BGP session-diagnostics found to be disabled in NSX Edge 4.2.x.

Products

• VMware NSX

Issue/Introduction

• In VMware NSX version 4.2, the BGP session diagnostics setting is enabled by default. 
• However, when running the following command, you see the message "Session Diagnostics is disabled".

edge-fqdn(tier0_sr_vrf)> get bgp neighbor <neighbor-IP> session-diagnostics

• Also, BGP flaps do not automatically generate additional diagnostic data useful for root cause analysis and determining why it flapped. 
• The Tier 0 (T0) with the BGP configuration was created as a Manager object, not a Policy object. 

Environment

VMware NSX 4.2.x and later

Cause

• The BGP session diagnostics feature is specific to Policy objects and does not get enabled for NSX Manager objects.
• The Manager API is being deprecated and new features may not support it. See NSX Manager Overview for additional details. 

Resolution

Promote the T0 Manager Object to a Policy Object so that BGP session-diagnostics are enabled for the T0.