Cisco Technology, Inc.

Anthony Lee Hain

Ralph Droms

David Delano Ward

Madhu Sudan

Ciprian Pompiliu Popoviciu

Salman Asadullah

Adeel Ahmed

In one embodiment, a method comprises detecting, by a router, a 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. The router detects an unsolicited delegated IPv6 address prefix from the attachment router and that is available for use by the router. The router claims 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.

Extensions to IPv6 neighbor discovery protocol for automated prefix delegation

A management scheme compares a source address included in a received solicitation with an address for a registered endpoint. A communication including a management prefix is communicated to the endpoint when the source address matches the registered address.

Controlling advertisement of management prefixes

A method and system for automatically interconnecting IPv4 networks across an IPv6 network are disclosed. The method includes receiving an IPv4 packet at an ingress router in the IPv6 network and finding the longest match IPv4 routing entry for IPv4 addresses in the received packet to identify an egress router in the IPv6 network. The IPv4 packet is encapsulated to create an IPv6 packet, wherein destination and source addresses of the encapsulated packet identify a subnet router anycast corresponding to the ingress router and the egress router in the IPv6 network. The encapsulated packet is forwarded to the egress router.

Growing community of inventors

Woodinville, WA, United States of America

Anthony Lee Hain