From: Joe Shmoe (herro91@xxxxxxxxx)
Date: Sun May 13 2001 - 23:53:42 GMT-3
Mohamed,
If a static route is not allowed, how about using
policy routing on the IGRP to match traffic to that
destination.
I know it would work, however, the route would not
show up in the routing table. Not sure if this is the
answer you are looking for.
-Joe
--- Mohamed Heeba <MAHeeba@itqan.co.ae> wrote:
> well ;
> i have given this option a thought to create
> secondary IP subnet of 22 on
> the IGRP domain ..i didnt try it ..but feel that it
> will work .....i have
> also thought that the lab is not prepared
> welll.....but still it offer a
> question ..is there anyway to summarize something
> like 22 mask of the ospf
> domain into higher mask like 24 in IGRP domain
> (simple static route can
> solve the damn problem...but wat if it is not
> allowed ?)
> thx
>
> > -----Original Message-----
> > From: Johnny Dedon [SMTP:johnny.dedon@exodus.net]
> > Sent: Friday, May 11, 2001 3:02 PM
> > To: Mohamed Heeba
> > Subject: Re: Fatkid lab 502 ,expert redistribution
> >
> > Mohamed,
> > I took a look at this lab and face value this is
> what I see.
> > You are not given a route to use to create a
> default to advertise into
> > igrp
> > so that option is out. You could possibly change
> the subnet mask on r4's
> > ethernet to a 22 bit mask and therefore it will
> advertise the 22 bit
> > subnet.
> > The extra routes created here would be lost. Not
> to change the lab, you
> > would need to leave the 24 bit mask on the other
> end. Downside to this I
> > think is you would need to summarize all of the
> ospf routes to 22 bit
> > mask.
> > I don't think this lab was very well written.
> >
> > Johnny Dedon
> > Senior Staff Consultant
> > Exodus Professional Services
> > johnny.dedon@exodus.net
> > www.exodus.net
> > ----- Original Message -----
> > From: "Mohamed Heeba" <MAHeeba@itqan.co.ae>
> > To: "'Johnny Dedon'" <johnny.dedon@exodus.net>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Friday, May 11, 2001 4:16 PM
> > Subject: RE: Fatkid lab 502 ,expert redistribution
> >
> >
> > > ok ;
> > > HOW to summarize 22 subnet in the OSPF domain to
> be advertise in 24 mask
> > > IGRP one ,
> > > the 22 is directly attached to the
> redistribution router ,only one area
> > is
> > > there ,area range command didnt work i mean
> > > thx
> > >
> > > > -----Original Message-----
> > > > From: Johnny Dedon
> [SMTP:johnny.dedon@exodus.net]
> > > > Sent: Friday, May 11, 2001 1:54 PM
> > > > To: Johnny Dedon; Mohamed Heeba
> > > > Cc: ccielab@groupstudy.com
> > > > Subject: Re: Fatkid lab 502 ,expert
> redistribution
> > > >
> > > > Correction on summary route.
> > > > I spoke too soon on the summary route.
> > > > The summary route can be created within OSFP
> for redistribution into
> > an
> > > > external routing protocol. If you want a
> summary to appear in ospf
> > then
> > > > it
> > > > must be created from routes external to the
> OSPF process or it must be
> > > > created using the area range command where it
> can only be seen by
> > routers
> > > > belonging to areas other than the area it is
> advertised from.
> > > >
> > > > HTH
> > > > Johnny Dedon
> > > > Senior Staff Consultant
> > > > Exodus Professional Services
> > > > johnny.dedon@exodus.net
> > > > www.exodus.net
> > > > ----- Original Message -----
> > > > From: "Johnny Dedon" <johnny.dedon@exodus.net>
> > > > To: "Mohamed Heeba" <MAHeeba@itqan.co.ae>
> > > > Cc: <ccielab@groupstudy.com>
> > > > Sent: Friday, May 11, 2001 3:37 PM
> > > > Subject: Re: Fatkid lab 502 ,expert
> redistribution
> > > >
> > > >
> > > > > Mohamed,
> > > > > Responses inline
> > > > > Johnny Dedon
> > > > > Senior Staff Consultant
> > > > > Exodus Professional Services
> > > > > johnny.dedon@exodus.net
> > > > > www.exodus.net
> > > > > ----- Original Message -----
> > > > > From: "Mohamed Heeba" <MAHeeba@itqan.co.ae>
> > > > > To: "'Johnny Dedon'"
> <johnny.dedon@exodus.net>; "Mohamed Heeba"
> > > > > <MAHeeba@itqan.co.ae>
> > > > > Cc: <ccielab@groupstudy.com>
> > > > > Sent: Friday, May 11, 2001 3:12 PM
> > > > > Subject: RE: Fatkid lab 502 ,expert
> redistribution
> > > > >
> > > > >
> > > > > > well;
> > > > > > i think things are more difficult than
> this ..let me share my
> > ideas
> > > > here
> > > > > > i agree that the OSPF summary command is
> used to summarize the
> > > > external
> > > > > > routes INTO the OSPF domain ,however in
> some solutions out there
> > ,it
> > > > is
> > > > > used
> > > > > > to summarize the OSPF itself to other
> protocols like IGRP ,but
> > this
> > > > will
> > > > > > work only if the subnets of the OSPF
> domain can be summarized at
> > the
> > > > IGRP
> > > > > > subnet boundary ,also the summary route
> will be propagated into
> > the
> > > > OSPF
> > > > > YOU HAVE TO HAVE A ROUTE TO CREATE THAT
> SUMMARY WITH AND IT MUST BE
> > > > EXTERNAL
> > > > > TO OSPF
> > > > > > domain as E2 route which i wasnt able to
> filter it at all(or it
> > will
> > > > aslo
> > > > > > disapear from the IGRP !!)
> > > > > > wat u explained about the route feedback
> is another problem called
> > > > black
> > > > > > holes ( i hope im right in this ) ]
> > > > > WHAT I TRIED TO EXPLAIN IS THE OSPF ROUTE
> WITH AN ADMINISTRATIVE
> > > > DISTANCE
> > > > OF
> > > > > 110 GETS DISTRIBUTED INTO IGRP WHERE IT GETS
> AND ADMINISTRATIVE
> > DISTANCE
> > > > OF
> > > > > 100. IF MUTUAL REDISTRIBUTION IS TAKING
> PLACE THEN THIS ROUTE WILL
> > BE
> > > > > REDISTRIBUTED BACK TO OSPF WHERE THE ROUTER
> WILL SEE THAT THIS ROUTE
> > > > COMING
> > > > > FROM IGRP HAS A LOWER ADMIN DISTANCE THAN
> THAT OF THE OSPF ROUTES
> > AND
> > > > > THEREFORE USE THIS ROUTE IN IT'S TABLE. IF
> YOU DO A SHOW IP ROUTE,
> > THEN
> > > > ALL
> > > > > OF THE OSPF ROUTES THAT WERE DISTRIBUTED
> INTO IGRP AND THEN BACK
> > WILL
> > BE
> > > > > LISTED AS E2. ANOTHER NOTE HERE IS THAT IN
> SOME CASES SPLIT HORIZON
> > > > WILL
> > > > > NOT ALLOW THE ROUTES BACK OUT OF IGRP SO
> THIS FEEDBACK DOES NOT
> > OCCUR.
> > > > > > where the routes of less admin distance
> will replace those of
> > higher
> > > > ones
> > > > > > and the routes will stuck in one domain
> ...this problem will only
> > > > happen
> > > > > if
> > > > > > u have TWO points of redistribution .
>
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