SAN switch migration in NetApp Storage environment

Hi All,

We are doing a SAN migration project wherein we will be replacing the SAN switches from broacade to Cisco Nexus 5596UP. The Storage array is NetApp v3170 running ONTAP version 8.0.2 P1 7-mode. Now on each netapp controller we have 4 fiber channel ports out of which 2 are used and 2 are unused. All these ports are configured as targets. The name of the controllers are netapp1a and netapp1b (each controller having 4 fiber ports) and configured in single image mode.

Now, I want to connect the unused 2 ports from each controller to new switches without disrupting the current connections, currently the initiators or hosts are connected to 0a and 0d while 0b and 0c are not in use. Once this is connected, is there any else I need to worry from NetApp perspective for enabling that unused fiber ports. I will do the zoning on the new switches.

After this, I have to work on moving the SAN connected hosts (SQL servers running on windows 2008 SE) from old switch to new switch. Can anybody share the steps on what needs to be done to migrate the servers online without taking the downtime. As these servers are multipathed, I would like to know how I can move one path at a time so that there is less downtime of the server involved in the migration. If any of the experts has done this before, please share the procedures or steps of doing that on cisco + NetApp configuration?

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arnoldConnect With a Mentor Commented:
The response is a general to an FC infrastructure switch transition.
What you have to make sure is that your allocated LUNS are configured for access on all netapp ports/processors.
You then configure the zoning on the switches.
Presumably each system has two paths to the Existing switches. You can the transition an HBA from the current switch to one of the new switches. Zoning the HBA to access the SAN and then making sure the access via this HBA remains. Then transition a second HBA to the other new switch.
virgo0880Author Commented:
So, if I make my allocated LUNs configured on all the netapp ports, there will be more paths available on the host side and then I can migrate the hbas one by one, is that right?
Generally yes.  You have to make sure you correctly zone the connections you are moving on the new switch.
virgo0880Author Commented:
I have scheduled the migration next week. Thank you for the response, I will revert back if I have any questions.
virgo0880Author Commented:
I was able to successfully completed the Switch migration. I did following things from my end to make the transition smooth:

1. Verify all the servers are multipathed.
2. Configure the zoning on the switches before the migration activity and verify the configurations.
3. Disconnect one path, connect to the new switch and verify the disks are online and then move ahead with the next path.

-- Virgo
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