
Chapter 14 • IPv6 Routing 251
14.3 OSPF and OSPFng
Defined in RFC 2328 (STD 54) “OSPF Version 2,” the current version of the
Open Shortest Path First (OSPF) protocol uses the link state method to let
routers create their own internetwork maps. Developed partly in response
to some of the shortcomings of RIP, OSPF propagates routing informa-
tion more quickly and stably than RIP, handles subnets appropriately, can
balance loads where equivalent routes are available, supports type of
service routing, and uses multicasting—all advantages over RIPv1.
Link state routing protocols, of which OSPF is an example, mandate that
each router in an AS maintain a link ...