Vern,

Anything that uses TCP/IP has to worry about clearing ARP.

http://www-912.ibm.com/s_dir/SLKBase.nsf/0/19f485a7a903204586256f97007fa9fc?OpenDocument

HTH,
Charles


On Thu, Apr 14, 2011 at 10:37 AM, Vern Hamberg <vhamberg@xxxxxxxxxxx> wrote:
The trouble with this, Dennis, so far as I can see, is that this box
isn't UNIX - we have never had to think about clearing ARP on this box.
I don't know if there is even a way to do it.

Perhaps that is accomplished by the system when restarting TCPIP - maybe
with some other command.

This system, as you know, is positioned as not needing all that
administrative stuff other OS' do.

So is there a way to clear the ARP? It'd be an interesting thing to know.

Thanks
Vern

On 4/14/2011 9:13 AM, Dennis wrote:
It is a general rule-of-thumb in the unix world: If you replace a switch, clear ARP.  If you replace a router, clear ARP.  Seems to avoid a wealth of issues.

"Gqcy"<gmufasa01@xxxxxxxxx>  wrote:

On 4/14/2011 7:43 AM, Don Cavaiani wrote:
Last night we put in all new switches, and quickly replugged the IBM
i
Ethernet cable, and the system went on running, telnet for sure.

However, the http servers no longer connected.  This morning I
re-started all the HTTP servers, but we were still unable to connect.

I then did an IPL which brought everything back up.


In my experience, _every_time_ we unplug the Ethernet cable, we had
to at a minimum end and restart TCP/IP, and sometimes vary off and on
the controller...
ymmv...

-gerald

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