The z/OS systems are in separate LPAR's.
Dennis O'Brien
My computer beat me at chess, but it was no match for me in kickboxing.
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Mark Pace
Sent: Wednesday, September 02, 2009 05:57
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: [IBMVM] Duplicate hipersocket device addresses
I'm impressed that you have it intermittently working. I've never
gotten a Hipersocket connection in z/OS as a VM guest to work. One of
my colleagues is working with IBM on this problem.
On Tue, Sep 1, 2009 at 7:45 PM, O'Brien, Dennis L
<dennis.l.o'br...@bankofamerica.com
<mailto:dennis.l.o%27br...@bankofamerica.com> > wrote:
We're starting to test hipersockets between Linux guests on z/VM and
z/OS systems in separate LPAR's. z/OS is having intermittent trouble
pinging one of the four Linux guests, but is fine with the other three.
All four Linux guests have no trouble pinging z/OS. Someone suggested
that the device addresses used have to be unique among all the LPAR's.
E.g. if z/OS in LPAR 1 allocates FC00-FC02, then I shouldn't allocate
real FC00-FC02 on z/VM in LPAR 2 to a Linux guest, but should start with
FC03 or FC04. I've never heard of such a restriction, and the source of
the advice is suspect. Is there such a restriction? I found a Redbook,
"e-Business Intelligence: Data Mart Solutions with DB2 for Linux on
zSeries", SG24-6294-00, that used the same addresses on z/OS in one LPAR
and a Linux guest in another LPAR. Note that the z/OS TCP/IP
configuration doesn't specify UCB's, just CHPID numbers, but z/OS
allocates the lowest three UCB's on the CHPID.
If the device addresses aren't the problem, what else should I look at?
The TCP/IP configurations on the Linux guests are identical, except of
course for the IP address. The intermittently-working guest has an IP
address that ends in ".1". I know that ".1" addresses are customarily
used for routers, but there are no routers in this configuration.
Dennis O'Brien
My computer beat me at chess, but it was no match for me in kickboxing.
--
Mark Pace
Mainline Information Systems
1700 Summit Lake Drive
Tallahassee, FL. 32317
