450 CHAPTER 34: IPV6 OSPFV3 CONFIGURATION■ Since OSPFv3 is a link state based routing protocol, it cannot directly filter LSAsto be advertised. Therefore, you need to configure filtering redistributed routesbefore advertising routes that are not filtered in LSAs into the routing domain.■ Use of the filter-policy export command takes effect only on the local router.However, if the import-route command is not configured, executing thefilter-policy export command does not take effect.Tuning andOptimizing an OSPFv3NetworkThis section describes configurations of OSPFv3 timers, interface DR priority, MTUcheck ignorance for DD packets, disabling interfaces from sending OSPFv3packets.OSPFv3 timers:■ Packet timer: Specified to adjust topology convergence speed and networkload■ LSA delay timer: Specified especially for low speed links■ SPF timer: Specified to protect networks from being over consumed due tofrequent network changes.For a broadcast network, you can configure DR priorities for interfaces to affectDR/BDR election.By disabling an interface from sending OSPFv3 packets, you can make otherrouters on the network obtain no information from the interface.Prerequisites ■ Enable IPv6 packet forwarding■ Configure OSPFv3 basic functionsConfiguring OSPFv3TimersFollow these steps to configure OSPFv3 timers:To do… Use the command… RemarksEnter system view system-view -Enter interface view interface interface-typeinterface-number-Configure the hellointervalospfv3 timer hello seconds[ instance instance-id ]Optional10 seconds by defaultConfigure the deadintervalospfv3 timer dead seconds[ instance instance-id ]Optional40 seconds by defaultConfigure the LSAretransmission intervalospfv3 timer retransmit interval[ instance instance-id ]OptionalDefaults to 5 secondsConfigure the LSAtransmission delayospfv3 trans-delay seconds[ instance instance-id ]OptionalDefaults to 1 secondReturn to system view quit -Enter OSPFv3 view ospfv3 [ process-id ] -Configure the SPF timer spf timers delay-intervalhold-intervalOptionalBy default, delay-interval is 5seconds, and hold-interval is10 seconds
