DELL S50V User Manual

|

Open Shortest Path First (OSPFv2 and OSPFv3)

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Use the following command in CONFIGURATION ROUTER OSPF mode to configure virtual links. 

Use the 

 command 

 in the EXEC mode to view the 

virtual link.

To filter routes, use prefix lists. OSPF applies prefix lists to incoming or outgoing routes. Incoming routes 
must meet the conditions of the prefix lists, and if they do not, OSPF does not add the route to the routing 
table. Configure the prefix list in CONFIGURATION PREFIX LIST mode prior to assigning it to the 
OSPF process.

 [

hello-interval 

seconds | retransmit-interval seconds | transmit-delay 
seconds | dead-interval seconds | authentication-key 
key | message-digest-key keyid md5 key]

CONFIG-ROUTER-
OSPF-id

Configure the optional parameters of a 
virtual link:

•

Area ID: assigned earlier (0-65535 or 
A.B.C.D)

•

Router ID: IP address associated with 
the virtual link neighbor

•

Hello Interval Seconds: 1-8192 
(default 10)

•

Retransmit Interval Seconds: 1-3600 
(default 5)

•

Transmit Delay Seconds: 1-3600 
(default 1)

•

Dead Interval Seconds: 1-8192 
(default 40)

•

Authentication Key: 8 characters

•

Message Digest Key: 1-255 

•

MD5 Key: 16 characters

Only the Area ID and Router ID require configuration to create a 
virtual link. If no other parameter is entered, the defaults are used.
Use EITHER the Authentication Key or the Message Digest 
(MD5) key. 

CONFIGURATION

Create a prefix list and assign it a unique 
name. You are in PREFIX LIST mode.

FTOS#show ip ospf 1 virtual-links

Virtual Link to router 192.168.253.5 is up

    Run as demand circuit

    Transit area 0.0.0.1, via interface GigabitEthernet 13/16, Cost of using 2

    Transmit Delay is 1 sec, State POINT_TO_POINT,

        Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

        Hello due in 00:00:02

FTOS#