[c-nsp] Deny Default Route Propagation

[Ivan Pepelnjak]

No, you cannot control the LSA flooding (apart from blocking the flooding
over a particular interface). All LSAs still get to all the routers (this is
what you've asked for: OSPF is a link-state protocol :), but you can control
which of the best OSPF routes get inserted in the IP routing table with the
"distribute-list in".

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

> -----Original Message-----
> From: Jeremiah Best [mailto:jbest at zyedge.com] 
> Sent: Thursday, August 06, 2009 6:13 PM
> To: Ivan Pepelnjak; skoal at skoal.name; 'Manaf Al Oqlah'
> Cc: cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] Deny Default Route Propagation
> 
> 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
> > > _______________________________________________
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> > > archive at http://puck.nether.net/pipermail/cisco-nsp/
> > 
> > 
> 
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