Intermittent BGP connection drops with errors in NSX for vSphere environment

Products

• VMware NSX Networking

Issue/Introduction

Symptoms:

• Intermittent BGP connection drops for less than a minute.
• In the /var/log/messages file of the NSX edge VM, you see entries similar to:

[user.emerg] EXCEPTION 0x4102-71 (0000): A NOTIFICATION message is being sent to a neighbor due to an unexpected

[user.info] AUDIT 0x4102-49 (0000): A connection's FSM state has deteriorated.

[user.info] AUDIT 0x4102-48 (0001): A connection has entered or left Established state.

• In the hostd.log file of the ESXi host , you see entries similar to:
  SNAPSHOT: SnapshotDelete task for the effected edge
  
  Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.

Environment

VMware NSX for vSphere 6.0.x
VMware NSX for vSphere 6.1.x
VMware NSX for vSphere 6.2.x

Cause

This issue occurs due to a NSX edge snapshot or scheduled backup run by a third-party that leverages quiesced snapshots.

Resolution

Note: VMware does not support backing up the NSX Manager or NSX Edge with VMware Snapshot quiescing technology for NSX for vSphere.

 

To work around this issue,

• Delete any existing snapshots on the NSX Edge.
• Disable any scheduled edge backups which use snapshot technology.

For more information on taking a backup of the NSX Manager, see the Back Up NSX Manager Data section in the NSX Administration Guide