RE: Network dropping AS400

["Draper, Dale" <dale.draper@xxxxxxxxxxxx>]

        " "It doesn't work," the most
        frequently used complaint I have been faced with, has never yet---in
25
        years---led me to a solution.""

        I had to grin at that.

         Problem found, after, of course, the network guys pointing at the
400 as the source. Once they were proved different, were able to trace it to
2 machines (with 2 different IP's) using the same MAC address. This other
machine was stealing/using the 400's mac address (local adaptor address of
the ethline) causing the disruption.

        Thank you all for the input,


Dale Draper
Sega Enterprises, Inc. (USA)
Dale.Draper@seu.sega.com
650-632-7555


> -----Original Message-----
> From: Dennis Lovelady [SMTP:dennis@lovelady.com]
> Sent: Tuesday, June 22, 1999 12:15 PM
> To:   MIDRANGE-L@midrange.com
> Subject:      Re: Network dropping AS400
> 
> Hi, Dale:
> 
> Draper, Dale wrote:
>  
> > We just moved our into a different computer room, have new IP addresses,
> > etc.. The problem is, the network keeps dropping our machine. Can get it
> > back up, but after a while it drops off again. Has anyone else run into
> > this? Is there a config I need to do on our machine, or is it the
> network?
> 
> What does the statement "the network keeps dropping our machine" mean?
> What are the symptoms?  I've seen instances where people attempted to use
> a "stolen" IP address, that now happens to match the address of another
> host on the network, and that will definitely cause problems.  If you've
> been given a new IP address and it frequently (but not always) works, I'd
> definitely look into that possibility.
> 
> If the problem is that certain PCs can reach your AS/400 while certain
> others cannot, then someone should look into the hosts (or lmhosts) file
> on the clients trying to connect.  Possibly, some are using hardcoded IP
> addresses in those files, which of course won't work any longer.
> 
> If the AS/400 is on the same subnet as other systems that have no problem,
> I'd bet on the "sharing IP address" problem, though.  ARP information can
> be used to determine who the sharer is, or you can switch to another IP
> address and see if the problem goes away.  If the AS/400 is not the only
> device on the subnet that is failing (in fact, the whole subnet is
> failing) then this would probably be a router/gateway configuration
> problem.
> 
> Bottom line: it depends on the symptoms.  "It doesn't work," the most
> frequently used complaint I have been faced with, has never yet---in 25
> years---led me to a solution.
> --  
> Dennis Lovelady                    Fayetteville, GA
> mail: dennis@lovelady.com          dennis.e.lovelady@ac.com
> URL:  http://lovelady.piedmont.net
> ICQ:  5734860
> --
> "Even if you're on the right track, you'll get run over if you just sit
> there."
>         - Will Rogers
> 
> 
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