Enabling HA Loss of Signal (LOS) Detection on Routed Interfaces

Products

• VMware VeloCloud SD-WAN

Issue/Introduction

When an Edge is enabled with HA, the number of LAN and WAN Interfaces connected to the Edge are detected and this count is used to take decision on performing the HA failover. For ESXi edges, and in case of physical vNIC failure, HA failover fails.

Environment

Configuration is available from VCO GUI for all edges' models, but it is recommended to use more with virtual edges deployed on ESXi environment.

Cause

When Edges in HA mode are deployed on ESXi, the LAN and WAN vNICs of the Edge are uplinked through single or multiple physical NICs. If one of the physical NICs is down, the Interface count computed by HA will not be different from the Edge vNICs. The vSwitch connections remain intact, preventing the HA Failover.

Resolution

Enable HA LOS Detection from VCO GUI as per HA LoS Detection on Routed Interfaces