9-5Enabling OSPFv3Prerequisitesz Make neighboring nodes accessible with each other at the network layer.z Enable IPv6 packet forwardingEnabling OSPFv3To enable an OSPFv3 process on a router, you need to enable the OSPFv3 process globally, assignthe OSPFv3 process a router ID, and enable the OSPFv3 process on related interfaces.A router ID uniquely identifies a router within an AS. Therefore, you need to specify a unique router IDfor each OSPFv3 router within the AS to ensure normal operation. Note that if a router runs multipleOSPFv3 processes, you need to specify a unique router ID for each process.An OSPFv3 process ID has only local significance. Therefore, process 1 on a router can exchangepackets with process 2 on another router.Follow these steps to enable OSPFv3:To do… Use the command… RemarksEnter system view system-view —Enable an OSPFv3 process andenter its view ospfv3 [ process-id ]RequiredBy default, no OSPFv3 process isenabled.Specify a router ID router-id router-id RequiredEnter interface view interface interface-typeinterface-number —Enable an OSPFv3 process on theinterfaceospfv3 process-id area area-id[ instance instance-id ]RequiredNot enabled by defaultConfiguring OSPFv3 Area ParametersThe stub area and virtual link features of OSPFv3 are the same as OSPFv2.Splitting an OSPFv3 AS into multiple areas reduces the number of LSAs and extends OSPFv3applications. For those non-backbone areas residing on the AS boundary, you can configure them asstub areas to further reduce the size of routing tables and the number of LSAs.Non-backbone areas exchange routing information via the backbone area. Therefore, the backboneand non-backbone areas, including the backbone itself must be contiguous. In practice, necessaryphysical links may not be available for such connectivity. You can configure virtual links to address theproblem.
