Administering OSPF Areas 85
Table 19 describes the fields in the areas display:
Defining an Area Each OSPF area is a logical group of network entities, including network
segments, routers, and nodes. Each area has the following parameters:
■ Area ID — This number, which is in the form of an IP address,
functions as an area identification number to the OSPF autonomous
system.
■ Stub Area — Indicates whether this area is a stub area. Stub areas
usually contain routers with limited memory resources and lie on the
edge of the network. Stub areas cannot contain virtual links.
When you define an area, the module assigns an index number to the
area. The module uses the next available index number for the area you
define.
To define an OSPF area:
1 Enter the following at the top-level menu:
ip ospf areas defineArea
The following prompt is displayed:
Enter Area ID []:
2 Enter the area identification number (ID).
Is this a stub area (yes,no) [no]:
3 Specify whether this area is a stub area. The default is no.
Modifying an Area To modify the attributes of an existing area range:
1 Enter the following at the top-level menu:
ip ospf areas modifyArea
Table 19 Field Attributes for the Areas Display
Field Description
Indx Entry index for the area
AreaID Area identifier
IP Address Network portion of IP address range
Mask Subnet mask
Advertise Should the range be advertised?
Stub Is the area a stub area?
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