8.4 OSPFv3 Caveats

CCNP RS 300-101, Configuring OSPFv3, Uncategorized

Using OSPFv3 has the advantage of centralizing both IPv4 and IPv6 in one area of the router’s configuration. It has some caveats.

  1. All routers must be running Cisco IOS 15.1(3)S or 15.2(1)T or later (depending on platform)
  2. Routers using IPv4 in OSPFv3 will not peer with OSPFv2 (traditional IPv4) routers (because the older routers do not set the address family bit)
  3. OSPFv3 routers use IPv6 link-local addresses for transport of both address-families

Configuration commands:

router ospf <process ID> = OSPFv2 (traditional IPv4 configuration)

ipv6 router ospf <process ID> = OSPFv3 (traditional IPv6 configuration)

router ospfv3 <process ID> = New style OSPFv3 to support IPv4 and IPv6 address-families

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