OSPF Configuration
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Alcatel-Lucent
Beta Beta
OmniAccess 5740 Unified Services Gateway CLI Configuration Guide
TO CREATE VIRTUAL LINKS
In OSPF, all areas must be connected to a backbone area. If there is a break in
backbone continuity, or the backbone is purposefully partitioned, you can
establish a virtual link. The two endpoints of a virtual link are ABRs.
The virtual link must be configured on both routers. The configuration information
in each router consists of the other virtual endpoint (the other ABR) and the non
backbone area that the two routers have in common (called the transit area).
Virtual links cannot be configured through stub areas.
To display information about virtual links, use the ‘show ip ospf virtual-links’
command. To display the router ID of an OSPF router, use the ‘show ip ospf’
command.
E
XAMPLE
ALU(config-router ospf 1)# area 1 virtual-link 202.202.202.5
Command (in RCM) Description
area {<0-4294967295>|<ip-address>}
virtual-link <router-id>
[authentication [message-
digest|null] [[hello-interval|
retransmit-interval retransmit-
interval|transmit-delay|dead-
interval] <1-8192>] authentication-
key <0-0> <key>]| message-digest-
key <1-255> md5 <key>]]
Establishes a virtual link with
neighbor specified by router ID.
no area {<0-4294967295>|<ip-
address>} virtual-link <router-id>
[authentication [message-
digest|null] [[hello-interval|
retransmit-interval retransmit-
interval|transmit-delay|dead-
interval] <1-8192>] authentication-
key <0-0> <key>]| message-digest-
key <1-255> md5 <key>]]
Removes the virtual link with
neighbor specified by router ID.
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