On Saturday, 01/11/2014 at 02:17 EST, Raymond Higgs/Poughkeepsie/IBM@IBMUS wrote: > The other Chris said they were using Brocade. I believe Brocade also > recommends either port, or WWPN zoning. So no mixing port and WWPN > zoning.
I believe that Brocade recommends WWPN zoning as Best Practice, leaving port zoning only for very specific use cases. (I would say where you're in an experimental/test environment where you don't know what WWPNs are expected.) > The toughest aspect of making zones too big is that it isn't apparent > right away. The symptoms do not show up until events like fibre pulls, > pchid/chpid/switch port vary off/on, guest IPL/shutdown, etc happen. Error recovery seems to be the worst aspect of FC. I think SANs (switches, HBAs) are still a good distance behind the large-scale virtualization curve. If you exceed the various real-world vendor-imposed operational limits, there are typically no problems when everything comes up in a nice sequence with time delays, but when you plug something in or power something on, all hell breaks loose. To be forewarned is to be forearmed. ;-) 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 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
