[c-nsp] Deny Default Route Propagation

Jeremiah Best jbest at zyedge.com
Thu Aug 6 12:12:57 EDT 2009


Can't you do a "distribute-list out" on the ABR/ASBR whichever the router is?

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ivan Pepelnjak
Sent: Thursday, August 06, 2009 12:01 PM
To: skoal at skoal.name; 'Manaf Al Oqlah'
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Deny Default Route Propagation

Just make sure you configure the "distribute-list in" on ALL OTHER routers
in the area, otherwise you'll get some hard-to-troubleshoot loops or
blackholes.

Ivan
 
http://www.ioshints.info/about
http://blog.ioshints.info/

> -----Original Message-----
> From: Gergely Antal [mailto:skoal at skoal.name] 
> Sent: Thursday, August 06, 2009 2:24 PM
> To: Manaf Al Oqlah
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Deny Default Route Propagation
> 
> http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/routmap.html
> 
> Manaf Al Oqlah wrote:
> > hello,
> > 
> > In OSPF, how can I filter the default route from being 
> propagated out in the same area? I want to deny the external 
> default route in outbound routes so other routers in the same 
> area doesn't accept the default route from that router.
> > 
> > Thank you,
> > Manaf
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net 
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> 
> 

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