450 CHAPTER 34: IPV6 OSPFV3 CONFIGURATION
■ Since OSPFv3 is a link state based routing protocol, it cannot directly filter LSAs
to be advertised. Therefore, you need to configure filtering redistributed routes
before 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 the
filter-policy export command does not take effect.
Tuning and
Optimizing an OSPFv3
Network
This section describes configurations of OSPFv3 timers, interface DR priority, MTU
check ignorance for DD packets, disabling interfaces from sending OSPFv3
packets.
OSPFv3 timers:
■ Packet timer: Specified to adjust topology convergence speed and network
load
■ LSA delay timer: Specified especially for low speed links
■ SPF timer: Specified to protect networks from being over consumed due to
frequent network changes.
For a broadcast network, you can configure DR priorities for interfaces to affect
DR/BDR election.
By disabling an interface from sending OSPFv3 packets, you can make other
routers on the network obtain no information from the interface.
Prerequisites
■ Enable IPv6 packet forwarding
■ Configure OSPFv3 basic functions
Configuring OSPFv3
Timers
Follow these steps to configure OSPFv3 timers:
To do… Use the command… Remarks
Enter system view system-view -
Enter interface view interface interface-type
interface-number
-
Configure the hello
interval
ospfv3 timer hello seconds
[ instance instance-id ]
Optional
10 seconds by default
Configure the dead
interval
ospfv3 timer dead seconds
[ instance instance-id ]
Optional
40 seconds by default
Configure the LSA
retransmission interval
ospfv3 timer retransmit interval
[ instance instance-id ]
Optional
Defaults to 5 seconds
Configure the LSA
transmission delay
ospfv3 trans-delay seconds
[ instance instance-id ]
Optional
Defaults to 1 second
Return to system view quit -
Enter OSPFv3 view ospfv3 [ process-id ] -
Configure the SPF timer spf timers delay-interval
hold-interval
Optional
By default, delay-interval is 5
seconds, and hold-interval is
10 seconds
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