This section describes how to enable high availability on VCE. Overview of VeloCloud Edge HAThe VeloCloud Edge (VCE) is the VeloCloud SD-WAN data plane component that is deployed at an end user’s branch location. VCEs configured in High Availability (HA) mode are mirror images of each other and they show up on the VeloCloud Orchestrator (VCO) as a single VCE. PrerequisitesThis section describes HA requirements that must be met before configuring a VCE as a Standby. High Availability OptionsEdges can be installed as a single standalone device or paired with another Edge to provide High Availability (HA) support. However, the HA configuration is only for wired WAN connections. Split-Brain Detection and PreventionThe "Split-Brain Condition section and the Split-Brain Detection and Prevention" section is new for the 3.3.0 release. Failure ScenariosThis section describes the following scenarios that can trigger a failover from an Active to a Standby Edge. Support for BGP Over HA LinkIn case the Edges switch to the enhanced HA option, the Active VCE will exchange BGP routes over the HA link. BGP on the Active Edge can now establish neighborship with a peer connected only to the standby Edge’s WAN link. Selection Criteria to Determine Active and Standby StatusThis section describes the selection criteria used to determine Active and Standby Status. VLAN-tagged Traffic Over HA LinkThis section describes the VLAN-tagged Traffic over an HA Link. Configure HAFor HA enhancements, there are no changes to the UI of the VCO. HA Event DetailsThis section describes HA events.