thank you for your answeer
Actually, I have a flex system with 1 Fsm and 2 CMM, 8 compute node and two switch
Version FSM: 1.3.1
Version FSM: 2.5.1 (2PET12D)
Version Compute node: 1.2.1
My Fm is connected to the internet.
I tried to upgrade the fsm, but without success.
So I upgrade the CMM from 2.5.1 to 2.5.3u
All my compute nodes are running correctly, but in FSM GUI, the Communication between fsm and chassis is offline so I can?t do anything (discovery, upgrade,?)
Even more my tsm server is running correctly, but in the fsm shows bay empty
After I upgrade CMM, I lose access to IMM compute node
Hits may be I misunderstand this prerequisite
Level of Recommendations and Prerequisites for the update: (https://delivery04.dhe.ibm.com/sar/CMA/XSA/05ex8/0/ibm_fw_cmm_2pet12u2.5.3u_anyos_noarch.txt
? If the CMM is being managed by an IBM Flex System Manager (FSM), If the CMM is being managed by an IBM Flex System Manager (FSM), you must ensure the FSM is at the 1.2.1 level. If not, then you must update the FSM first before updating the CMM and other chassis components. See Flex Update Best Practices for details on how to update the FSM and all chassis components