7 area virtual-link, Area virtual, Link – PLANET XGS3-24040 User Manual
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Switch (config)# router ospf 100
Switch (config-router)# area 1 stub
Related Command:
area default-cost
33.7 area virtual-link
Command:
area <id> virtual-link A.B.C.D {AUTHENTICATION |AUTH_KEY | INTERVAL}
no area <id> virtual-link A.B.C.D [AUTHENTICATION | AUTH_KEY | INTERVAL]
Function:
Configure a logical link between two backbone areas physically divided by non-backbone area. The
“no area <id> virtual-link A.B.C.D [AUTHENTICATION | AUTH_KEY | INTERVAL]” command
removes this virtual-link.
Parameter:
<id> is the area number which could be digits ranging between 0~4294967295, and also as an IP
address.
AUTHENTICATION = authentication [message-digest[message-digest-key <1-255> md5
|null|AUTH_KEY].
authentication : Enable authentication on this virtual link.
message-digest: Authentication with MD-5.
null : Overwrite password or packet summary with null authentication.
AUTH_KEY= authentication-key <key>.
INTERVAL= [dead-interval | hello-interval |
message-digest-key<1-255>md5
retransmit-interval | transmit-delay]
<value>:>: The delay or interval seconds, ranging between 1~65535.
messages which the default is 40 seconds.
seconds.
5 seconds.
Default:
None.
Command Mode:
OSPF protocol mode
Usage Guide:
In the OSPF all non-backbone areas will be connected to a backbone area. If the connection to the
backbone area is lost, virtual link will repair this connection. You can configure virtual link between
any two backbone area routers connected with the public non-backbone area. The protocol treat
routers connected by virtual links as a point-to-point network.