Unable to vMotion VMs due to error: "Currently connected network interface - lcp.ccpSession down" which is not accessible

Products

• VMware NSX

Issue/Introduction

• We cannot vMotion workloads to specific hosts with the lcp-ccp session down.
  
  
• vMotion to specific hosts fails with below error:
  
  "Currently connected network interface" "Network Adapter 1" uses network 'DVSwitch[50 29 dd 1a c9 58 df 20-a6 c1 XX XX XX XX XX XX} NSX Port Group {dvportgroup-2003}(lcp.ccpSession down)'. Which is not accessible
  
  NOTE: DVS switch UUID and dvportgroup-ID will be different.
  
  
• The below command will show lcp-ccp session as down on the host where vMotion is failing.
  
  [root@esxi-host:~] net-dvs -l | grep -i down
                  com.vmware.common.opaqueDvs.status.component.lcp.ccpSession = down , propType = RUNTIME
  
  
• In /var/run/log/nsx-syslog.log the following entries are seen:  
  
  2025-03-24T09:12:00.287Z Wa(180) nsx-proxy[2827682]: NSX 2827682 - [nsx@6876 comp="nsx-esx" subcomp="nsx-proxy" s2comp="nsx-rpc" tid="2827699" level="WARNING"] RpcConnection[3599 Connecting to ssl://#.#.#.19:1235 0] Couldn't connect to ssl://#.#.#.19:1235 (error: 110-Connection timed out)

         The above log indicates Host Transport Node is not able to connect to Control Plane (CCP).

• 'get controllers' command shows Transport Node to Controller connectivity as disconnected.
  

  [root@esxi-host:~] nsxcli -c get controllers

   Controller IP    Port     SSL         Status       Is Physical Master   Session State  Controller FQDN           Failure Reason

    #.#.#.18     1235   enabled      not used            false              null              NA                       NA
  #.#.#.17     1235   enabled      not used            false              null              NA                       NA
  #.#.#.19     1235   enabled    disconnected           true              down              NA              CONNECTION_TIMED_OUT

 

Environment

VMware NSX 

Cause

NSX Controller is needed during vMotion to provide the destination host with overlay network and new switchport for the VM.

Resolution

NSX manager uses port 1235 for communication between the Central Control Plane (CCP) and transport node.

Please ensure Controller connectivity to the Host Transport Node is up.

Check the connectivity between Host Transport node and Control Plane (CCP) using the below command.

[root@esxi-host:~] nsxcli -c get controllers
   
During the time when Controller connectivity to the Host Transport Node is down, no new configuration can be pushed down to the Transport node from the Control plane and features like vMotion will not be available.