RE: ATM Back-to-Back Config

From: Rohan Grover (rohang@cisco.com)
Date: Thu Jul 08 2004 - 05:58:36 GMT-3

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Hi,

Ok, so Ethernet uses 1,2,3,6
T1/E1 use 1,2,4,5

Any idea what pins ISDN BRI uses?

Thanks
Rohan

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of robbie
Sent: Thursday, July 08, 2004 7:44 AM
To: ccielab@groupstudy.com
Subject: Re: ATM Back-to-Back Config

Since this is something with which I deal every day (and consequently
something near and dear that I feel all CCIE's should at least have a
LITTLE knowledge of)...

T1s use pins 1, 2, 4, and 5 (well, they do here in the US anyhow - E1s
elsewhere use the same pinconfig IIRC).

1 -> 4 (-RX to -TX)
2 -> 5 (+RX to +TX)
4 -> 1 (-TX to -RX)
5 -> 2 (+TX to +RX)

+/- are also known as 'tip' and 'ring', respectively.

HTH,
Robbie

Alfred Chin wrote:

> Try using the console cable instead. It works for me.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Jose Mujica
> Sent: Wednesday, July 07, 2004 3:47 PM
> To: ccielab@groupstudy.com
> Subject: ATM Back-to-Back Config
>
> HI.
>
> I have two 2600 routers each with an NM-1ATM-25 atm card. I would
> like to do a back-to-back configuration but the interface still down,
> down. I look at CCO
> sample configs and I'm using exactly the same configuration without any
> luck.
>
> I'm using 12.2(15)T12 on both routers... Here the configuration I'm
> using:
>
> R1:
>
> interface ATM1/0
> ip address 192.168.1.20 255.255.255.0
> map-group atm-in
> atm clock INTERNAL
> atm pvc 1 1 5 aal5snap
> atm ilmi-keepalive
> no atm address-registration
> !
> map-list atm-in
> ip 192.168.1.10 atm-vc 1 broadcast
> !
>
>
> R2:
>
> interface ATM1/0
> ip address 192.168.1.10 255.255.255.0
> map-group atm-in
> atm clock INTERNAL
> atm pvc 1 1 5 aal5snap
> atm ilmi-keepalive
> !
> map-list atm-in
> ip 192.168.1.20 atm-vc 1 broadcast
> !
>
> I tried with standard ethernet cables (i.e. straight and cross
> cables)..
>
> Am I missing something else?
>
> Thanks in advanced,
> -Jose

• Next message: Moreau, Franck: "RIP route loop"
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• Maybe in reply to: Jose Mujica: "ATM Back-to-Back Config"
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