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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