Upgrade CSS

Unanswered Question
Sep 3rd, 2007


Does anyone knows a way to upgrade a CSS with "VIP Interface Redundancy" with zero downtime?

This is because when i upgrade the master, the services switch to the backup but as soon as it comes up the master take the services back, and I needed to keep the backup Up with the services.

kind regards,


I have this problem too.
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Gilles Dufour Tue, 09/04/2007 - 03:51

I would say, upgrade the backup, then reboot the backup, then change the priority on both active and standby so that the standby becomes active and upgrade the 2nd CSS.

The master takes the services back after reboot probably because you have preempt configured.

So you can try your method without preempt.


rodriguesl Tue, 09/04/2007 - 05:36


Ok, you're right.

But that is more a kind of workaround. Do you know any other away?




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