From: Jason Gardiner (gardiner@xxxxxxxxxx)
Date: Tue Jun 12 2001 - 23:56:23 GMT-3
That did the trick. The book didn't say anything about the links needing
to be in the same address range as the subnets that you were trying to
announce. Thanks.
Thanks,
Jason Gardiner
Engineering Services
Sprint E|Solutions
"The only thing to prevent what's past is to put a stop to it before it happens
."
- Sir Boyle Roche
On Tue, 12 Jun 2001, Charles Ryan wrote:
> Jason,
>
> In order to get your two loopbacks to be announced as /24's, they would need
> to be part of the same major class network as your wan connections or
> point-to-point links, not to mention, have the same network mask (if I'm not
> mistaken). Look at the diagram below:
>
> 10.0.1.0/24 --lo0
> -----R1----------------T1-----------------R2----
> ---lo0----x.x.x.x
> 10.0.2.0/24 --lo1 10.0.3.1/24 10.0.3.2/24
>
>
> R1 and R2 are connected via a T1, and their ip addresses are 10.0.3.1/24 and
> 10.0.3.2/24 respectively. Since the loopback interfaces are part of the same
> major network as the wan interface (ie. they are part of the 10.0.0.0
> network, and each are /24), then the subnets on the loopbacks should be
> announced as /24's. Now, on the other hand, if the wan connection is a
> different major network (ie. 11.0.0.0), then the router will announce the
> loopbacks at the major network boundary (10.0.0.0/8).
>
> Someone please correct me if I'm wrong, or feel free to add more
> clarification.
>
> -Chuck Ryan
>
> ----- Original Message -----
> From: "Jason Gardiner" <gardiner@sprint.net>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, June 12, 2001 10:16 PM
> Subject: RIP/IGRP Clarification
>
>
> > All,
> >
> > Several books from which I study explain RIP and IGRP FLSMs in a manner
> > similar to this quote:
> >
> > "When subnetting is performed in a RIP or IGRP environment, all subnet
> > masks for a given classful address must be the same. They are "fixed
> > length subnet mask" (FLSM) environments. Also, for RIP and IGRP, all
> > subnets of a given classful network must be the same."
> >
> > To me, this sounds like you can break up a network like 10.0.0.0 into /24s
> > and have them announced across a RIP or IGRP network. Each subnet has the
> > same mask.
> >
> > I've tried it and run a debug. The only block announced is a /8, but the
> > routing table shows
> >
> > 10.0.0.0/24 is subnetted, 2 subnets
> > 10.0.0.0 is directly connected, Loopback 0
> > 10.0.1.0 is directly connected, Loopback 1
> >
> >
> > It appears that the protocol still announces based on the 3 bit classful
> > boundary and ignores the subnet information.
> >
> > Am I missing something, or is the information in the quote wrong?
> >
> >
> >
> > Thanks,
> >
> > Jason Gardiner
> > Engineering Services
> > Sprint E|Solutions
> >
> > "The only thing to prevent what's past is to put a stop to it before it
> happens."
> > - Sir Boyle Roche
> > **Please read:http://www.groupstudy.com/list/posting.html
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