Azure ExpressRoute resilience, maintenance and the importance of active/active links

Links: https://docs.microsoft.com/en-us/azure/expressroute/maintenance-alerts https://docs.microsoft.com/en-us/azure/expressroute/expressroute-faqs#i-received-a-notification-about-maintenance-on-my-expressroute-circuit-what-is-the-technical-impact-of-this-maintenance https://docs.microsoft.com/en-us/azure/expressroute/designing-for-disaster-recovery-with-expressroute-privatepeering#large-distributed-enterprise-network Topics: 00:00 Introduction 00:29 ExpressRoute maintenance and notifications 01:12 ExpressRoute multi-pop/circuit resilience, common terminology misconceptions 03:22 Single ExpressRoute circuit primary/secondary path resilience 03:50 Maintenance window connection draining via BGP AS-path-prepend 06:12 BGP Local Preference caution and recommendation run single ER Circuit active/active 09:19 Circuit bursting 09:49 Reminder related to Availability Zone aware ExpressRoute Virtual Network Gateways