add 400G ExpressRoute Direct connectivity details

Updated the ExpressRoute Direct documentation to reflect changes in connectivity options and circuit SKUs.

Author: raghavendermareddy

articles/expressroute/expressroute-erdirect-about.md

@@ -7,13 +7,13 @@ ms.service: azure-expressroute
 ms.custom:
   - ignite-2023
 ms.topic: concept-article
-ms.date: 07/08/2025
+ms.date: 03/02/2026
 ms.author: duau
 ---
 
 # About ExpressRoute Direct
 
-ExpressRoute Direct gives you the ability to connect directly into the Microsoft global network at peering locations strategically distributed around the world. ExpressRoute Direct provides dual 100-Gbps or 10-Gbps connectivity that supports active-active connectivity at scale. You can work with any service provider to set up ExpressRoute Direct.
+ExpressRoute Direct gives you the ability to connect directly into the Microsoft global network at peering locations strategically distributed around the world. ExpressRoute Direct provides dual 400-Gbps, 100-Gbps or 10-Gbps connectivity that supports active-active connectivity at scale. You can work with any service provider to set up ExpressRoute Direct.
 
 Key features include, but not limited to:
 
@@ -51,9 +51,9 @@ If you start using ExpressRoute Direct and find that ports at your selected peer
 
 | ExpressRoute using a service provider | ExpressRoute Direct | 
 | --- | --- |
-| Uses a service provider to enable fast onboarding and connectivity into existing infrastructure | Requires 100-Gbps or 10-Gbps infrastructure and full management of all layers. |
+| Uses a service provider to enable fast onboarding and connectivity into existing infrastructure | Requires 400-Gbps, 100-Gbps or 10-Gbps infrastructure and full management of all layers. |
 | Integrates with hundreds of providers including Ethernet and MPLS | Direct and Dedicated capacity for regulated industries and large data ingestion. |
-| Circuits SKUs ranging from 50 Mbps to 10 Gbps | You can select a combination of the following circuit SKUs on 100-Gbps ExpressRoute Direct: <ul><li>5 Gbps</li><li>10 Gbps</li><li>40 Gbps</li><li>100 Gbps</li></ul> You can select a combination of the following circuit SKUs on 10-Gbps ExpressRoute Direct:<ul><li>1 Gbps</li><li>2 Gbps</li><li>5 Gbps</li><li>10 Gbps</li></ul> |
+| Circuits SKUs ranging from 50 Mbps to 10 Gbps | You can select a combination of the following circuit SKUs on 10-Gbps ExpressRoute Direct:<ul><li>1 Gbps</li><li>2 Gbps</li><li>5 Gbps</li><li>10 Gbps</li></ul>You can select a combination of the following circuit SKUs on 100-Gbps ExpressRoute Direct: <ul><li>5 Gbps</li><li>10 Gbps</li><li>40 Gbps</li><li>100 Gbps</li></ul>You can select a combination of the following circuit SKUs on 400-Gbps ExpressRoute Direct: <ul><li>5 Gbps</li><li>10 Gbps</li><li>40 Gbps</li><li>100 Gbps</li><li>200 Gbps</li><li>400 Gbps</li></ul> |
 | Optimized for a single tenant | Optimized for single tenant with multiple business units and multiple work environments. |
 
 ## ExpressRoute Direct circuits
@@ -83,9 +83,9 @@ ExpressRoute Direct supports large data ingestion scenarios into services such a
 ## Technical Requirements
 
 * Microsoft Enterprise Edge Router (MSEE) Interfaces:
-    * Dual 10 Gigabit or 100-Gigabit Ethernet ports only across router pair
+    * Dual 10-Gigabit, 100-Gigabit or 400-Gigabit Ethernet ports only across router pair
     * Single Mode LR Fiber connectivity
-      * MSEE supports QSFP-100G-LR-4 for 100 Gbps (Use compatible optics on your devices) 
+      * MSEE supports QSFP-100G-LR-4 for 100-Gbps and QSFP-DD-400G-LR-4 for 400-Gbps (Use compatible optics on your devices) 
     * IPv4 and IPv6
     * IP MTU 1,500 bytes