ACS Upgrade in live network ok?

[waldronks]

I am about to upgrade our CiscoSecure  ACS from 4.1 to 4.2.  If I do so on a live network, can that affect anything within my network?

I would hate to bring down an entire network and upset about 3000 users.

Thanks in advance!

[Nicolas Darchis]

That will prevent that particular ACS to authenticate new users for the time of the upgrade ...

Existing users won't be kicked out unless you configured a very frequent reauthentication timer.

If you have more than one ACS then the other should be there to take the job

[waldronks]

Thank you!!