LevelOne GTL-2691 - Manual (Page 1492)

C HAPTER 49 | IP Routing Commands
Open Shortest Path First (OSPFv2)
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D EFAULT S ETTING
area-id: None
router-id: None
hello-interval: 10 seconds
retransmit-interval: 5 seconds
transmit-delay: 1 second
dead-interval: 40 seconds
authentication-key: None
message-digest-key: None
C OMMAND U SAGE
◆ All areas must be connected to a backbone area (0.0.0.0) to maintain
routing connectivity throughout the autonomous system. If it not
possible to physically connect an area to the backbone, you can use a
virtual link. A virtual link can provide a logical path to the backbone for
an isolated area, or can be configured as a backup connection that can
take over if the normal connection to the backbone fails.
◆ A virtual link can be configured between any two backbone routers that
have an interface to a common non-backbone area. The two routers
joined by a virtual link are treated as if they were connected by an
unnumbered point-to-point network.
◆ Any area disconnected from the backbone must include the transit area
ID and the router ID for a virtual link neighbor that is adjacent to the
backbone.
E XAMPLE
This example creates a virtual link using the defaults for all optional
parameters.
Console(config-router)#network 10.4.0.0 0.255.255.0.0 area 10.4.0.0
Console(config-router)#area 10.4.0.0 virtual-link 10.4.3.254
Console(config-router)#
This example creates a virtual link using MD5 authentication.
Console(config-router)#network 10.4.0.0 0.255.255.0.0 area 10.4.0.0
Console(config-router)#area 10.4.0.0 virtual-link 10.4.3.254 message-digest-
key 5 md5 ld83jdpq
Console(config-router)#
R ELATED C OMMANDS
show ip protocols ospf (1515)