NSX Edge BGP flapping intermittently

Products

• VMware NSX

Issue/Introduction

Alarms are seen in the NSX Manager reporting the BGP has flapped, but the issue is self resolved.

The flaps happen at irregular intervals with no apparent cause.

The flaps are isolated to a single Edge node and BGP neighbor, and other nodes with the same BGP neighbor have no issues.

The issue occurs when the Edge node is on different ESXi hosts, ruling out an underlying ESXi issue.

In the /var/log/syslog file of the impacted Edge node you see logs like the following:

YYYY-MM-DDTHH:MM:SS.sssZ edge NSX ##### - [nsx@#### comp="nsx-edge" s2comp="nsx-monitoring" entId="########-####-####-####-############" tid="10525" level="ERROR" eventState="On" eventFeatureName="routing" eventSev="error" eventType="bgp_down"] In Router ########-####-####-####-############, BGP neighbor ########-####-####-####-############ (###.###.###.###) is down. Reason: Edge is not ready.

Environment

VMware NSX

Resolution

Reboot the NSX Edge node that reports the flapping in a maintenance window.

Additional Information

If the flapping continues, please open a support case with Broadcom about this issue and provide the following:

• NSX Edge log bundles for all Edges in the Edge Cluster
• Ensure log date range covers the full date of the event(s) being investigated. When in doubt, retrieve logs for all time.
• NSX Manager log bundles
• ESXi host log bundles for all hosts supporting affected Edge VMs
• Text of any error messages seen in NSX GUI or command lines pertinent to the investigation

Please see Creating and managing Broadcom support cases for assistance in creating a support case.