After the upgrade of OMS 10.2.0.5 to 11.1 in my test environment, I started upgrading some of the remote agents.
OEM GC 11.1 includes an Upgrade Agent feature that allows you to upgrade the 10.2.0.5 Agent to 11.1 on multiple nodes at once.
Check out this document to see what I did and how easy it is.
Upgrading Agents OEM Grid Control 11.1
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Could you share the following information:
1. how many agents did you upgrade at once ?
2. i believe the oemgc uses ssh , so did you setup ssh between EM and nodes separately ?
I upgraded 2 Agents at once.
Yes you need to setup ssh equivalancy.
This is described in the install guide