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Default routing using area command for OSPF not working

I have a router (R6) that sits on the border of area 0 and area 6. I wish R6 to advertise a default route into area 6 using the area command.

This exercise is being done in GNS3 and is for study purposes.

When I type the command I get the following output:

R6(config-router)#area 0 range 0.0.0.0 0.0.0.0

OSPF: Cannot add this range as 0.0.0.0/0 represents default

According to my CCNP ROUTE book this should work.

Are there conditions that need to be met for this command to work? Any help would be much appreciated.

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1 ACCEPTED SOLUTION

Accepted Solutions

Default routing using area command for OSPF not working

Steven,

There are variuos ways to advertise default, when it comes to OSPF.

One ways is either you can make area 6 stub, total stub or NSSA as Reza suggested above.

Or else, you can do the below two commands:

1. summary-address ( since 0.0.0.0/0 is summary of all the IPs, you can use it)

2. default-information originate

One point to be remembered while doing above two commands, they will also put the default into all the areas running on that particular router.

Regards,

Smitesh

PS:  Please rate helpful posts...

3 REPLIES
VIP Super Bronze

Default routing using area command for OSPF not working

If you want r6 to send a a default router to area 6, than you need to configure area 6 as stub, totally stub or NSSA.

Area range is for summary configuration not for sendeng a default route to an area.

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a74.shtml

HTH

Default routing using area command for OSPF not working

Steven,

There are variuos ways to advertise default, when it comes to OSPF.

One ways is either you can make area 6 stub, total stub or NSSA as Reza suggested above.

Or else, you can do the below two commands:

1. summary-address ( since 0.0.0.0/0 is summary of all the IPs, you can use it)

2. default-information originate

One point to be remembered while doing above two commands, they will also put the default into all the areas running on that particular router.

Regards,

Smitesh

PS:  Please rate helpful posts...

Silver

Default routing using area command for OSPF not working

can anyone pls provide me cisco ios image for gns3?

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Posted by WebUser Ramesh Shetty from Cisco Support Community App

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