IBGP peer is missing

Products

• VMware Smart Assurance
• Network Observability

Issue/Introduction

Users may observe that an Internal BGP (iBGP) peer is reported as missing, or they may wish to change how SessionDisconnected events are correlated in relation to the IsIBGPPeerMissing attribute.

Environment

All supported Smarts releases

Cause

The IsIBGPPeerMissing attribute is a computed boolean used to identify when a peer system is missing within the SMARTS correlation logic. It is defined by the following condition:

IsIBGPPeerMissing = (IsSessionDisconnected && !IsBGPPeerAdminDown && !IsEBGP && (|PeerSystem| == 0))

This logic triggers when:

• The session is disconnected (IsSessionDisconnected is true).
• The BGP peer is not administratively down (!IsBGPPeerAdminDown).
• The peer is not an External BGP peer (!IsEBGP).
• The peer system cannot be found or identified (|PeerSystem| == 0). SMARTS IBGP peer is missing

Resolution

• The correlation logic for SMARTS BGP monitoring is hardcoded into the product's underlying model.
• Internal product confirmation has verified that the behavior regarding how SessionDisconnected events serve as parents or how they are correlated within this logic is not changeable.
• If you require further clarification on how a specific remote address is computed, ensure you are verifying the PeerSystem relationship in your topology. If the |PeerSystem| count is 0, SMARTS correctly identifies the peer as missing per the standard product logic.