Use this command to define an OSPF virtual link, which represents a logical connection between the backbone and a non-backbone OSPF area.
| area-id | Specifies the transit area for the virtual link. Valid values are decimal values or IP addresses. A transit area is an area through which a virtual link is established. |
| ip-address | Specifies the router id of the virtual link neighbor. A virtual link is established through the transit area to the virtual link neighbor. |
| authentication- key key | (Optional) Specifies a password to be used by neighbor routers. Valid values are alphanumeric strings of up to 8 bytes. Neighbor routers on a network must have the same password. |
| dead-interval seconds | (Optional) Specifies the number of seconds that the hello packets of a router are not communicated to neighbor routers before the neighbor routers determine that the router sending the hello packet is out of service. This value must be the same for all nodes attached to a certain subnet, and it is a value ranging from 1 to 2147843647. The default value is 60 seconds. |
| hello-interval seconds | (Optional) Specifies the number of seconds between hello packets on an interface. This value must be the same for all nodes attached to a network and it is a value ranging from 1 to 65535. The default value is 10 seconds. |
| message-digest-key digest-key md5 auth-key | (Optional) Specifies the message digest key settings:
|
| retransmit- interval seconds | (Optional) Specifies the number of seconds between successive retransmissions of the same LSAs. Valid values are greater than the expected amount of time required for the update packet to reach and return from the interface, and range from 1 to 3600. The default value is 5 seconds. |
| transmit-delay seconds | (Optional) Specifies the estimated number of seconds for a link state update packet on the interface to be transmitted. Valid values range from 1 to 3600. The default value is 1 second. |
None.
OSPF router configuration.
The “no” form of this command removes the virtual link if only the area ID and IP-address are specified. If an optional parameter is specified, that option is reset to its default value.
This example shows how to configure a virtual link between a router in OSPF area 0.0.0.2 and the ABR 134.141.7.2:
System(rw-config)->router ospf 1 System(rw-config-ospf-1)->area 0.0.0.2 virtual-link 134.141.7.2
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