yes because the switches in the production network are at 4.1.3, so I will not have this problem. I already upgrade the VCS cluster (6710, 6730 and 6740) at the lab network and everything went fine. They were at 4.1.3 also. The VDX with the auth problem are from backup network, almost every server in that network are standby, and as I said everything work fine.
The cluster VCS at production network is VDX6740T, and my request for upgrade version path to Extreme Network support team, was related to this specifics servers.
Answering your question, yes I have AAA configured. For the test you're recommending, I have to wait to have someone there.
Thanks in advance.