show ospf virtual-links

show ospf virtual-links

Displays information about OSPF virtual interfaces.

Syntax: show ospf virtual-links

Description: Virtual interfaces are used to maintain connectivity of the OSPF backbone area. All routers in the backbone area must interconnected and virtual links allow the backbone routers to form an adjacency through non-backbone areas.

Use the show ip ospf virtual-links command to display information about OSPF virtual links.

Factory Default: None.

Command Mode: Executive and privilege

Example: The following is sample output of the show ip ospf virtual-links command:

router#show ip ospf virtual-links

Interface address: 10.1.2.136 (POS 1/1/1) cost: 1, state: P To P, transit area: 1.2.3.4 hello: 10, dead: 40, retrans: 5 nbr id: 10.1.2.103, nbr address: 10.1.2.103 nbr state: Full, nbr mode: Master, last hello: 38

The following describes the fields in the display:

Table 2-10. Fields Displayed by show ospf virtual-links
Field Description

Interface address

The Internet address of the interface and the interface identifier as defined with the interface command.

cost

The cost associated with the virtual link.

state

The state of the interface. Possible states include: Down, Waiting, point-to-point (P To P)

transit area

The identifier of the area.

hello

The number of seconds to wait for a hello packet over this virtual link before declaring the adjacency down.

dead

The amount of time to wait for an advertisement on this link before declaring the adjacency down.

retrans

The retransmit interval. The amount of time to wait before resending an advertisement. This value is set with the ip ospf retransmit-interval command.

nbr id

The identifier of the neighbor.

nbr address

The address of the neighbor on the other end of this virtual link.

nbr state

The state of the neighbor. States include: Down, Init, 2 Way, Exch Start, Exchange, Loading, and Full.

nbr mode

The mode in which the neighbor operates. Modes can be: None, Slave, and Master.

last hello

The number of seconds since the last hello packet was received over this virtual link.

Related Commands: area virtual-link
show ip ospf
show ip ospf border-routers
show ip ospf database
show ip ospf neighbor

router#show ip ospf virtual-links Interface address: 10.1.2.136 (POS 1/1/1) cost: 1, state: P To P, transit area: 1.2.3.4 hello: 10, dead: 40, retrans: 5 nbr id: 10.1.2.103, nbr address: 10.1.2.103 nbr state: Full, nbr mode: Master, last hello: 38

**Table 2-10.** Fields Displayed by show ospf virtual-links
Field	Description
Interface address	The Internet address of the interface and the interface identifier as defined with the interface command.
cost	The cost associated with the virtual link.
state	The state of the interface. Possible states include: Down, Waiting, point-to-point (P To P)
transit area	The identifier of the area.
hello	The number of seconds to wait for a hello packet over this virtual link before declaring the adjacency down.
dead	The amount of time to wait for an advertisement on this link before declaring the adjacency down.
retrans	The retransmit interval. The amount of time to wait before resending an advertisement. This value is set with the ip ospf retransmit-interval command.
nbr id	The identifier of the neighbor.
nbr address	The address of the neighbor on the other end of this virtual link.
nbr state	The state of the neighbor. States include: Down, Init, 2 Way, Exch Start, Exchange, Loading, and Full.
nbr mode	The mode in which the neighbor operates. Modes can be: None, Slave, and Master.
last hello	The number of seconds since the last hello packet was received over this virtual link.

   Source File Name: ospf.fm
    HTML File Name: ospf30.html
    Last Updated: 05/10/04 at 16:34:58

show ospf virtual-links

Please email suggestions and comments to: doc@avici.com