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LB9 User’s Guide 1361/1523
11.6.3.11 Configuring OSPF Virtual Link
Selection Criteria
Virtual Link Area ID - Select option 'Create New Virtual Link' from the dropdown menu to define a
new virtual link. The area portion of the virtual link identification is fixed: you will be prompted to enter
the Neighbor Router ID on a new screen.
Virtual Link Neighbor Router ID - Select the Virtual Link Neighbor Router ID for which you want to
display or configure data.
Virtual Interface Area ID - Select the Virtual Link Interface Area ID for which you want to display or
configure data.
Configurable Data
Neighbor Router ID - Enter the neighbor portion of a Virtual Link specification. Virtual links may be
configured between any pair of area border routers having interfaces to a common (non-backbone)
area. You only enter this ID when you are creating a new virtual link.
Hello Interval - Enter the OSPF hello interval for the specified interface in seconds. This parameter
must be the same for all routers attached to a network. Valid values range from 1 to 65,535. The
default is 10 seconds. .
Dead Interval - Enter the OSPF dead interval for the specified interface in seconds. This specifies
how long a router will wait to see a neighbor router's Hello packets before declaring that the router is
down. This parameter must be the same for all routers attached to a network. This value should a
multiple of the Hello Interval (e.g. 4). Valid values range from 1 to 2147483647. The default is 40.
Iftransit Delay Interval - Enter the OSPF Transit Delay for the specified interface. This specifies the
estimated number of seconds it takes to transmit a link state update packet over the selected
interface. Valid values range from 1 to 3600 seconds (1 hour). The default value is 1 second.
Retransmit Interval - Enter the OSPF retransmit interval for the specified interface. This is the
number of seconds between link-state advertisements for adjacencies belonging to this router
interface. This value is also used when retransmitting database descriptions and link-state request
packets. Valid values range from 1 to 3600 seconds (1 hour). The default is 5 seconds.
Authentication Type - You may select an authentication type other than none by clicking on the
'Configure Authentication' button. You will then see a new screen, where you can select the
authentication type from the pulldown menu. The choices are:
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