If you have routing enabled, Cisco IOS will not let
you put multiple interfaces in the same subnet. What
version of code are you using and are you sure this is
the way he has it configured? You're using RIP so have
routing enabled so something is fishy here. Equal-cost
multipath should work fine unless CEF or
fast-switching is giving you trouble. Try putting 'no
ip route-cache' under the serial interfaces.
If your using 12.1(3)T and above on both routers you
can bond both serial interfaces into a multilink group
and use 1 subnet.
Erick
--- Dimitrije <[EMAIL PROTECTED]> wrote:
> I colleague of mine has a network connecting two
> routers with redundant serial
> links. These serial links happen to reside in the
> same subnet as follows:
>
> Router
> A
> Router
> B
> S0 - 192.1.67.1/24 -----------------------------
> 192.1.67.201/24 - S0
> S1 - 192.1.67.2/24 -----------------------------
> 192.1.67.202/14 - S1
>
> Both Routers are running RIP.
>
> When both links are up, network is very sluggish and
> ping works intermittently
> (anywhere from 40%-70% of the time) between Routers
> A & B. When either link is
> shut down (only one link is up at a time), pings
> work 100% of the time.
>
> I'm suspecting that having both serial links in the
> same subnet is creating
> problems. First of all, can you even do this?
> Secondly, if you can put both
> serial 0 & 1 in the same subnet, is this creating a
> layer-2 bridge-loop
> environment?
>
> I think that putting each serial link in a separate
> sub-net should solve the
> problem, but I don't have access to any equipment to
> test this.
>
> Am I correct or off-base?? Any definitive feedback
> would be great. Any links
> to spell out the issues with this scenario would
> also be helpful.
>
> thanks,
> dj
>
>
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