NOTE: The OSPFv2 network area command enables OSPF on multiple interfaces with the single command. Use the OSPFv3ipv6 ospf area command on each interface that runs OSPFv3.All IPv6 addresses on an interface are included in the OSPFv3 process that is created on the interface.Enable OSPFv3 for IPv6 by specifying an OSPF process ID and an area in INTERFACE mode. If you have not created an OSPFv3 process,it is created automatically. All IPv6 addresses configured on the interface are included in the specified OSPF process.NOTE: IPv6 and OSPFv3 do not support Multi-Process OSPF. You can only enable a single OSPFv3 process. To create multipleOSPF processes you need to have multiple VRFs on a switch.Set the time interval between when the switch receives a topology change and starts a shortest path first (SPF) calculation.timers spf delay holdtimeNOTE: To set the interval time between the reception of topology changes and calculation of SPF in milli seconds, use thetimers spf delay holdtime msec command.ExampleDell#confDell(conf)#ipv6 router ospf 1Dell(conf-ipv6-router_ospf)#timer spf 2 5 msecDell(conf-ipv6-router_ospf)#Dell(conf-ipv6-router_ospf)#show config!ipv6 router ospf 1timers spf 2 5 msecDell(conf-ipv6-router_ospf)#Dell(conf-ipv6-router_ospf)#endDell#Enabling IPv6 Unicast RoutingTo enable IPv6 unicast routing, use the following command.• Enable IPv6 unicast routing globally.CONFIGURATION modeipv6 unicast routingApplying cost for OSPFv3Change in bandwidth directly affects the cost of OSPF routes.• Explicitly specify the cost of sending a packet on an interface.INTERFACE modeipv6 ospf interface-cost• interface-cost:The range is from 1 to 65535. Default cost is based on the bandwidth.• Specify how the OSPF interface cost is calculated based on the reference bandwidth method. The cost of an interface is calculated asReference Bandwidth/Interface speed.ROUTER OSPFv3auto-cost [reference-bandwidth ref-bw]Open Shortest Path First (OSPFv2 and OSPFv3) 657
