic direction for said network traffic through a tunnel to be established via one of said ringlets between said first node and said second node; transmitting said first RSVP signaling message from said first node via one of said message-transmitting interfaces thereof to said second node; responsively to said first RSVP signaling message, returning a second RSVP signaling message from said second node to said first node, said second RSVP signaling message comprising said direction indicator of said explicit route object; responsively to receipt of said second RSVP signaling message in said first node, establishing said tunnel on said one of said ringlets; and routing said network traffic through said tunnel in said specified traffic direction.