Rolling stack-upgrade of Catalyst 3750

[cisco]

Hi,

I want to run rolling-stack upgrades on several stacks containing Catalyst 3750X-switches. I have done as follows:

• Configured the redundant uplinks as active and stand-by.
  
• Started to upgrade by using archive download-sw /rolling-stack-upgrade /overwrite /reload tftp://.....
  

The upgrade starts as expected BUT switch number 2 in the stack is reloaded BEFORE switch 1 is finnished, the result is of course downtime for the stack. The documentation says something about the command "boot time", but what is this command doing? The default seems to be 7 minutes, it this parameter the time the upgrade-process waits before booting the next switch in the stack? I would expect that switch number 2 is reloaded when switch 1 is up again after reload, and not after an absolute number of minutes, is the rolling-stack-upgrade not working this way?

Best regards,

Thor-Egil

[Bilal Nawaz · Accepted solution]

Hello

You can use this:

Switch# reload slot ?

<1-9>  Slot number of RP or line card

Switch# reload slot 1

This will reload switch 1. And then you can do switch 2, 3, 4 and so on... manually if you are not comfortable with the 7 mins.

To monitor the upgrade:

show switch  stack-upgrade status
show switch stack-upgrade sequence

Please see http://tech13.com/blog/2013/3/13/main1 for guide on rolling stack upgrade. Courtesy of Tech Onethree.

For your uplinks that keep the network 'up' for whatever is attached to that switch for maximum uptime:

interface interface-id                      <-connection on the Master  switch

rsu active

interface interface-id                      <-connection on the Member  switch
rsu passive

Please rate useful posts and remember to mark any solved questions as answered. Thank you.

[cisco]

Hi and thanks for your answer!

I would like the upgrade-process to handle this without having to manually boot the switches. Do you know why switch 2 is reloaded before switch is up and running after the reload?

Thor-Egil

[Bilal Nawaz]

It's not always that the switch takes 7 mins to reload and come back up, some cases it might take longer... I'm not too sure if it will be aware of a switch that comes back to fully operational before it reloads the other stack member. By the sounds of it, it doesnt!

So boot time command allows you to change this fixed 7 mins from 7 - 30.

You can see: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_58_se/command/reference/cli1.html#wp9678749

In the boot time section.

Hope this helps

Please rate useful posts and remember to mark any solved questions as answered. Thank you.

[cisco]

Thanks, hopefyllu the boot time 30-command will do the trick