BGP Down alarm is not raised in NSX

Products

• VMware NSX

Issue/Introduction

• BGP in NSX environment is established over Virtual Tunnel Interface, for example VPN tunnel. 
• VPN tunnel is down.
• Following VPN state, BGP also goes down.
• NSX will only raise the alarm for the VPN tunnel.
• Alarm for BGP state is not raised by NSX Manager.
• In this situation, SNMP trap for BGP state also won't trigger.

Environment

VMware NSX

Cause

• NSX Manager's Routing Control Plane (RCPM) is designed to avoid raising any unnecessary alarms when VTI is down on any standby nodes.
• The alarms are suppressed on the active node, hence BGP alarms will be suppressed internally when VPN (which BGP is established over) goes down.

Resolution

This is a known issue impacting VMware NSX.