From: Gy?ri G?bor (Gabor.Gyori@xxxxxx)
Date: Thu Jul 04 2002 - 15:30:23 GMT-3
I have tried the redistribution in ospf 1 --> ospf2 (summary) --> IGRP
direction on the same router.
The effect: summary routes pointing to Null0 appears in the routing table,
IGRP forwards the route, so it works same way as if I just put that static
route manually.
When I forbid the the creation of routes to Null0 by no discard-route
external, the routes to Null0 disappear, and unfortunately IGRP stops
advertising too.
I am using IOS 12.1.14.
Do you know a way when routes to Null0 does not appear in routing table, but
IGRP still advertises the summary ? ...
Or it should work and it is just a software bug or my mistake ?
Thanks, Gabor
> -----Original Message-----
> From: steven.j.nelson@bt.com [mailto:steven.j.nelson@bt.com]
> Sent: Thursday, July 04, 2002 5:28 PM
> To: Chaim.Gev@hp.com; Krzysztof.Horszczaruk@getronics.com;
> ccielab@groupstudy.com
> Subject: RE: Summarizing from OSPF
>
>
> Gev
>
> Even if you are not allowed statics, defaults or Null routes
> you can always
> kill the route to null 0 using the
>
> No discard route-internal
>
> Command....
>
> HTH
>
> Steve
>
> -----Original Message-----
> From: Gev, Chaim [mailto:Chaim.Gev@hp.com]
> Sent: 04 July 2002 16:05
> To: Horszczaruk Krzysztof; ccielab
> Subject: RE: Summarizing from OSPF
>
>
> Thanks, This works and looks like the right answer.
> I still wonder if manualy defining a route to null0 in order
> to summarize
> will violate the rule "do not use static routes"
>
> > -----Original Message-----
> > From: Horszczaruk Krzysztof
> > [mailto:Krzysztof.Horszczaruk@getronics.com]
> > Sent: Thursday, July 04, 2002 12:57 PM
> > To: Gev, Chaim
> > Subject: RE: Summarizing from OSPF
> >
> >
> > what, if you create another ospf process let say ospf b on
> > the router, then redistribute ospf a -> ospf b with
> summary-address ?
> >
> > this will create of course null0 route
> >
> > regards,
> > Krzysztof Horszczaruk
> > Senior Consultant, System Engineer
> > Network Integration
> >
> > Getronics Polska Sp. z o.o.
> > ul. Pulawska 352a
> > 02-819 Warszawa
> > http://www.getronics.com
> > http://www.getronics.pl
> >
> > >>>-----Original Message-----
> > >>>From: Gev, Chaim [mailto:Chaim.Gev@hp.com]
> > >>>Sent: Thursday, July 04, 2002 8:43 AM
> > >>>To: ccielab@groupstudy.com
> > >>>Subject: RE: Summarizing from OSPF
> > >>>
> > >>>
> > >>>> The scenario requirement is to run the routing protocol on
> > >>>all interfaces. So the loopbacks network is already in the
> > >>>OSPF database.
> > >>>>
> > >>>>
> > >>>>
> > >>>> >From: Hansang Bae <hbae@nyc.rr.com>
> > >>>> >Reply-To: Hansang Bae <hbae@nyc.rr.com>
> > >>>> >To: ccielab@groupstudy.com
> > >>>> >Subject: RE: Summarizing from OSPF
> > >>>> >Date: Tue, 02 Jul 2002 23:53:02 -0400
> > >>>> >
> > >>>> >At 08:31 AM 7/2/2002 +0200, Gev, Chaim wrote:
> > >>>> > >As stated in the IOS documentation: "For OSPF, this
> > >>>command summarizes only routes from other routing protocols
> > >>>that are being redistributed into OSPF". So, summary-address
> > >>>will not summarize our loopbacks if we run OSPF on these
> > interfaces.
> > >>>> > >The requirement is to use a /32 mask for the loopbacks.
> > >>>So setting network type on these interfaces will not make
> > any change.
> > >>>> >
> > >>>> >
> > >>>> >Why don't you redistribute your loopbacks with
> > >>>"redistribute connected subnets ...." command? You'll of
> > >>>course need a route-map to selectively add in the ones you want.
> > >>>> >
> > >>>> >hsb
> > >>>>
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