Patent ID: 8045558
Filing Date: 2011-10-25
Classification: H04L

Abstract:
1. A method comprising: detecting, by a router, an unsolicited first router advertisement message from an attachment router that provides an attachment link used by the router, the first router advertisement message specifying a first IPv6 address prefix owned by the attachment router and usable for address autoconfiguration on the attachment link; detecting, by the router, an unsolicited delegated IPv6 address prefix from the attachment router and that is available for use by the router; and claiming by the router a second IPv6 address prefix from at least a portion of the delegated IPv6 address prefix, for use on at least one ingress link of the router, wherein the claiming includes outputting onto the attachment link a neighbor advertisement message having a prefix option field specifying one of ownership or attempted ownership of the second IPv6 address prefix.