CSS Box-to-Box software upgrade

gbowling1 · ‎10-27-2009

I'm getting ready to upgrade two CSS's in box-to-box redundancy mode.

The upgrade is simple enough, but what are the best practices for two boxes in box-to-box?

I suppose I can copy the software up to the master box. Then force the standby box to be master and copy up the software to the standby.

Perform the upgrade/reboot on the standby. Then once the standby is again operational, do the master.

Seems cumbersome. Any suggestions?

jason.espino · ‎10-27-2009

I would suggest upgrading and rebooting the secondary CSS, then do the primary. Â However, I would suggest you verify the APP session status between the 2 CSS's BEFORE upgrading and rebooting the primary. Â If you can ensure APP session communication between the load balancers you should be okay to perform the upgrade on the primary device. Â In my opinion this is the better if the two options you have outlined.

- JasonÂ

gbowling1 · ‎10-28-2009

Ok, how can I get the software ftp'd to the secondary without forcing it to be master?

In box-to-box the interfaces on the secondary don't work with the exception of the redundancy-protocol interface which is just a cable between the two boxes.

Seems like I have to force the secondary box to be master to get the software over there, then flip it back. After that I could do as you suggest.