[c-nsp] OSPF NSSA Question

Niels Bakker niels=cisco-nsp at bakker.net
Fri Sep 10 18:33:28 EDT 2004


>>My problem is that when I do that, the two distribution layer routers
>>form an adjacency with each other over the link%$#@#!!
>>
>>I realize that is "normal" behaviour... but it is not deseriable..

How would packets flow between these routers if they were to use
IP addresses from different subnets?


>>Can I:
>>
>>-Explicitly force the two dist routers somehow not to form the
>>adjacency?

* markom at pangalactic.net (Marko Milivojevic) [Sat 11 Sep 2004, 00:11 CEST]:
>    This is interesting question, indeed. The only thing that comes to my 
> mind is inbound ACL on one (or both) of the distribution routers blocking 
> OSPF traffic from another distribution router...
> 
>    Of course, there might be more elegant solution (this one strikes me as 
> ugly, frankly).

Sure.  Declare the interface as passive and explicitly list your
neighbors by IP address:

!
router ospf 1
 passive-interface FastEthernet0/0
 neighbor 1.2.3.4
 neighbor 1.2.3.6
!


	-- Niels.

-- 


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