AVD added list of gateway region codes

Author: dknappettmsft

articles/virtual-desktop/insights-glossary.md

@@ -68,6 +68,59 @@ When an error or alert appears in Azure Virtual Desktop Insights, it's categoriz
 
 Each diagnostics issue or error includes a message that explains what went wrong. To learn more about troubleshooting errors, see [Identify and diagnose Azure Virtual Desktop issues](./troubleshoot-set-up-overview.md).
 
+## Gateway region codes
+
+Some metrics in Azure Virtual Desktop Insights list the gateway region a user connects through. The gateway region is represented by a three or four-letter code that corresponds to the Azure region where the gateway is located. The following table lists the gateway region codes and their corresponding Azure regions:
+
+| Gateway region code | Azure region |
+|--|--|
+| AUC | Australia Central |
+| AUC2 | Australia Central 2 |
+| AUE | Australia East |
+| AUSE | Australia Southeast |
+| BRS | Brazil South |
+| CAC | Canada Central |
+| CAE | Canada East |
+| CHNO | Switzerland North |
+| CIN | Central India |
+| CUS | Central US |
+| EAS | East Asia |
+| EEU | East Europe |
+| EUS | East US |
+| EUS2 | East US 2 |
+| FRAS | France South |
+| FRC | France Central |
+| GEC | Germany Central |
+| GEN | Germany North |
+| GENE | Germany Northeast |
+| GWC | Germany West Central |
+| JPE | Japan East |
+| JPW | Japan West |
+| KRC | Korea Central |
+| KRS | Korea South |
+| KRS2 | Korea South 2 |
+| NCUS | North Central US |
+| NEU | North Europe |
+| NOE | Norway East |
+| NOW | Norway West |
+| SAN | South Africa North |
+| SAW | South Africa West |
+| SCUS | South Central US |
+| SEA2 | Southeast Asia 2 |
+| SEAS | Southeast Asia |
+| SIN | South India |
+| SWW | Switzerland West |
+| UAEC | UAE Central |
+| UAEN | UAE North |
+| UKN | UK North |
+| UKS | UK South |
+| UKS2 | UK South 2 |
+| UKW | UK West |
+| WCUS | West Central US |
+| WEU | West Europe |
+| WIN | West India |
+| WUS | West US |
+
 ## Input delay
 
 "Input delay" in Azure Virtual Desktop Insights means the input delay per process performance counter for each session. In the host performance page at [aka.ms/azmonwvdi](https://portal.azure.com/#blade/Microsoft_Azure_WVD/WvdManagerMenuBlade/workbooks), this performance counter is configured to send a report to the service once every 30 seconds. These 30-second intervals are called "samples," and the report the worst case in that window. The median and p95 values reflect the median and 95th percentile across all samples.

articles/virtual-desktop/insights-use-cases.md

@@ -32,8 +32,11 @@ To view round-trip time:
 1. From the drop-down lists, select one or more **subscriptions**, **resource groups**, **host pools**, and specify a **time range**, then select the **Connection Performance** tab.
 
 1. Review the section for **Round-trip time** and focus on the table for **RTT by gateway region** and the graph **RTT median and 95th percentile for all regions**. In the example below, most median latencies are under the ideal threshold of 100 ms, but several are higher. In many cases, the 95th percentile (p95) is substantially higher than the median, meaning that there are some users experiencing periods of higher latency.
-   
+
    :::image type="content" source="media/insights-use-cases/insights-connection-performance-latency-1.png" alt-text="A screenshot of a table and graph showing the round-trip time." lightbox="media/insights-use-cases/insights-connection-performance-latency-1.png":::
+
+   > [!TIP]
+   > You can find a list of the gateway region codes and their corresponding Azure region at [Gateway region codes](insights-glossary.md#gateway-region-codes).
    
 1. For the table **RTT by gateway region**, select **Median**, until the arrow next to it points down, to sort by the median latency in descending order. This order highlights gateways your users are reaching with the highest latency that could be having the most impact. Select a gateway to view the graph of its RTT median and 95th percentile, and filter the list of 20 top users by RTT median to the specific region.