ospf stub area abr

Unanswered Question
May 10th, 2008


If I have a stub area and have 2 ABRs. lets say they are advertising a default route with a cost. Will the link cost connecting to the ABRs will be added to the advertised cost? How is the cost added to the advertised route? is it at ingress of a router or when the router is advertising the route?

I have this problem too.
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waleed_amer Sat, 05/10/2008 - 05:04

Hi friend,

The ABR will advertise a default route with a cost of 1 this is the default and you can sets the cost of the advertised default route by (area 1 default-cost) and any Router inside the stub area will add the ingress interface cost to received route cost.

Regards, W.Amer

NAVIN PARWAL Sat, 05/10/2008 - 05:23

are you sure , cause in my case the router advertised by ABR was not appended by the link cost in a stub network and was the name what I advertised it as....

Can you confirm your answer.


Harold Ritter Sat, 05/10/2008 - 07:01

W.Amer is right. You can do a "show ip ospf border" to see the cost to the ABR that will be added to the initial cost set by this same ABR.



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