From: Horszczaruk Krzysztof (Krzysztof.Horszczaruk@xxxxxxxxxxxxx)
Date: Fri Jul 05 2002 - 04:32:28 GMT-3
that's normal behavior
if there is no ospf summary route int the routing table, it can not be
redistributed to igrp
you can redistribute just what appears in routing table, nothing more.
and when you do "no discard..." the summary to null0 disappears from the
routing table
and even with "no discard-route" the summary is still propagated to other ospf
routers.
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.com
<http://www.getronics.pl/> http://www.getronics.pl
-----Original Message-----
From: Gy?ri G?bor [mailto:Gabor.Gyori@lnx.hu]
Sent: Thursday, July 04, 2002 8:30 PM
To: steven.j.nelson@bt.com; Chaim.Gev@hp.com; Horszczaruk Krzysztof;
ccielab@groupstudy.com
Subject: RE: Summarizing from OSPF
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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