-162
Default Setting
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
Command Usage
• 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. You can specify up to 32 virtual links on this router.
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.
• This router supports up 64 virtual links.
Example
This example creates a virtual link using the defaults for all optional
parameters.
This example creates a virtual link using MD5 authentication.
Related Commands
show ip ospf virtual-links (3-184)
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)#
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)#