HCX RAV migration failure during switchover due to VM's NSX-T network not accessible

Products

• VMware HCX

Issue/Introduction

HCX RAV migration fails during switchover with the following error in UI



The source VM is running on NSX-T segment ( ie There is NSX-T on the source as well). The network name in the error is the network source VM is attached.

The app.log located at /common/logs/admin/ shows following errors

2024-12-15 22:17:13.041 UTC [VmotionService_SvcThread-99497, Ent: HybridityAdmin, , TxId: 7e02e3a6-cd6b-4c4a-9c83-e57207b17499] ERROR c.v.h.s.v.j.StartSourceSideRelocateVmWorkflow- [migId=4e339498-3cf5-4c02-####-8af3########] Source side relocate failed for the virtual machine. error is Currently connected network interface 'Network adapter 1' uses network '<VM network name> (nsx.LogicalSwitch:e03cf8fd-5d7b-442d-####-835e########)', which is not accessible.
com.vmware.vim.binding.vim.fault.CannotAccessNetwork: Currently connected network interface 'Network adapter 1' uses network '<VM network name> (nsx.LogicalSwitch:e03cf8fd-5d7b-442d-####-835e########)', which is not accessible.

 

Environment

VMware HCX

Cause

The failure is due to the VM's NSX-T segment not accessible by HCX due to missing NSX-T registration with HCX

Resolution

Please check HCX admin page ie <https://<hcx-ip>:9443> and ensure that NSX-T shows the status as connected & green. 
If NSX-T is successfully connected resyncing the service mesh and disabling/reenabling RAV in the service mesh can correct the issue.