I have an interesting problem with an attempt to add an ATM card (an
ATM-1AE3) into a 3640.

I'm using 12.2.13a Enterprise Plus IOS (ie most recent available).

Router 1 is my test 3600.

Slot 0 - 2E2W dual ethernet / dual WIC (nothing in the WIC slots)
Slot 1 - Serial 4T
Slot 2 - empty
Slot 3 - ATM 1A E3

Router 2 is the live network 3600.

Slot 0 - 2FE2W dual fast ethernet / dual WIC (nothing in the WIC slots)
Slot 1 - Serial 4T
Slot 2 - PRI 1CE1U
Slot 3 - ATM 1A E3

Both routers report bootstrap 11.1(19)AA. Both had 12.2.13a installed from
the same image file.

Installed in Slot 3, the test router sees the ATM card, but the live router
doesn't.

I wondered if there might be a problem with the slot rather than the card,
so I tried putting a spare 2E2W card in slot 3 - that's seen with no
problems.

The only differences between the two setups are that the live router has
dual fast ethernet rather than ethernet, and it has the PRI card installed.

To see if it's the PRI card that makes the difference, I took it out and
rebooted - that made no difference, so it looks like the problem must have
something to do with the fast ethernet card.

Has anybody seen a similar problem or have any suggestions what I should try
next? I don't have a spare 2FE2W to try in the test router, sadly (and I
can't take the live one down until next weekend).

Cisco tell me that the ATM and Fast Ethernet should definitely work togther
(makes sense... wouldn't be terribly clever to bring a 34Mb ATM circuit into
a router then provide a nice 10M half duplex bottleneck onwards!). I've
opened a TAC call but do far I don't have an answer from Cisco...

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