Packet loss alerts for the Network Extension Appliance in HCX UI

Products

• VMware HCX

Issue/Introduction

• HCX Transport Analytics graph shows packet loss for the VMware HCX Network Extension (NE) appliance.
  
  
  
  
  
  
• NE appliance may also show alarm 'HCX Interconnect Service Mesh NE appliance Tunnel State Change' changed from Green to Red.
  
  

Environment

VMware HCX

Cause

Any packet loss exceeding 0.1% on the tunnel path triggers HCX uplink loss rate alerts. This threshold is part of the minimum network underlay requirements for HCX installations.

Refer to techdocs for requirements - Network Underlay Minimum Requirements

 

Resolution

Determine Root Cause of WAN Uplink Packet Loss

To resolve these alerts, identify and mitigate the source of loss in the physical or virtual network underlay:

1. Review Transport Analytics: Monitor the HCX Service Mesh to identify real-time performance metrics of the transport tunnel.

2. Verify Underlay Requirements: Ensure the network path meets the minimum requirement of less than 0.1% loss.

3. Engage Network Team: Investigate the Wide Area Network (WAN) path for intermittent congestion or hardware errors that do not appear in local appliance logs.

Additional Information

Troubleshooting HCX Interconnect and Network Extension Issues Due to VLAN Network Loops

HCX Network Underlay Minimum Requirements

Understanding HCX Transport Analytics