As a matter of good practice, one should always use the no auto-summary on
all (E) IGRP and RIP networks, unless you have a very good reason not to.
As an aside, one should always use the "subnets" switch when redistributing
into OSPF. Hhmmm.... Upon reflection maybe this one is a bit more open than
I originally thought....
More of the kinds of gotchas that can make your lab preparation more
challenging than you might want. ;->
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Tony
van Ree
Sent: Monday, April 16, 2001 3:58 PM
To: [EMAIL PROTECTED]
Subject: Re: subnets [7:638]
The most acurate address mask (prefix) would win. Even if you had
172.16.0.0/16 then put in an address of 172.16.20.0/24 the /24 would get a
choice over the /16.
That's what I understood and has been done a lot with EIGRP.
Teunis,
Hobart, Tasmania
Australia
On Sunday, April 15, 2001 at 11:31:38 AM, David Chandler wrote:
> No problem:
>
> #1. The addresses listed do not overlap (all different class Bs), and
EIGRP
> handles
> VLSM. **see #2**
>
> #2. EIGRP by default auto-summarizes at classful boundries, so either use:
>
> (config-router)#NO AUTO-SUMMARY {on all eigrp routers.}
>
> Or make just make sure you don't create multiple clouds of
172.20.xxx.xxx/24
> networks.
>
>
>
> DaveC
>
>
>
>
>
> SH Wesson wrote:
>
> > Our existing network consists of a flat network at 172.16.0.0 with a
mask
> of
> > 255.255.0.0 and 172.31.0.0 with a mask of 255.255.0.0. Since it is
flat,
> > the networks are 172.16.2.0 - 172.16.12.0 mask 255.255.0.0. EIGRP is
> > running. Now, the question I have is, if I create new subnets to
segment
> > the place with networks like 172.20.10.0, 172.20.11.0, 172.12.0, etc all
> > with masks of 255.255.255.0 and if I run EIGRP also. If I were to run
both
> > the above networks at once and within the same EIGRP process, would it
> cause
> > any problems. Thanks.
> >
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