Ivan is correct, I know this first hand after wrestling with this very recently.
You can only filter inbound from OSPF to the route table and you will need to do it on each OSPF router in the area. Cisco reference is here: http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a0080094704.shtml#q12 http://tinyurl.com/m4kvgg regards, Tony. --- On Fri, 7/8/09, Ivan Pepelnjak <[email protected]> wrote: > From: Ivan Pepelnjak <[email protected]> > Subject: Re: [c-nsp] Deny Default Route Propagation > To: "'Jeremiah Best'" <[email protected]>, [email protected], "'Manaf Al > Oqlah'" <[email protected]> > Cc: [email protected] > Date: Friday, 7 August, 2009, 3:40 AM > 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:[email protected]] > > > Sent: Thursday, August 06, 2009 6:13 PM > > To: Ivan Pepelnjak; [email protected]; > 'Manaf Al Oqlah' > > Cc: [email protected] > > 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: [email protected] > > > [mailto:[email protected]] > On Behalf Of Ivan Pepelnjak > > Sent: Thursday, August 06, 2009 12:01 PM > > To: [email protected]; > 'Manaf Al Oqlah' > > Cc: [email protected] > > 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:[email protected]] > > > Sent: Thursday, August 06, 2009 2:24 PM > > > To: Manaf Al Oqlah > > > Cc: [email protected] > > > 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 [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
