Kumar V Kalluri

US Patent:

20070104198, May 10, 2007

Filed:

Nov 10, 2005

Appl. No.:

11/271006

Inventors:

Kumar Kalluri - Southlake TX, US
Syed Hussain - Chicago IL, US
Niranjan Segal - Arlington TX, US

International Classification:

H04L 12/56

US Classification:

370392000, 370401000

Abstract:

A high availability network mechanism () is provided having a primary node () and at least one secondary node () utilizing Virtual Router Redundancy Protocol (“VRRP”) compatible redundancy systems. The primary and secondary nodes (and ) are associated with access routers (and , respectively) that are associated with edge routers (and , respectively). A virtual IP address is associated with the primary node () with a first cost assigned to the primary node (). The same virtual IP address is associated with the secondary node () with a second cost assigned to the secondary node (). A core IP network () utilizing an Open Shortest Path First (“OSPF”) compatible redundancy system is accessible through the edge routers (and ) such that the primary and secondary nodes (and ) advertise the virtual IP address with different costs on the IP network ().