The Routing Information Protocol (RIP) is a distance-vector routing protocol. It calculates its routing metrics based solely on hop-count.

A new version of RIP, often referred to as RIPng, was written to support IPv6. This new version of RIP shares the IPv4 limitations and mechanisms.

IPv6 RIP supports default routes, route redistribution, and route filtering.

You enable RIP with the Ipv6 router rip < word> command. The < word> specifies the RIP routing process to be used.

Include networks in the IPv6 RIP routing process at the interface level with the ipv6 rip < word> enable command. Once again, the < word> specifies the RIP process ID.

Configure default routes at the interface layer with the ipv6 rip < word> default-information originate command.

Integrated System-to-Integrated System (IS-IS) is a link-state routing protocol that was originally designed for CLNS routing. Extensions were written in to support IP and now IPv6.

Because it is a link-state routing protocol, its metric calculation is based on numerous factors, not just hop-count. It can therefore make better routing decisions than typical distance-vector routing protocols can.

IS-IS supports all the same functions as the IPv6 version of RIP and also supports specification of more than one path to use for data transmission through use of the maximum-paths command.

You enable IS-IS on a router with the CLNS routing