Express route support to active / standby

Question

Hi There

I understand that one Expressroute consist of two physical circuit.
Then, for case of private peering, two eBGP sessions are configured on this Expressroute, with one VLAN and / 30 two subnets assigned.

In this case, are there any BGP attributes that can be used to implement Active / Standby for traffic from vNet to on-premises ?

I know that it is usually controlled by ECMP.

Thanks

Answer 1

This is discussed here in the High Availability with ExpressRoute Doc. Using Routes and BGP As Path prepending is the typical way to do this.