I had this same problem with the community college I sponsor when they came back from summer break.

It turned out that their network administrator had not assigned an IP address for the AS400 from his fixed pool but from his DHCP pool. Over the summer the AS400 had been shutdown and some switch or router had gotten the 400's address via DHCP. They were then fighting over it and crashing each other's connections. I discovered this when I tried plain old TELNET and was getting a login that looked different from the 400's as well as wouldn't accept my user id.

Make sure that the address is not from the DHCP pool and that some other clever turkey hasn't hard coded the address in their system. You might try shutting the 400 down and then doing a ping to see if something else answers, then go shoot it.

Roger Vicker, CCP

On 1/16/2003 7:29 AM, Andy Nolen-Parkhouse wrote:


Could you add some detail?

You say that the system is dropping connections (could be a network
issue) but you also say that the console was dead. How is the console
attached? I'm assuming that it is a serial cable directly attached to
the AS/400.

Is there any common network connection which would affect all devices?
Including the console?

Are all devices TCP/IP attached or is there also twinax? If twinax, does
that continue to function?

It sounds as though you've looked in the obvious places. If a session is
attached when the system drops, is there a log entry that the session

How is disk capacity doing? Where is the ASP threshold set? What is the
processor light doing when the devices are dropped?

Just some thoughts,

Andy Nolen-Parkhouse

On Behalf Of Jim_Hawkins@eimoam.com

In addition to my regular duties, I teach a class part time at the
community college. They recently started experiencing a very unusual
problem. They are using a model 170 on V4R4. This box is used only
student use.
The problem is that the system drops connections to the outside world,
no log as to what has happened. Last night I got on the system at 5
it was OK. I tried again at 6 and could not connect. The console (PC)
could not even access the system. We IPL'd and the system came up. I
looked at the history log and there were only 3 entries, all normal
activity. I also checked the display on the box while we couldn't
and it read a normal '01 B N'. I also looked at SST and problem
and found nothing in those areas.
This started about 2 weeks ago and the system is being IPL'd at least 3
times a day to allow academic instruction to go on.
Nobody seems to know what type of a maintenance program they do/don't
so I hate to call IBM if we can solve this with out there assistance.

Thanks in advance for any insight you can provide.
Jim Hawkins

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