| US 7,526,571 B1 | ||
| IPv6 over MPLS IPv4 core | ||
| Daniel C. Tappan, Boxborough, Mass. (US); Eric C. Rosen, Arlington, Mass. (US); Ole Troan, Redhill (United Kingdom); Parag Jain, Nepean (Canada); Eric Levy-Abegnoli, Nice (France); Luc Revardel, La Gaude (France); and Francois Le Faucheur, Valbonne (France) | ||
| Assigned to Cisco Technology, Inc., San Jose, Calif. (US) | ||
| Filed on Jun. 11, 2007, as Appl. No. 11/811,515. | ||
| Application 11/811515 is a continuation of application No. 10/013818, filed on Dec. 07, 2001, granted, now 7,246,175. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 15/16 (2006.01) | ||
| U.S. Cl. 709—245 [709/238; 709/246; 370/292; 370/352; 370/230] | 17 Claims |
| 1. A method for operating a network node to forward a packet employing a first addressing scheme through a label switched
network employing a second addressing scheme, said method comprising:
receiving said first addressing scheme packet at a node having an address corresponding to said first addressing scheme and
an address corresponding to said second addressing scheme;
extracting destination address information according to said first addressing scheme from said first addressing scheme packet;
selecting a label stack for use in forwarding said packet through said label switched network employing said second addressing
scheme and a next hop into said label switched network based on said destination address information, said label stack including
a second level label assigned by an egress node of said label switched network; and
forwarding said first addressing scheme packet along with said label stack to said next hop without encapsulation within a
packet incorporating address information specified by said second addressing scheme;
wherein said first addressing scheme and said second addressing scheme comprise different versions of an IP addressing scheme.
|