Dell EMC VxRail: "Operation Timed out" error while configuring HA in vCenter Server

Summary: When configuring HA, it reports a time-out on vCenter.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

HA fails on some hosts. When checking the /var/log/fdm.log, we find errors similar to: 
[ClusterManagerImpl::ConnectToMaster] Couldn't connect to primary N7Vmacore16TimeoutExceptionE(Operation timed out)
[ClusterManagerImpl::AddBadIP] IP <x.x.x.x> marked bad for reason Unreachable IP
[ClusterElection::ChangeState] SlaveConnecting => Startup : SlaveConnectingStateFunc
[ClusterManagerImpl::IsBadIP] <x.x.x.x> is bad ip

Cause

This issue occurs when Jumbo Frames are enabled on the host Management Network (VMkernel port that is used for host management). A network misconfiguration prevents hosts communicating using Jumbo Frames. It is supported to use Jumbo Frames on the Management Network if the MTU values and physical network are set correctly.

Resolution

To resolve this issue, ensure that the network supports Jumbo Frames end-to-end. This should be verified by the local networking team.

To check the current MTU values set on the vSwitch and VMkernel network interface:

  1. In the vSphere Client, right-click the host in the cluster and then click the Configuration tab.
  2. Click Networking.
  3. Click Properties for Management Network on vSwitch0.
  4. Under the Ports tab, click vSwitch
For any change on MTU, please refer to Solve

Affected Products

VxRail E660N

Products

VxRail Appliance Family
Article Properties
Article Number: 000192267
Article Type: Solution
Last Modified: 31 Jul 2024
Version:  3
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.