MDS 9148 to 9148s Migration

[C2020]

Hello All

I have a pair of Cisco MDS 9148 8Gb switches and I need to replace them with a pair of Cisco MDS 9148S 16Gb switches. I was wondering if I can take a backup of the running config of 9148 and restore it to 9148S. If that works, I was planning to replace 1 switch at a time as all the connected devices have dual path. How should I execute this ?

Do I need to backup/restore anything else apart from running config?

Is there anything else I should skip or overwrite after I restore the backup?

Is there anything that needs manual configuration?

Anything else I should check ?

Thanks

[Bhavin Yadav]

Hi C2020,

Here is what I would do.

Process:

Perform base config of the MDS 9148S (Mgmt IP etc.)

• Check that the MDS 9148S domain ID is numerically higher than the MDS 9148 domain ID

• Connect MDS 9148S and MDS 9148 in the same fabric

• Merge the fabrics, this copies the configuration to the new switch

• Move storage array ports one-by-one to the new switch

• Check host connectivity after moving each port

• Done!

Few things to note (verify):

• Verify and enable enhanced device alias mode

• device-alias mode enhanced device-alias commit

• Create necessary VSANs on the new switch

• Verify and enable enhanced zone mode / smart zone mode

• Switch priority range from 1 to 254, default is 128

• Priority 1 has the highest priority

• During the principal switch selection phase;

• Switch with the highest priority becomes the principal switch

• If configured same priority, the switch with the lower WWN becomes the principal switch

• Domain ID and Priority determines Principal Switch selection

• The principal switch copies its config to all subordinate switches

• Use this behavior to help you migrate to your new switches

• But be careful – make sure right domain-id and priorities are set before connecting them

Here is a nice TAC note / Config example: https://www.cisco.com/c/en/us/support/docs/storage-networking/mds-9500-series-multilayer-directors/117621-configure-MDS-00.html