VxRail: Enabling vLCM Fails When Using External vCenter 8.0 U3

Summary: Changes in how vCenter 8.0 U3 handles HTTP requests result in failure when enabling vLCM.

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Symptoms

It is supported that the external vCenter (customer managed vCenter) version is higher than the VxRail cluster ESXi host version.
However, when the external vCenter 8.0 U3 is managing some previous version VxRail hosts, enabling vLCM on the cluster fails.

Scenario 1: Day1 cluster deployment enable vLCM fails.
Screenshot of deployment failure 

Scenario 2: Day2 enable vLCM stuck at 12%.
Screenshot of failure when enabling vLCM 

Cause

vCenter 8.0 U3 starts to support gzip format compression header for HTTP Request, it is not compatible with previous versions of VxRail manager, which causes communication issue between the vCenter and VxRail manager.

Resolution

7.0.520 and 8.0.300 releases have fixed this issue.

  • For the day1 scenario, reimage the nodes to 7.0.520 or 8.0.300, then build the cluster with vLCM enabled.
  • For the day2 scenario, upgrade the cluster to 7.0.520 or 8.0.300, then enable the vLCM.



If you are not ready for an upgrade, please engage Dell Support to apply a patch on the VxRail manager.

Affected Products

VxRail, VxRail Appliance Series, VxRail Software
Article Properties
Article Number: 000225089
Article Type: Solution
Last Modified: 26 Nov 2025
Version:  4
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