Switching White Papers

IS-IS Multi-Topology

Overview Intermediate Systems to Intermediate Systems (IS-IS) is a routing protocol used today by many Internet Service Providers (ISPs). Originally developed for OSI [ISO10589], extensions have been made available to support IPv4 [RFC1195]. IS-IS has been further extended to support IPv6 [H01], and it now runs on ISP backbone deploying dual stack transition mechanism. Although it is preferable to reduce operational complexity with a single IGP, the initial deployment of IS-IS for IPv6 suffers from the constraint to see IPv4 and IPv6 adopting a common topology. The supported IPv6 network/interface must be congruent to the IPv4 network. This paper describes how Cisco IOS(R) Software Releases 12.2(15)T, 12.2(18)S, and 12.0(26)S support Multi-Topology IS-IS IPv6 on the Cisco 12000 Series Internet Router.

Further White Paper Details
PublisherCisco Systems File FormatPDF
Date PublishedDecember 2003
FormatWhite Papers   
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