update an SBC 3900 HA Cluster with IPSEC from ECZ8.1.0 MR-1 Patch 22 to ECZ8.1.0 MR-1 Patch 25B
I found the following hint in the release Notes and my customer use IPSEC
###########################################
If upgrading TO any of the following releases FROM any prior release and you have IPSEC or IMS-AKA enabled and are configured in a High Availability configuration, an In-Service upgrade is not supported.
Cz810m1p23, Cz810m1p24, SCZ830m1p5, SCZ830m1p6, SCZ830m1p7, SCZ830m1p8
You must upgrade both systems in the HA Pair and perform a simultaneous reboot for HA synchronization to work in the above upgrade scenario.
###########################################
Now I have a question, can I first update the standby SBC and reboot the standby SBC and when I sure that the standby SBC starts (logon works) with the new Version first than I make the simultaneous reboot or give this problems?