area stub

Mode

Router OSPFv3 configuration: C3(su)‐>router(Config‐router)#

Usage

Address ranges control the advertisement of routes across area boundaries. Routing information is summarized, or aggregated, at area boundaries. External to the area, at most a single route is advertised (via an inter‐area‐prefix‐LSA) for each address range. A route is advertised if and only if the address range’s status is set to advertise. The default condition is to advertise.

For ABRs configured for NSSA, route summarization/aggregation can be implemented based on LSA type — either summary LSAs (specified with the summarylink parameter), or NSSA external LSAs Type 7 (specified with the nssaexternallink parameter).

You can configure multiple address ranges with this command.

Use the no form of this command to remove a configured address range.

Example

This example configures an address range to be consolidated and advertised based on summary LSAs.

C3(su)->router(Config-router)# area 20 range 3FFe:501::/32 summarylink

area stub

This command creates a stub area for the specified area ID.

Syntax

area areaid stub no area areaid stub

Parameters

areaid

Specifies the area ID in IP address format (dotted‐quad) or as a decimal

 

value.

 

 

Defaults

None.

Mode

Router OSPFv3 configuration: C3(su)‐>router(Config‐router)#

Usage

A stub area is characterized by the fact that AS external LSAs are not propagated into the area. Removing AS external LSAs and summary LSAs can significantly reduce the link state database of routers within the stub area.

Use the no form of the command to delete a stub area.

25-16 OSPFv3 Configuration

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Enterasys Networks 9034313-07 manual Area stub, This command creates a stub area for the specified area ID