On Monday, 08/24/2009 at 02:19 EDT, "Dean, David (I/S)" <david_d...@bcbst.com> wrote: > We had a situation where one of our OSA links died, but failover did not
> occur. It appeared to us that the zVM was not aware that the card was actually > ?down?. This seemed similar to what you were referencing. I could be wrong?.. There can be failures where OSA does not notify the host of a failure. The VSWITCH was designed to detect an OSA "stall". TCP/IP's OSD device driver was not. I am rapidly moving to the opinion that VM TCP/IP should use a VSWITCH and let the VSWITCH handle failover at the hardware level rather than needing multiple IP addresses, VIPAs, and dynamic routing. When VSWITCHes first became available, I was reluctant to put all my eggs in one basket. Now, however, "no problem." Alan Altmark z/VM Development IBM Endicott
