Routing > OSPF > Virtual Links
Routing
324
RM GUI HiSecOS EAGLE20/30
Release
3.0
09/2015
Routing > OSPF > Virtual Links
8.15 OSPF Virtual Links
OSPF requires that you link every area to the backbone area. The physical
location of routers often prohibits a direct link to the backbone. Virtual links
allow you to connect physically separated areas to the backbone through a
transit area. You specify both routers on the endpoints of a virtual link as
ABRs on a point-to-point link.
To enter a virtual link in the table, click the "Create" button.
Table
Parameters Meaning
Area ID Displays the area ID for the transit area that the virtual link traverses.
Possible values:
transit area ID
Neighbor ID Displays the router ID of the virtual neighbor.
The router learns this value from hello packets received from the virtual
neighbor. The value is a static value for virtual adjacencies.
Possible values:
router ID (default setting:
0.0.0.0
)
Transmit Delay [s] Specifies the estimated number of seconds it takes to transmit an LS update
packet over this interface.
This setting is useful for low speed links. The timer increases the age of the
LS updates to compensate for estimated delays on the interface. Increasing
the packet age too much results in a reply that is younger than the original
packet.
Possible values:
0..3600
(default setting:
1
)
Retrans Interval
[s]
Specifies the number of seconds between the LS advertisement
retransmissions for adjacencies belonging to this interface.
You also use this value when retransmitting Database Description (DD) and
LS Request packets.
Possible values:
0..3600
(default setting:
5
)
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