Well - if you're willing to swap around OSA addresses -- you should be able to pinpoint if it's that particular OSA. I'm assuming you have no issues with the z/VM access (which uses native)?
There may be clues in the microcode update notes as well <shrug>.. I would start with verifying the OSA is configured correctly at the HMC ... if all the OSA's are defined the same -- and only the one performs bad -- guess it's time for a CE to check out the OSA. Does seem suspicious it coincides with a microcode update though. Scott Rohling On Mon, Aug 9, 2010 at 4:16 PM, Daniel Allen <[email protected]> wrote: > For the native OSA addresses, we were using 104, 105 and 103. For our > VSWITCH we used 109, 10A and 10B. z/VM TCPIP uses 10C, 10D and 10E. > > > > *From:* The IBM z/VM Operating System [mailto:[email protected]] *On > Behalf Of *Scott Rohling > *Sent:* Monday, August 09, 2010 3:02 PM > *To:* [email protected] > *Subject:* Re: Interesting OSA problem > > > > Hmm -- seemed to start with the microcode update ... Have you rechecked > your OSA values at the HMC since the microcode update? Make sure they are > right speed, mtu - etc... > > You didn't say if your vswitch is connected to a different OSA, but am > assuming it is? Doesn't make sense at first glance ... but it all depends > on what the 'bad OSA' is connected to -- any chance there were also network > changes to switches/routers/etc that might explain? Things like MTU size > difference can cause slowness and hangs.. > > Scott Rohling > > On Mon, Aug 9, 2010 at 3:50 PM, Daniel Allen <[email protected]> wrote: > > We are running a z9BC with z/VM 5.4. > > > > Prior to the microcode upgrade a week ago Saturday, our OS/390 guest used > native OSA addresses and our z/OS guests (1.4 & 1.5) used a VSWITCH. After > the microcode upgrade, our OS/390 guest (using native OSA addresses) was > communicating very slowly with a TN3270 terminal. We also tested one of our > z/OS (1.4) guests using native OSA addresses and communication with a TN3270 > terminal was also very slow. When I put the z/OS (1.4) guest back to using > the VSWITCH, everything is fine. The microcode level is 67. > > > > Over a year ago, we replaced the OSA card because of another problem. > > > > Is the OSA card having problems ? > > > > Is the VSWITCH doing something to make older operating systems work ? > > > > > > > > >
