You've hit the problem, we have two z196 processors that are STP
capable, but can't have the 9037's attached, and one z10 where we can
attach the sysplex timers, but that processor doesn't have the STP feature.
Mark Jacobs
On 02/06/14 09:05, Dana Mitchell wrote:
On 02/06/14 06:38, Scott Chapman wrote:
I believe that you can have a mixed CTN where one CEC doesn't have STP, but in
that case the external time source must be
the 9037 and I'm pretty sure that at least one of the CECs must be both STP and 9037
capable. I don't know what the implications > are from converting from a pure STP
environment back to a mixed environment, but it seems like when we did the conversion
to > STP there was some sort of fall-back provision.
The STP Implementation Guide Redbook SG24-7281 describes migrating from
STP-only CTN to Mixed CTN. They add this caution:
A migration from STP-only to Mixed CTN may take considerable time due to the
potential
difference in time between the Current Time Server and the Sysplex Timer, at
the start of the
migration. Once the migration is selected, the STP facility will need to steer
the Coordinated
Server Time (CST) towards the time being provided by the Sysplex Timer.
On Thu, 6 Feb 2014 07:27:15 -0500, Mark Jacobs <mark.jac...@custserv.com> wrote:
That was what we originally though too, but our local IBM support person
told us we couldn't. Thinking further about configuration activities to
migrate to mixed CTN mode, I'm not seeing how on the non STP capable
processor we're going to be able to set the name of the mixed CTN, since
it isn't going to have the STP tab for that CEC,
In a mixed CTN, one or more CECs can be only attached to the 9037's and not
even required to be STP capable. There must be at least one CEC that is STP
capable and attached to 9037's.
Dana
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Mark Jacobs
Time Customer Service
Tampa, FL
----
The quiet ones are the ones that change the universe...
The loud ones only take the credit.
Londo Mollari - Babylon 5
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