It sound like you have AAA authentication/authorization enabled
for "ppp" or "network". This cause the PPP negotiation to require
some kind password exchange, which you probably don't have set up
for point-to-point links.
This most often hits on access servers like the AS5200's when you
have AAA set up for dial-up authentication and then try to bring
up one of the "just like a 2500" serial ports. 8-)
George
> From cisco-nsp-request@puck.nether.net Tue Oct 17 12:08:40 2000
> Resent-Date: Tue, 17 Oct 2000 12:05:42 -0400
> Received-Date: Tue, 17 Oct 2000 12:04:01 -0400
> Subject: PPP Problem
> To: cisco-nsp@puck.nether.net
> From: OZhang@tsibroadband.net
> Date: Tue, 17 Oct 2000 12:01:18 -0400
> X-MIMETrack: Serialize by Router on NY01SLD01/MAIL(Release 5.0.5 |September 22, 2000) at
> 10/17/2000 12:01:18 PM
> Resent-From: cisco-nsp@puck.nether.net
> X-Mailing-List: <cisco-nsp@puck.nether.net> archive/latest/4033
> X-Loop: cisco-nsp@puck.nether.net
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> Resent-Sender: cisco-nsp-request@puck.nether.net
>
> Hi,
>
> We enabled TACACS on a 7513 router, then all PPP links failed. Is
> there additional configuration required besides "encap ppp" for the serial
> links if TACACS is enabled ?
>
> -Ou
>
>
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