09-28-2020 04:45 PM
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
09-30-2020 05:07 PM
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
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