Patent ID: 7177951
Filing Date: 2007-02-13
Classification: H04L,H04Q

Abstract:
1. A method of address management in a node serving as peer group leader for a peer group of nodes in one level of the hierarchy of a private network-to-network interface (PNNI) hierarchical network whereby the peer group leader represents said peer group to one or more neighboring nodes in the next level up of the hierarchy, the peer group leader having a memory for storing peer group topology data, comprising first address data which is supplied to the peer group leader from nodes in the peer group and represents addresses for access by the network, and peer group leader topology data, comprising second address data which is supplied to said neighboring nodes by the peer group leader and represents addresses accessible via the peer group, the method comprising: checking whether addresses represented by said first address data are accessible via the peer group and identifying addresses for which there are changes in accessibility; notifying said neighboring nodes of changes in the accessibility of addresses so identified; and updating said second address data comprising said peer group leader topology data in accordance with said changes.