On Wednesday, 11/02/2005 at 09:52 CST, Tom Duerbusch
<[EMAIL PROTECTED]> wrote:

> Funny, when I cancelled "VSWCTRL1", then "VSWCTRL2" seemed to be active
> and had taken over communications.  VSWCTRL2 was using a different set
> of addresses (which would have been on our second card, if I had defined
> it so).  Seems to me that I got what I wanted without VIPA...can someone
> confirm that?

Cancelling VSWCTRL1 causes only the failover to VSWCTRL2.  The physical
OSA being used remains.  I.e. QUERY VSWITCH should just show a new
controller.  No change in OSA addresses.  (Don't go by what addresses the
stack is using.

> So, that leads me to the question, what is, or why is VIPA available?

VIPA is there to protect you from a *network* failure.  The VSWITCH
protects you from an adapter/switch failure.

> Is it older technology, that got replaced by vswitch?
Routed Guest LAN and p2p connections were replaced by a switched Guest
LAN.

> Is it a LPAR type technology, for those that don't have VM?
No.  z/VM only.

Alan Altmark
z/VM Development
IBM Endicott

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