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(ASCEND) Max 4000 - summary of probs

Hi,

I'm still in desperate need of help with our max4000 :(
Email to support@ascend.com seems to yield nothing more 
than a ticket number, so I'll once again try my luck here.

We really need to resolve the problems below. I'm the support
guy at our company (we're an ISP) and the customer complaints 
are costing me a lot of sleep!! Furthermore, in November we 
were planning to upgrade our remote locations with four 
additional max's. This upgrade is currently on hold due to the 
problems we are seeing.

Before I get to the bugs, here's our configuration:
Max 4000 (4030 E1 bundle), 2 x 16 K56 boards, eik.m40 5.0Ap27, 
two PRI lines (Net5, German DSS1), Ascend Radius, PPP only
accounts

Problems:

1. during at a fairly medium load (20 users) we get complaints 
   about substandard V.34 performance (avg. around 1.8K/s *local* 
   traffic). During several support calls by our users, I pinged 
   their IP's and it appears that their transfer stalls completely 
   for a few seconds every 10-20 seconds.

2. Some users connecting with ISDN X.75 complain about loss of 
   carrier during the first 30 seconds after the connection. Other
   users can stay online (with X.75) just fine and transfer data
   for a few minutes, but lose their protocol soon after (no more
   pings, no DNS, PPP and/or TCP/IP go dead). I also verified this 
   via ping. This is a very severe problem, because many of our 
   customers connect via external ISDN TA's that only do X.75. 
   The fact that the max 4000 supports X.75 was *the* main reason
   to get it. I can also rule out any kind of config problem on
   the customers side because there were no problems whatsoever
   with or old Livingston PM2E / external X.75 TA solution.

3. Users dialing in via the terminal server mode (we offer uucp
   via rlogin) are seeing severe stalls in transfer and/or loss
   of carrier. This mainly happens to the V.34 callers, although
   one customer with X.75 also appears to have this problem.
   Again, when the load on the max goes up (again with around 
   20 users) UUCP-callers are much more likely running into
   this problem.
   
Finally the good news. About 30% of our customers are connecting 
with ISDN HDLC/SyncPPP and they get great transfer rates and have 
no complaints whatsever...

Any help is welcome! I would also very much appreciate possible
hints and tips by the Ascend folks on this list how I could approach 
Ascend support concerning the above problems, be it by Email or 
phone.

Regards

Oliver
P.S: CC'ed to support@ascend.com, in the hope that someone actually
reads it...

-- 
Oliver J. Albrecht <olli@allcon.net>

AllCon GmbH         Lise Meitner Str. 2        D-24941 Flensburg
EMail: allcon@allcon.net     Tel: +49 461 9992-162     Fax: -165

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