Connecting each ExpressRoute Gateway to a minimum of two circuits in different peering locations enhances redundancy and reliability by ensuring alternate pathways for data in case one circuit fails.
Microsoft or the ExpressRoute provider always ensures physical redundancy in their services. It's essential to maintain this level of physical redundancy (two devices, two links) from the ExpressRoute peering location to your network for optimal performance and reliability.
Operating both connections of an ExpressRoute circuit in active-active mode enhances high availability as the Microsoft network will load balance the traffic across the connections on a per-flow basis.
Enabling BFD over ExpressRoute speeds up link failure detection between MSEE devices and routers configured for ExpressRoute (CE/PE), applicable over both customer and Partner Edge routing devices with managed Layer 3 service.
Click the Azure Resource Graph tab to view the query
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Configure monitoring and alerting for ExpressRoute circuits
Impact:HighCategory:Monitoring and AlertingPG Verified:Verified
APRL GUID:9771a435-d031-814e-9827-9b5fdafc0f87
Description:
Use Network Insights for monitoring ExpressRoute circuit availability, QoS, and throughput. Set alerts based on Azure Monitor Baseline Alerts for availability, QoS metrics, and throughput metrics exceeding specific thresholds.
Click the Azure Resource Graph tab to view the query
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Configure service health to receive ExpressRoute circuit maintenance notification
Impact:HighCategory:Monitoring and AlertingPG Verified:Verified
APRL GUID:26cb547f-aabc-dc40-be02-d0a9b6b04b1a
Description:
ExpressRoute leverages service health for notifications on both planned and unplanned maintenance, ensuring users are informed about any changes to their ExpressRoute circuits.
Rate limiting controls traffic volume between on-premises networks and Azure via ExpressRoute Direct, applying to private or Microsoft peering. It distributes port bandwidth, ensures stability, and prevents congestion, with steps outlined for enabling on circuits.