# Virtual Interface Configuration

Device > Configure > Open Shortest Path First (OSPF) > Open Shortest Path First (OSPF) > Virtual Interface Configuration

This dialog box provides the virtual interface configuration information for OSPF on this device.

To view the definition for a particular MIB variable, click the appropriate link from the following list:

- Transit Area ID (ospfVirtIfAreaID)

- Virtual Neighbor's Router ID (ospfVirtIfNeighbor)

- Transit Delay for link-state Update (ospfVirtIfTransitDelay)

- LSA Retransmission Interval (ospfVirtIfRetransInterval)

- Hello Packet Transmission Interval (ospfVirtIfHelloInterval)

- Dead Interval for Hello packets (ospfVirtIfRtrDeadInterval)

- Interface State (ospfVirtIfState)

- Authentication Key (ospfVirtIfAuthKey)

- Virtual Interface Entry Valid (ospfVirtIfStatus)

The following list specifies buttons in this dialog box, as well as their function:

- Click OK to continue.

- With an entry selected, click Monitor to launch the Virtual Interface State Monitoring dialog box.

- Click Cancel to close the dialog box.

- Click Refresh to update the contents of the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

Transit Area ID (ospfVirtIfAreaID)

Transit area that the virtual link traverses. By definition, the value of this object cannot be " 0.0.0.0".

Virtual Neighbor's Router ID (ospfVirtIfNeighbor)

Router ID of the virtual neighbor device.

Transit Delay for link-state Update (ospfVirtIfTransitDelay)

Estimated number of seconds needed to transmit a link-state update packet over this interface.

LSA Retransmission Interval (ospfVirtIfRetransInterval)

Number of seconds between link-state advertisement retransmissions, for adjacencies belonging to this interface. This value is also used when retransmitting database description and link-state request packets.

Hello Packet Transmission Interval (ospfVirtIfHelloInterval)

Length of time, in seconds, between Hello packet transmissions. This value must be the same for the virtual neighbor device.

Dead Interval for Hello packets (ospfVirtIfRtrDeadInterval)

Number of seconds that a router's Hello packets are not recognized before neighbor devices declare the router down. The value of this object should be a multiple of the Hello interval, and must be the same for the virtual neighbor device.

Interface State (ospfVirtIfState)

Indicates the OSPF virtual interface state.

Authentication Key (ospfVirtIfAuthKey)

Authentication key for this OSPF virtual interface. If the area's authorization type is set to "simplePassword" and the key length is shorter than 8 octets, the agent appends the number of zeros necessary to create an 8 octet string to the end of the key.

When read, this object always returns a zero-length string.

Virtual Interface Entry Valid (ospfVirtIfStatus)

This variable displays the validity or invalidity of the entry. Setting it to 'invalid' has the effect of rendering it inoperative. The internal effect (row removal) is implementation dependent.