Merge pull request #191782 from duongau/bfdnote

ExpressRoute BFD - Add note about failover time

Author: PRMerger5

articles/expressroute/expressroute-bfd.md

@@ -27,6 +27,9 @@ You can control the BGP timers by configuring a lower BGP keep-alive and hold-ti
 
 In this scenario, BFD can help. BFD provides low-overhead link failure detection in a subsecond time interval. 
 
+> [!NOTE]
+> BFD provides faster failover time when a link failure is detected, but the overall connection convergence will take up to a minute for failover between ExpressRoute virtual network gateways and MSEEs. 
+>
 
 ## Enabling BFD
 
@@ -78,4 +81,4 @@ For more information or help, check out the following links:
 <!--Link References-->
 [CreateCircuit]: ./expressroute-howto-circuit-portal-resource-manager.md
 [CreatePeering]: ./expressroute-howto-routing-portal-resource-manager.md
-[ResetPeering]: ./expressroute-howto-reset-peering.md
+[ResetPeering]: ./expressroute-howto-reset-peering.md