Update for ExpressRoute Direct

Note that FastPath support for Vnet peering + UDRs is only available for ExpressRoute Direct connections.

Author: mialdrid

articles/expressroute/about-fastpath.md

@@ -34,12 +34,14 @@ To configure FastPath, the virtual network gateway must be either:
 
 ### Virtual network (Vnet) Peering
 FastPath will send traffic directly to any VM deployed in a virtual network peered to the one connected to ExpressRoute, bypassing the ExpressRoute virtual network gateway. This feature is available for both IPv4 and IPv6 connectivity.
+**FastPath support for vnet peering is only available for ExpressRoute Direct connections.
 
 > [!NOTE]
 > * FastPath Vnet peering connectivity is not supported for Azure Dedicated Host workloads.
 
 ## User Defined Routes (UDRs)
 FastPath will honor UDRs configured on the GatewaySubnet and send traffic directly to an Azure Firewall or third party NVA.
+**FastPath support for UDRs is only available for ExpressRoute Direct connections.
 
 > [!NOTE]
 > * FastPath UDR connectivity is not supported for Azure Dedicated Host workloads.