AREA statement

Use the AREA statement to set the parameters for an OSPF area. If no areas are defined, OMPROUTE assumes that all directly attached networks belong to the backbone area (area ID 0.0.0.0).

Syntax


         .-Area_Number=0.0.0.0---------------.   
>>-Area--+-----------------------------------+------------------>
         '-Area_Number--=--ospf_area_address-'   

   .-Authentication_Type=None----------------.   
>--+-----------------------------------------+------------------>
   '-Authentication_Type--=--security_scheme-'   

   .-Stub_Area=NO--------.  .-Stub_Default_Cost=1--------.   
>--+---------------------+--+----------------------------+------>
   '-Stub_Area--=--value-'  '-Stub_Default_Cost--=--cost-'   

   .-Import_Summaries=YES-------.   
>--+----------------------------+------------------------------><
   '-Import_Summaries--=--value-'

Parameters

Area_Number

The OSPF area number in dotted decimal.

Authentication_Type

The default security scheme to be used in the area. Valid values for authentication types are MD5, which indicates MD5 cryptographic authentication as described in Appendix D of RFC 2328; PASSWORD, which indicates a simple password; or NONE, which indicates that no authentication is necessary to pass packets. The area's default security scheme can be overridden on an interface basis by specifying the Authentication_Type keyword on OSPF_INTERFACE or VIRTUAL_LINK statements.

Stub_Area

Specifies whether this area is a stub area or not. Valid values are YES or NO.

If you specify Stub_area = YES, the area does not receive any AS external link advertisements, reducing the size of your database and decreasing memory usage for routers in the stub area. You cannot configure virtual links through a stub area. You cannot configure a router within the stub area as an AS boundary router.

You cannot configure the backbone as a stub area. External routing in stub areas is based on a default route. Each border area router attaching to a stub area originates a default route for this purpose. The cost of this default route is also configurable with the AREA statement.

Stub_Default_Cost

The cost that an OMPROUTE area border router associates with the default route that it generates into the stub area. Valid values are in the range 1 - 16 777 215.

Import_Summaries

Determines whether this stub area mports a routing summary from a neighbor area. Valid values are YES or NO.