On Tuesday, 06/16/2015 at 12:50 EDT, Mark Post <mp...@suse.com> wrote:
> >>> On 6/15/2015 at 11:54 PM, Alan Altmark <alan_altm...@us.ibm.com>
wrote:
> > Neither z/VM nor Linux have to specify a portname (real or virtual). I
> > recommend that you do NOT specify the portname.
> >
> > I don't understand why the distros still worry about the portname. We
got
> > rid of the requirement for z/VM and Linux on the z900 and z800 back in
> > 2003. Just issue a msg that it's obsolete and ignore it.
>
> Even for Linux in an LPAR sharing an OSA with a z/OS system that is
specifying
> (their equivalent of) a portname?
Yes, even then. You can google "OSA portname relief". I've posted this a
few times, from October 2003:
An OSA-Express microcode update for the IBM zSeries z800 and z900 machines
became available today that makes the portname optional for the
OSA-Express in QDIO mode. The update is Driver 3G - EC stream J11204,
MCL032 (OSA level 3.33).
This is a functional change that has already been made for the z990 and is
now backfitted to earlier hardware levels.
z/VM has released two APARs in support of these changes at the z/VM 4.3.0
level (these were already included in the z/VM 4.4.0 base):
VM63308 - PORTNAME relief for z/VM Guest LAN
PQ73878 - VM TCP/IP exploitation of PORTNAME relief
If you are using real OSA-Express devices in QDIO mode and have the
hardware update applied, the PORTNAME is no longer required when
configuring OSD devices. For compatibility, OSA-Express will permit
activation with or without a PORTNAME.
For the z/VM Guest LAN environment with VM63308 applied, the portname
specification is also optional.
Prior to this change, if you were sharing an OSA-Express, you needed to
configure matching names for all shared devices. If a mismatch occurred,
activation would fail. Now you can omit the portname.
The "June 2003" Linux distribution also contains support for portname
relief. The portname is still required for z/OS.
Alan Altmark
Senior Managing z/VM and Linux Consultant
Lab Services System z Delivery Practice
IBM Systems & Technology Group
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott
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