From: Rob Hopkins (rshopkins@xxxxxxxxxxxxx)
Date: Wed Apr 18 2001 - 14:41:58 GMT-3
come on guys, dont give up so easy...
change the subnet mask on r1 to /22, I know we were always taught subnet
masks should
match, but as long as you keep track of what each router "thinks" its
connected to, it will be alright..
If R1 needed to have any routes from 172.16.37.0 thru 172.16.39.0 you're
gonna have bigger problems,
(unless they are hanging out on your serial port..) but since it wasnt in
this case..
output follows:
172.16.0.0/24 is subnetted, 3 subnets
C 172.16.36.0 is directly connected, Serial0
I 172.16.24.0 [100/8976] via 172.16.35.1, 00:01:56, Serial0
[100/8976] via 172.16.36.1, 00:00:07, Serial0
C 172.16.6.0 is directly connected, Loopback100
r2#
----- Original Message -----
From: "Alejandro Cadarso" <a.cadarso@uniway-tec.com>
To: "Darren Ward" <dward@pla.net.au>; "Walter Chen" <wchen@iloka.com>;
"ccielab" <ccielab@groupstudy.com>; <lkounkar@uu.net>
Sent: Wednesday, April 18, 2001 12:37 PM
Subject: Re: Redistributing OSPF /22 to IGRP /24, same mayor network
> Good idea Darren,
>
> Perhaps your way could work, the problem is that when I try to put any
> IP address from the /24's in a loopback I have:
>
> >r4(config-if)#ip address 172.16.26.1 255.255.255.0
> >172.16.26.0 overlaps with Ethernet0
>
> This sounds logical because in this case we would have two interfaces in
> the same /24 network
>
> Louie Answer could be better the problem is that I have another OSPF
> Router in the same mayor network and I'm not allowed to change it.
>
> Thanks very much for your help, but I think there is no answer.
>
> Alejandro.
>
>
> Darren Ward wrote:
>
> > Hows this sound for a silly idea:
> >
> > The requirement is to get a /20 into a /24 IGRP domain.
> > The second requirement is that no static's can be used at all.
> >
> > Create a second OSPF process on the redistributing router (ospf 2 for
arguments
> > sake)
> > Create one or more loopbacks and put the 4 /24's on it.
> > Redistribute the ospf 2 into IGRP and IGRP into ospf 1.
> >
> > You may need to do some tweaking on the border router, maybe policy
routing at
> > worst.
> >
> > Darren
> >
> >
> > Walter Chen wrote:
> >
> >> The "area x range" command won't work in this case because it won't
change
> >> the way directly connected networks are redistributed to IGRP. Using
static
> >> routes in this case is preferred because you only need four of them.
> >>
> >> However, if you were asked to redistribute /20 OSPF into /28 IGRP (in
this
> >> case you have to configure 256 static routes!) or you were not allowed
to
> >> use static routes, then you could configure a separate major network
with a
> >> /24 mask in OSPF domain, say, 192.168.1.0/24 and redistribute it into
IGRP.
> >> >From the IGRP router, configure this network to be your
default-network to
> >> let you reach the OSPF 172.16.x.x/20 networks.
> >>
> >> If you are now allowed to use either static or IGRP default-network,
then
> >> you're stuck.
> >>
> >> Walter
> >>
> >> -----Original Message-----
> >> From: Michel GASPARD [mailto:mgaspard@cisco.com]
> >> Sent: Wednesday, April 18, 2001 8:12 AM
> >> To: Alejandro Cadarso
> >> Cc: ccielab
> >> Subject: Re: Redistributing OSPF /22 to IGRP /24, same mayor network
> >>
> >> Alejandro,
> >>
> >> Did you already tried the "area x range" command?
> >>
> >> Regards,
> >>
> >> Michel
> >>
> >> Alejandro Cadarso wrote:
> >>
> >>> I'm playing with the following scenario and was unable to imagine how
> >>> can I get 172.16.24.0/22 redistributed from ospf to igrp for r2
> >>> inserting it in its routing table.
> >>>
> >>> Any suggestions will be appreciated. Of course neither Default routing
> >>> nor static are allowed.
> >>>
> >>> ospf igrp loop0
> >>> -------------r1------------------r2----172.16.6.0/24
> >>>
> >>> 172.16.24.0/22 172.16.36.0/24
> >>> **Please read:http://www.groupstudy.com/list/posting.html
> >>
> >> **Please read:http://www.groupstudy.com/list/posting.html
> >> **Please read:http://www.groupstudy.com/list/posting.html
> >
> > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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