From: Edison Ortiz (edisonmortiz@gmail.com)
Date: Sun Jul 06 2008 - 17:17:47 ART
The answer I posted states the use of MLPPP, therefore you are bundling the
interfaces together as one. Without MLPPP, routing wouldn't work.
This is one of the reasons the IOS allows you to assign IP address belonging
on the same subnet on multiple Serial interfaces w/o giving you an error but
for routing to work, you must finish your configuration for MLPPP.
HTH,
Edison Ortiz
Routing and Switching, CCIE # 17943
-----Original Message-----
From: Dale Shaw [mailto:dale.shaw@gmail.com]
Sent: Sunday, July 06, 2008 4:03 PM
To: Edison Ortiz
Cc: Fahad Khan; Cisco certification
Subject: Re: IP address on serial interfaces of a router
Hi Edison,
The question just before that one (same URL) is:
Q. Can I configure two interfaces in the same subnet (t0 =
142.10.46.250/24 and t1 142.10.46.251/24)?
A. No. For the routing to work, each interface should be on a
different subnet. However, if you are only bridging, and not doing IP
routing, then you can configure the two interfaces on the same subnet.
This more closely matches the OP's question. Fahad doesn't have
_duplicate_ IP addresses.
It's a bit of an odd scenario. I suspect it's got something to do with
the interfaces being treated as point-to-point, and the mask being
irrelevant, but I'm not sure and in a few minutes of searching I
haven't been able to find a definitive reference.
Maybe it's just a bug?
cheers,
Dale
On Sun, Jul 6, 2008 at 12:57 PM, Edison Ortiz <edisonmortiz@gmail.com>
wrote:
> Q. Is it possible to have duplicate ip addresses for two serial interfaces
> that belong to the same router?
>
>
> A. Yes, duplicate ip addresses are allowed on serial interfaces. It is a
> more efficient way of bundling links together (ie. MLPPP) and also a
better
> way to preserve address space. Change the encapsulation from the default
> HDLC to PPP in order to assign duplicate ip addresses.
>
>
>
>
http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a008012d
> 8f7.shtml#qa15a
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