Few transport nodes and edge nodes remain in degraded state on NSX manager

Products

• VMware NSX

Issue/Introduction

• Few transport nodes and Edge nodes remain degraded state on NSX manager GUI

• While checking the tunnel status, the TEP tunnel between many transport nodes and one of the Edge node remained down

Environment

NSXT 4.x

Cause

The fp-eth0 interface on the edge node was down while checking the link state of the interface using command get interfaces or get interface fp-ethX on the Edge node

Resolution

To bring up the link state of the interface on the Edge VM, 

1. Login to vcenter and locate the Edge VM
2. Right click on the Edge VM and click Edit settings
3. Locate the Network adapter that is mapped with fp-ethX (check the MAC address assigned to the adapter match with interface fp-ethX)
4. Disconnect the adapter interface, save the config and then reconnect it. (interface flap)
5. Verify that the Connected and Connect at power on checkboxes are enabled.

Also check the admin/link state of  ESXi vmnic uplink is down, or the portgroup is misconfigured, it will also reflect as link down here.

To bring up the admin state of fp-eth0 interface, execute the command "set physical-port fp-eth0 state up"

Check the tunnel status between the transport nodes and Edge VMs are Up and also check "vmkping" between the tunnel endpoints (Refer KB 344313)