From: Vikas Gupta (vicky_gupta1803@xxxxxxxxx)
Date: Sun Dec 31 2000 - 22:54:22 GMT-3
Mohamed,
1. Try to see if you have a route with summary address
pointing to null0 in your routing table. If not, check
to see if you have subnets of summary route in the
routing table. If you don't have any subnets of this
summary route, you would never see the summary route
in routing table.
2. If you have summary route, try reloading the
routers, I had the same problem while doing something
like this a while ago.
Vikas
--- "Schmitt, Greg" <gschmitt@thrupoint.net> wrote:
> Mohamed,
>
> Area range summarizes into the area 0, and the OSPF
> summary command summarizes routes coming into the
> OSPF domain from other
> protocols (e.g. you igrp domain). Neither of these
> will summarize outgoing routes from a /28 area 0
> though.
>
> Is this your setup?
>
> R2------Frame Cloud
> -----R3-------------R4-----------R5
> OSPF Area 0 OSPF Area 3 IGRP
>
> With the redistribution taking place at R4, the /28
> bit network in area 0 can not be summarized. You
> will have to use the ip
> default-network command to reach those addresses.
>
> Cheers,
>
> Greg
> Greg Schmitt
>
> Internetwork Solutions Engineer
> ThruPoint, Inc. (formerly Total Network Solutions)
> Voice: 410-349-9772
> Cell: 443-822-5183
> Pager: 888-773-0423 or pager.gschmitt@thrupoint.net
> e-mail: GSchmitt@thrupoint.net
>
>
>
> -----Original Message-----
> From: Mohamed Heeba [mailto:MAHeeba@itqan.co.ae]
> Sent: Sunday, December 31, 2000 3:00 AM
> To: 'Schmitt, Greg'
> Cc: 'cisco@groupstudy.com'; 'ccielab@groupstudy.com'
> Subject: RE: OSPF summary problem!
>
>
> hi Greg;
> thx for your help , but i guess the problem is
> something else , the OSPF
> domain is supposed to send a route to the IGRP with
> 24 bit mask , which
> never happened
> the route exits in the OSPF as 28 bit mask subnet ,
> so it is natural that it
> will not be propagated to the IGRP domain unless I
> summarize at the 24 bit .
>
> i did already this summarization , i tried area
> range command to summarize
> from area 0 to the others , i tried aslo the
> summary-address at the ASBR
> router , still the route
> didnt propagate ...and the weired part is there is
> another subnet in the
> OSPF domain which is 26 bit ,i summarized it and it
> propagate naturally to
> the IGRP .
>
>
> anyone has any comment??
> thx
>
> > -----Original Message-----
> > From: Schmitt, Greg [SMTP:gschmitt@thrupoint.net]
> > Sent: Saturday, December 30, 2000 1:14 PM
> > To: 'Mohamed Heeba'
> > Subject: RE: OSPF summary problem!
> >
> > Hi Mohamed,
> >
> > On way around the variable length versus fixed
> length redistribution
> > problem with igrp is through the use of the 'ip
> > default-network' command.
> >
> > In your case, look at the routing table on r5, and
> find a classful route
> > that is being redistributed into igrp on r4. That
> > is, a route in the routing table that is defined
> at the default boundary
> > (e.g. 137.225.0.0). Once you've found that route
> > (you may have to create something on routers r1,
> r2, or r3) type the ip
> > default-route xxx.xxx.xxx.xxx command on r5
> > (replacing the xxx's with the actual route).
> >
> > This acts like a static route, but (may) gets you
> around the "can't use
> > any static routes" restriction.
> >
> > Hope this helps!
> >
> > Happy New Year!
> >
> > Greg
> >
> > Greg Schmitt
> >
> > Internetwork Solutions Engineer
> > ThruPoint, Inc. (formerly Total Network Solutions)
> > Voice: 410-349-9772
> > Cell: 443-822-5183
> > Pager: 888-773-0423 or
> pager.gschmitt@thrupoint.net
> > e-mail: GSchmitt@thrupoint.net
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com]On Behalf Of
> > Mohamed Heeba
> > Sent: Friday, December 29, 2000 1:30 PM
> > To: 'cisco@groupstudy.com'
> > Cc: 'ccielab@groupstudy.com'
> > Subject: OSPF summary problem!
> >
> >
> > i was trying the Fatkid 501 redistribution lab
> when i got this problem
> >
> > the lab is 5 routers , 3 of them (R1,R2,R3) are
> in area 0 over Frame
> > relay
> > with a subnet of 28 bit mask
> > one of this routers ( R3) are connected to another
> router ( R4) forming
> > area
> > 3 on the link between them , and another area on
> its loopback interface
> > (area 2 )
> >
> > now R4 is connected to another router (R5) and the
> link between them is
> > running IGRP with subnet of mask 24 .......i hope
> this is clear to you
> >
> > the problem is
> > i have formed a virtual link between R4 and R3 and
> things looked fine to
> > me
> > BUT when i redistribute the OSPF to the IGRP , the
> 28 bit subnet never
> > appeared to R5
> > i summarized the network , trying the AREA range
> command at R3 , then at
> > R4
> > i tried also the summary-address at R4....but the
> subnet never appeared
> > in
> > R5
> > although some other networks ( of 26 bit masks)
> appreared fine when i
> > summarized them at 24 bit boundry
> > can anyone knows where is the problem ??
> >
> >
> > NOTE:when i configured the frame relay interfaces
> as point-to-mulitpoint ,
> > only the 32 address appreared in the routing
> tables , when i changed the
> > network type to broadcast type , the 28 bit subnet
> appeared ..but still it
> > didnt go to the far IGRP router ...
> > wat is the problem ????
> >
> >
> >
> > Mohamed HEEBA
> >
> >
> >
> >
> >
> >
> >
>
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