Operation Manual – IPv6 RoutingH3C S7500E Series Ethernet Switches Chapter 3 IPv6 OSPFv3 Configuration3-10Note:z Using the import-route command on a router makes the router become an ASBR.z Since OSPFv3 is a link state based routing protocol, it cannot directly filter LSAs tobe advertised. Therefore, you need to configure filtering redistributed routes beforeadvertising routes that are not filtered in LSAs into the routing domain.z 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.3.6 Tuning and Optimizing an OSPFv3 NetworkThis section describes configurations of OSPFv3 timers, interface DR priority, MTUcheck ignorance for DD packets, disabling interfaces from sending OSPFv3 packets.OSPFv3 timers:z Packet timer: Specified to adjust topology convergence speed and network loadz LSA delay timer: Specified especially for low speed linksz 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 other routerson the network obtain no information from the interface.3.6.1 Prerequisitesz Enable IPv6 packet forwardingz Configure OSPFv3 basic functions3.6.2 Configuring OSPFv3 TimersFollow 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 default