On Thursday, 07/21/2011 at 11:33 EDT, Rob van der Heij <rvdh...@gmail.com> wrote: > On Wed, Jul 20, 2011 at 8:29 AM, Crispin Hugo <crispin.h...@macro4.com> wrote: > > > Am I right to assume, if I am clever(?) with the configuration, I could > > connect all 15 LPARS to each other with CTCÂ’s ? > > If you also plan to run ISLINK connections between them, you need to > be careful. We had lots of problems in the past when multiple paths > exist between a pair of systems. You can't avoid "through" connections > to build, so while you're bringing up system various indirect > connections already are active. When that intermediate system goes > AWOL, you have lost your conversation anyway.
In a Single System Image cluster, you have to have fully interconnected ISFC links. No hops. Redundancy is provided by allowing multiple ISFC links between any pair of systems. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
