IPv6 Routing Protocols
IPv6 routers need to learn routes for all the possible IPv6 prefixes (subnets). Just like with
IPv4, IPv6 routers use routing protocols, with familiar names, and generally speaking, with
familiar functions.
None of the IPv4 routing protocols could be used to advertise IPv6 routes originally. They
all required some kind of update to add messages, protocols, and rules to support IPv6.
Over time, Routing Information Protocol (RIP), Open Shortest Path First (OSPF), Enhanced
Interior Gateway Routing Protocol (EIGRP), and Border Gateway Protocol (BGP) were all
updated to support IPv6. Table 22-2 lists the names of these routing protocols, with a few
comments.
Table 22-2 IPv6 Routing Protocols
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