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DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
Virtual Interface Configuration
Virtual Interfaces are used by OSPF to link areas that do not have a physical connection to the
backbone (also called Area 0) or to link areas of the backbone itself that are discontinuous. This allows
routing information to flow from an area that is physically disconnected from area 0 into area 0 by
configuring an interface across one of the areas previously defined above.
To configure an OSPF Virtual Interface, highlight Virtual Interface Configuration and press Enter.
Figure 6-47. Virtual Interface Configuration screen
Note that the Hello Interval (Hello-Intv.), Dead Interval (Dead-Intv.), and Authorization Type (Auth.
Type) must be the same for the Transit Area and the remote area’s Neighbor Router.
The following fields can be set:
Parameter Description
Action:<Add/Modify
>
This field can be toggled using the
space bar between Add/Modify and
Delete. Add/Modify allows for the
creation of a new OSPF Virtual
Interface or changes to an existing
OSPF Virtual Interface. Delete allows
for the deletion of an existing OSPF
Virtual Interface.
Transit Area
ID:[ ]
Allows the entry of an OSPF Area ID
− previously defined on the switch −
that allows a remote area to
communicate with the backbone
(area 0). A Transit Area cannot be a
Stub Area or a Backbone.
Neighbor Router ID:[
]
The OSPF router ID for the remote
router. This is a 32-bit number in
the form of an IP address
(xxx.xxx.xxx.xxx) that uniquely
identifies the remote area’s Area
Border Router.
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