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Upgrading a single NSX Manager in a vCenter Linked Mode Environment (2127061)

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In an environment with multiple vCenter Servers with multiple NSX managers, you experience these symptoms:
  • When selecting one or more NSX Manager from the vSphere Web Client > Networking and Security > Installation > Host Preparation, you see this error:

    Could not establish communication with NSX Manager. Please contact administrator.


In an environment with multiple vCenters and multiple NSX Managers, it is possible to get a single-pane-of-glass view by using vCenter Linked Mode or registering both vCenter Servers with the same SSO server.

This issue occurs when the associated NSX Managers are running different versions of VMware NSX for vSphere 6.x or when NSX lookup service is not configured in the NSX environment.


This is a known issue affecting VMware NSX for vSphere 6.x.

Currently, there is no resolution.

To avoid this issue, ensure that all NSX Managers and other NSX components for all sites have been installed or upgraded to the same NSX version.

To work around this issue, create an additional vCenter Server (VC) user (an Active Directory user or vCenter Server local user with NSX privileges) for each VC-NSX pair in Linked Mode.
  1. Log in to the vCenter Server using the vSphere Web Client.
  2. Navigate to Administration > Single Sign On > Users and Groups > Users.
  3. Create the additional vCenter Server user for each VC-NSX pair in Linked Mode.


  • This workaround requires each NSX Manager in a multi-VC setup to register to its own unique VC, Web Client and can be part of same SSO server. Each user must only log in to their assigned VC-NSX pair so that same Web Client / NGC Plug-in is used for that user. Each user should not have permissions for both VC-NSX pairs.

    For example:


  • To use same the user ID on all NSX-VC pairs, you should have separate SSO server, vCenter Server, vSphere Web Client, NSX Manager for each VC-NSX pair in the Linked mode. For more information on Linked mode, see the Using Enhanced Linked Mode section of the ESXi and vCenter Server 6.0 Documentation.
  • In Cross-vCenter environment, you can temporarily upgrade all NSX managers first before bringing up all NSX components in the Cross-vCenter setup. For more information on Cross-vCenter, see the Cross-vCenter NSX Installation Guide.

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