Default routing using area command for OSPF not working

[steven.crutchley]

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.

[Reza Sharifi]

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

[smitesh kharecha · Accepted solution]

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

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[fb_webuser]

can anyone pls provide me cisco ios image for gns3?

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