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EVC mode blocks new host.

  • 1.  EVC mode blocks new host.

    Posted Feb 13, 2018 11:14 AM

    Hello. I have strange issue with vcenter 6.5. I created clusted with EVC mode to Ivy Bridge and trying to add Supermicro X10DRL-i with 2620v4 CPUs (obviously newer than ivy bridge). And i get an error saying that CPUs on target host are missings feathers, i double check bios and everythign is enabled there.

    Also trying to add E3-1240 V2 host to this cluster and get same error.. Please where to look?



  • 2.  RE: EVC mode blocks new host.

    Posted Feb 13, 2018 01:33 PM

    Hi!

    What is VC build you use? And what is ESXi build number?

    Do you have running VMs on host you trying to add into cluster? Is that host is already managed by vcenter?



  • 3.  RE: EVC mode blocks new host.

    Posted Feb 13, 2018 04:23 PM

    Hi! 2620v4 host is running only vcenter machine, 1241v2 host doesnt run any vms.

    Vcenter is: 6.5.0-7515524

    both hosts are: 6.5.0.update01-5969303



  • 4.  RE: EVC mode blocks new host.

    Posted Feb 13, 2018 05:38 PM

    Not sure whether this helps, but IMO the latest reply at Re: VCSA 6.5 7515524 any one having issues with adding hosts to existing EVC cluster.(disabling/enabling EVC) sounds helpful.

    Maybe worth a try, but it's up to you.

    André



  • 5.  RE: EVC mode blocks new host.

    Posted Feb 13, 2018 09:55 PM

    Sadly that didnt help, tried both last and pre-last advices..



  • 6.  RE: EVC mode blocks new host.

    Posted Feb 14, 2018 07:38 AM

    Try to update ESXi hosts to the latest available build - 7388607.



  • 7.  RE: EVC mode blocks new host.

    Posted Feb 14, 2018 11:56 AM

    i upgraded hosts, rebooted VCSA - no success... I dont get it really.



  • 8.  RE: EVC mode blocks new host.
    Best Answer

    Posted Feb 14, 2018 12:10 PM

    Ok.

    Try in another way - create a cluster without EVC, add host to it and then enable EVC.



  • 9.  RE: EVC mode blocks new host.

    Posted Feb 14, 2018 05:58 PM

    Jeeesus... this worked. Really... why 6.5 is soooooo tough. Doesnt feel like enterprise to me now. Never had any problems with 5.5.

    The soultion was: upgrade all hosts to latest release (i believe that was required), then turn off EVC -> add hosts -> turn on EVC



  • 10.  RE: EVC mode blocks new host.

    Posted Feb 15, 2018 07:52 AM

    Some other users report issues with EVC when they couldn't add new hosts to existing EVC cluster

    VCSA 6.5 7515524 any one having issues with adding hosts to existing EVC cluster.



  • 11.  RE: EVC mode blocks new host.

    Posted Feb 13, 2018 07:08 PM

    Could it be that Intel Microcode updates have been applied to some hosts (via BIOS update or January ESXi patches) ? These add new CPU features.



  • 12.  RE: EVC mode blocks new host.

    Broadcom Employee
    Posted Feb 16, 2018 09:12 AM

    Here is root cause and simple workaround for empty/existing EVC cluster issue: http://vthinkbeyondvm.com/adding-host-empty-evc-cluster-fails-simple-workaround/



  • 13.  RE: EVC mode blocks new host.

    Posted Feb 16, 2018 09:37 AM

    It's better to create a KB article for this issue.



  • 14.  RE: EVC mode blocks new host.

    Posted Mar 05, 2018 11:10 AM

    This is expected behaviour when running VCSA 6.5 Upd 1e (although, VMware made it easy to miss this information..)

    VMware vCenter Server 6.5 Update 1e Release Notes -> under resolved issues -> security issues, see link to VMSA-2018-0004.2

    * The new versions of vCenter Server set restrictions on ESXi hosts joining an Enhanced vMotion Cluster, see VMware Knowledge Base article 52085 for details.

    The patches which exposed the necessary patches (ESXi650-201801401-BG & ESXi650-201801402-BG) have been withdrawn, so workaround would be as already suggested in this thread; disable EVC - Add host to cluster - re-enable EVC

    A big mess, all of this Spectre/Meltdown patches... :smileyplain: