VMware: ESXi 6 503 Service Unavailable endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x1f098b08] _serverNamespace = / _isRedirect = false _port = 8309)

Summary:
Basically I enabled SR-IOV on the only two pNIC's I had in my ESXi host in my lab.  This doesn't necessarily cause a connectivity problem, but the ESXi management agents did not like this at all.  Meaning I could connect to my hosts, as evident in the error message, but the agents basically broke once SR-IOV was enabled on the only two physical uplinks I had.



Workaround:
Unfortunately, the only workaround I've found is to:

  • "Reset System Configuration" from DCUI
    • This basically bring ESXi back to default install config.  root password is blanked out, etc. etc.
or
  • Re-Deploy the host. 
For my testing though, I can enable on one of the physical uplinks and work w/ that just fine, just not both in my case.  The other aspect that I didn't realize is that the CNA cards I was using lose their Fiber Channel connectvity as well.

SR-IOV effectively changed my CNA cards to NIC adapters only.

Config:
ESXi 6.0 Build 5050593
Dell FX2 - FC630 - Qlogic 57810 adapters

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