Unsolved
This post is more than 5 years old
9 Posts
0
1234
May 14th, 2010 13:00
San Migration FC ID Question
I'm migrating from Cisco MDS switches to Qlogic 5802 switches. I have 4 AIX and 2 HP/UX boxes on this Fibre SAN that are causing me concern. I want to migrate on fly. Because of the AIX and HPUX I think I may have to bring them down. My question is if anyone has ever migrated hosts from one san to another by setting the FCID on the switch port and did this make the migration transparent to the devices in AIX and HPUX? I have a question into our Qlogic rep to see if it is possible to match the FCID from Cisco to Qlogic.
No Events found!
AbhishekKS
71 Posts
0
July 14th, 2010 04:00
Hi Kwhite,
It is possible to migrate your hosts from one SAN to other, without the operation being disruptive, if that is what you want to do, when you say, 'on the fly'. You will have to ensure that the hosts and the storage have redundant paths over both the fabrics and once both the paths are available you may bring the Cisco MDS fabric down so that the Qlogic fabric path comes up. FCID is generated when the device logs in to the fabric and is decided by the switch based on a logic, so I don't think you may assign them, also I don't think there is a need. If this how you do it, the process will be transparent to the hosts.
Thanks.
dynamox
9 Legend
•
20.4K Posts
0
July 14th, 2010 04:00
fcid is very important to HPUX and AIX, you can not disregard that when you are migrating those two OSs.
AbhishekKS
71 Posts
0
July 14th, 2010 10:00
Yes FCID is important, as based on this the ctd value is calculated in OS like HPUX. However if we have a redundant path through the new fabric (here Qlogic) which points to the same device using the multipathing software, we can get rid of the previous fabric path (through MDS) without worrying about the FCIDs as we don't have to point to that device (through MDS fabric) again, we already have that device through the new path. As the Qlogic path would still point to the same device with a different set of ctd value. Thus this will be transparent to the host, thanks Dynamox, for bringing up this detail.