Loss of connectivity after reboot B200M4/ESXi6

I've been hitting my head against the wall for long enough, so I hope someone can shed some light on where things have gone so badly.

I recently deployed a UCS environment consisting of the following:

  • 5108 w / blades M4 5xB200
  • 2 x 6248 (2.2 (5A))
  • EMC is 5200 (directly connected iSCSI)
  • vSphere to 6u1
    • ESXi (custom image Cisco) 6u1a with the patch KB2137546 and enic 2.1.2.71

The FIs uplink to a pair of 3850 s (bunk).

The hosts and the virtual machines have been intermittent connectivity problems and poor performance.  Constantly, if I reboot the host, ESXi management connectivity is lost until I have reset within ESXi management network.

On the side of vSphere, I have a pair of vmnic on the management, but also the other production VLAN VLAN and a pair of vmnic for iSCSI.  A standard vSwitch for traffic MGMT and production (aggregation based on the Port ID) and a second standard vSwitch for iSCSI (no grouping) traffic.

I tried a number of things to troubleshoot and resolve the problem. Recently, I discovered the crucial question with 2.2(5a) and performance on the B200 M4 blades.  I upgraded the software to 2.2(5b) this past weekend with no resolution.

At this point, if I reboot a host with two vmnic on the vSwitch. Mgmt, the host will have NO connectivity Mgmt.  If I reset the management network, it responds to the pings.  If I remove a vmnic and a reboot, just restarts happy, albeit without redundancy.

If I let the two vmnic on the vSwitch Mgmt & reboot, no connectivity.  But if I disable one of the network adapters in the UCS Manager, he starts to respond to pings.  As soon as I re - activate the NETWORK card in UCSM, pings are deleted.

So I am at a loss.  Any idea?  Thank you

Greetings.

Looks like you can hit https://tools.cisco.com/bugsearch/bug/CSCuv00089/?reffering_site=dumpcr

You can open a tac case to confirm.  If this is the problem, then an upgrade on 2.25 c or more is resolved.

Thank you

Kirk...

Tags: Cisco DataCenter

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