463
{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|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
>
<key>: A password consists of less than 8 characters
INTERVAL= [dead-interval|hello-interval|retransmit-interval|transmit-delay] <value>
<value>:
The delay or interval seconds, ranging between 1~65535
<dead-interval>:
A neighbor is considered offline for certain dead interval without its
group messages which the default is 40 seconds.
<hello-interval>:
The time interval before the router sends a hello group message,
default is 10 seconds
<retransmit-interval>:
The time interval before a router retransmitting a group
message, default is 5 seconds.
<transmit-delay>:
The time delay before a router sending a group messages,
default is 1 second
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.
Example:
Switch#config terminal
Switch(config) #router ospf 100
Switch(config-router) #area 1 virtual-link 10.10.11.50 hello 5 dead 20
14.6.3.9 auto-cost reference-bandwidth
Command: auto-cost reference-bandwidth <bandwith>
no auto-cost reference-bandwidth
