04-30-2025 02:55 AM
Hello Guys,
I am having WS-C4500X-32 which are deployed in VSS and i am planning IOS upgrade.
I have checked few community forums and cisco document and i am bit confused now, I found 2 options, can you please help to suggest which one is good?
Option1
1.Copy the IOS from the TFTP server to the active unit using the command "copy tftp://<TFTP IP address>/IOS_filename.bin bootflash:";
2. Copy the IOS from the TFTP server to the standby unit using the command "copy tftp://<TFTP IP address>/IOS_filename.bin slavebootflash:";
3. Remove the old boot variable string: no boot system flash
4. Change to the new boot variable string: boot system flash bootflash:IOS_filename.bin
5. Change the config-registry value to 0x2102: config-registry 0x2102
6. Save the config.
7. Reboot. ( will reboot from active switch will upgrade both active and member switch?)
Option2
Same steps but during reboot , need to use below
1)Standby switch will be reloading for IOS upgrade in standby device.
we will verify current IOS in peer switch with show module command
2) Now master device will be reloaded for IOS upgrade.
Any issues if do separate reload?
04-30-2025 03:56 AM
I am familiar with Option 1 because, if I am not mistaken, that is my procedure.
04-30-2025 05:55 AM
Hi Leo,
Yes, but just want to confirm
Reboot. ( will reboot from active switch will upgrade both active and member switch?)
04-30-2025 03:56 PM
When I upgrade VSS (4500 &/or 6500) I always use the "reboot" command. I will never use the Cisco-recommended "redundancy" commands.
When the "reload" command is used, both the Active and the Standby until will reload. However, if both units are within the same location, I strongly recommend cold-reboot both units because it will clean out a lot of stuff that would remain in a "reload".
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