Chris, Yes, there is port zoning, but all of the vendors will recommend small zones, and port zoning does not encourage small zones. When setting up zoning, it is the number of virtual ports in it that matter. Port zoning makes it easy to ignore the virtual considerations because you are working with physical resources. Extra care is needed to avoid making a zone too big, and sometimes it only takes an add of 1 port.
Fibre channel has a notification mechanism called state changes. Whenever a virtual nport logs in or out of the fabric, all of the other virtual ports in the fabric are notified by the fabric controller service running on the switch(s). This can be a very big burden on the switch fabric. The switch vendors have recommendations about zone sizes which are much smaller than their consoles will let a person set up. For the most part, newer switches will work with larger zones so people really need to check for the hardware that they have. 600 Luns was mentioned in another email. If this means 600 NPIV subchannels, then 1 giant zone with 600+ members would be too big! 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. 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. Regards, Ray Higgs System z FCP Firmware Development Bld. 706, B42 2455 South Road Poughkeepsie, NY 12601 (845) 435-8666, T/L 295-8666 rayhi...@us.ibm.com Linux on 390 Port <LINUX-390@vm.marist.edu> wrote on 01/10/2014 02:37:10 PM: > From: "burgess, christopher" <christopher.burg...@emc.com> > To: LINUX-390@vm.marist.edu > Date: 01/10/2014 04:30 PM > Subject: Re: Question on WWPN WP > Sent by: Linux on 390 Port <LINUX-390@vm.marist.edu> > > You don't have to zone by WWPN. In the switch you can set up your > zones by port number and then make sure the cables are in the right ports. > > Thanks, > Chris Burgess > Phone: 1-800-445-2588 x42149 > 1-508-249-2149 > Fax: 1-508-497-8027 > Email: christopher.burg...@emc.com > > > > > > > > -----Original Message----- > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf > Of Raymond Higgs > Sent: Friday, January 10, 2014 2:27 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Question on WWPN WP > > Chris, > > I don't agree with that. My memory is foggy because there are so > many storage array vendors and their consoles are all different. I > haven't run across one that doesn't let you enter WWPNs manually. > It isn't always easy to find, and might be through a CLI, but it is > always there. > > So, I bet you have 2 options: > enter them in some manual way > drag and drop with the GUI as you have been advised > > Regards, > > Ray Higgs > System z FCP Firmware Development > Bld. 706, B42 > 2455 South Road > Poughkeepsie, NY 12601 > (845) 435-8666, T/L 295-8666 > rayhi...@us.ibm.com > > Linux on 390 Port <LINUX-390@vm.marist.edu> wrote on 01/10/2014 12:38:25 > PM: > > > From: "Will, Chris" <cw...@bcbsm.com> > > To: LINUX-390@vm.marist.edu > > Date: 01/10/2014 12:40 PM > > Subject: Re: Question on WWPN WP > > Sent by: Linux on 390 Port <LINUX-390@vm.marist.edu> > > > > Our issue is that z/VM and the zLinux guests have to be up and the > > npiv channel logged in before the new NPIV WWPN can be zoned from the > > SAN side. At least this is my understanding with EMC storage. > > > > Chris Will > > > > -----Original Message----- > > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of > > Scott Rohling > > Sent: Friday, January 10, 2014 12:28 PM > > To: LINUX-390@VM.MARIST.EDU > > Subject: Re: Question on WWPN WP > > > > I'm not familiar with the WPT tool, but my experience using NPIV would > > leave me to believe that the tool simply tells you what you're new > > WWPN's will be for the FCP channels, so that you can get zoning, etc > > established > > before migrating to it. I don't believe you'll have to change > anything > > on the Linux guests - as the target WWPN's on the fabric won't change > > - only the WWPN associated with the virtual device you attach to the > > Linux > > guests will. So if you know which virtual devices you'll use - they > can > > zone things so those new WWPNs have access to same SAN as the old. > > Then you should be able to come up on the new box without changinganything. > > After you migrate - they can remove the old WWPN's from the zoning. > > That's my understanding, but my experience is mostly on the z/VM side > > and using EDEV with NPIV WWPN's.. I assume the same concepts apply to > > Linux guests directly attaching the stuff.. > > > > Scott Rohling > > > > > > > > > > On Fri, Jan 10, 2014 at 8:47 AM, Will, Chris <cw...@bcbsm.com> wrote: > > > > > We are migrating from a Z10 to an EC12 mainframe and have questions > > > about the WPT tool. Can we use this to import our existing NPIV > > > WWPN definitions from the Z10 to the EC12 so we do not have to > > > reconfigure the SAN definitions? If not, how does the WWPN > > > prediction tool help if we have to bring the new system and zLinux > > > guests up to do the SAN configuration? We are using EMC storage > > > with directly attached zfcp > LUNs. > > > > > > Chris Will > > > Systems Software > > > (313) 549-9729 > > > cw...@bcbsm.com > > > > > > > > > > > > The information contained in this communication is highly > > > confidential > > > > and is intended solely for the use of the individual(s) to whom this > > > communication is directed. If you are not the intended recipient, > > > you are hereby notified that any viewing, copying, disclosure or > > > distribution of this information is prohibited. Please notify the > > > sender, by electronic mail or telephone, of any unintended receipt > > > and > > > > delete the original message without making any copies. > > > > > > Blue Cross Blue Shield of Michigan and Blue Care Network of > > > Michigan are nonprofit corporations and independent licensees of the > > > Blue Cross > > > > and Blue Shield Association. > > > > > > -------------------------------------------------------------------- > > > -- 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/ > > > > > > > ---------------------------------------------------------------------- > > 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/ > > > > > > The information contained in this communication is highly confidential > > and is intended solely for the use of the individual(s) to whom this > > communication is directed. 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