Edge Bridge L2 Loop Detection Alarm

Products

• VMware NSX

Issue/Introduction

Title: Edge Bridge L2 Loop Detection Alarm
Event ID: edge_health.bridge_port_loop_detected

Alarm Description

• Purpose: The alarm is raised because a loop event is detected and the Edge Bridge learns the same VNI MAC address via bridged VLAN. If the MAC flap is a single-time event the alarm will be cleared.
• Impact: Traffic degradation due to the loop. The traffic to the flapping MAC will be impacted.

Environment

VMware NSX

Cause

 

 

Resolution

Steps to Resolve

For 4.2.0 and higher

 

Recommended Action:

• If the MAC move is caused by edge HA failover, it is one-time event and expected. 
• If the MAC move is observed by Bare Metal Edge, then the loop could be formed on two links in the TOR (BME example)
• If the MAC move is observed by VM Edge, then the loop could be on ESX host, it is outside of Edge VM.

Maintenance window required for remediation? No

Additional Information

Configure an Edge VM for Bridging.