Let’s go over how to disable the “This host currently has no management network redundancy” message. It’s annoying and we can get rid of the yellow triangles that show on the hosts due to this message. And I know, you “should” have redundancy on your management network but we’re just not worried about it. Our hosts are in our building and not at a co-lo so we have constant access to them in the event something happens and we need access.
Since we don’t care about this warning, I wanted to hide it. This way we can see if there are actual errors on the host and not some warning about network redundancy. The fix is done with an advanced option in the cluster properties. In the cluster properties, under vSphere HA, select Advanced Options. Then add an option named das.ignoreRedundantNetWarning and set the Value to true.
And that’s it! Once the option is in, go to each host and reconfigure for vSphere HA. The warning will then disappear and your vCenter will look clean again.
A recent issue I was having was that our ESXi 5.1 hosts would go “out of sync” with the VDS. The only fix that would work was rebooting the host. After digging into the log file, I discovered that the host was failing to get state information from the VDS. The entries are below:
value = “Failed to get DVS state from vmkernel Status (bad0014)= Out of memory”,
message = “Operation failed, diagnostics report: Failed to get DVS state from vmkernel Status (bad0014)= Out of memory”
The issue is a bug in the version of 5.1 we were running (Update 2 at the time) and is a memory leak on the host when using E1000 NICs in your VMs. Because these VMs were created a long time ago, they were defaulted to the E1000. The fix for this issue is updating to the latest build of ESXi which has a fix for the issue. And also, don’t use E1000 NICs, always go with VMXNET3. Problem solved!