Cisco Stacking Switch Redundancy Firmware Upgrade

[kutysam87]

Hi guys,

I have a quick question on the C3750 switches.

Lets say I have 2 switches stacked together for redundancy, meaning Server A has connection to Stack A and Stack B.

I would like to upgrade the firmware of the stacked switches.

How do i ensure when that redundancy is there when I upgrade the firmware of the switches?

My concern is, if i upgrade the firmware through the master switch, a reload command has to be issued thus, rebooting both switches together.

Thank you.

Regards,

Kuty

[Leo Laohoo]

My concern is, if i upgrade the firmware through the master switch, a reload command has to be issued thus, rebooting both switches together.

3750 only?  Won't help because 3750E/X support rolling stock upgrade (RSU).  

If one of the members of the stack gets reloaded, that member won't be able to join the stack due to software incompatibility. 

There is no choice but to invoke a full-stack reboot.

[kutysam87]

Hi Leo,

Thanks for your reply. Its a 3750X switch.

So am I right to say, there is NO redundancy for upgrading iOS when it comes to stacking switches?

[Leo Laohoo · Accepted solution]

So am I right to say, there is NO redundancy for upgrading iOS when it comes to stacking switches?

Ok, so it's 3750X.  Then read this:  Rolling Stock Upgrade

[kutysam87]

Thank you for your reply! That article clearly states what I'm looking for.