Answer: Local Preference

To set up active/standby BGP sessions with Cloud Routers, the on-premises router must influence its outbound path selection. The BGP attribute **Local Preference** is used within an AS to prefer specific routes. By assigning a higher Local Preference to routes from the primary Cloud Router, the on-premises router will prioritize that path. If the primary fails, the lower Local Preference route (standby) will take over. MED (D) is set by the advertising AS (e.g., Google) to influence inbound traffic, not controlled by the on-premises router. AS-Path (A) and Community (B) do not directly control active/standby behavior in this context.

Author: LeetQuiz Editorial Team