Re: (ASCEND) TNT intermittently stops sending RADIUS packets

[Peter Lalor <plalor@infoasis.com>]

>From: Jost Krieger <Jost.Krieger@ruhr-uni-bochum.de>
>
>Our Max TNT (running 7.0.26 since today, and 7.0.22 before) services
>quite a few E1 (ISDN PRI) lines with incoming modem (analog) and ISDN
>calls, all with PPP and RADIUS validation.
>
>After running a few hours, it starts reporting
>
>ASCEND: Radius client timeout (code=1) for user xxxxxxx
>
>for all incoming digital calls, without sending RADIUS packets for
>these calls.
>
>At the same time, analog calls are validated correctly using RADIUS.
>
>After reporting 180 such errors (with only slight variations), it goes
>back to normal for a few hours.

This is reminiscent of a TNT bug from way back in the 1.3Ap24 code 
days. Lemme see... TR 3048. This bug prevented the TNT from 
RADIUS-authenticating ISDN calls when the RADIUS servers are on a 
Frame Relay link handled by the same HDLC card and the ISDN call is 
assigned to.

This was pretty obscure, but it bit us at the time. It's long since 
been fixed, but if you have a similar config, try moving things 
around. Put a RADIUS server on Ethernet, or on a PPP link, or change 
how HDLC resources are allocated, etc.

HTH.


Peter Lalor           Infoasis
plalor@infoasis.com   http://www.infoasis.com/
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