Patent ID: 7720006
Filing Date: 2010-05-18
Classification: H04L

Abstract:
1. A system for determining reachability of a neighboring node from a node in a network, comprising: circuitry configured to receive a packet having a destination address for a node other than said node; circuitry configured to read a source address from said packet responsive to receiving said packet; circuitry configured to determine whether said source address is for a neighboring node for which said node needs to determine reachability; circuitry configured to make a reachability determination for said neighboring node according to whether said packet indicates a forward link from said node to said neighboring node, with said reachability determination based on one or more of a destination address for the packet, a source port for the packet, a destination port for the packet, an acknowledgement number, or sequence numbers from the packet, wherein the node sends fewer solicitation and response messages over the network as a result of the reachability determination; and circuitry configured to store reachability information for said neighboring node responsive to a determination of said forward link.