kezhenxu94 commented on a change in pull request #6727:
URL: https://github.com/apache/skywalking/pull/6727#discussion_r627386110



##########
File path: docs/en/setup/envoy/als_setting.md
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@@ -29,8 +29,9 @@ On Istio version 1.6.0+, if Istio is installed with [`demo` 
profile](https://ist
     
 - Activate SkyWalking [Envoy Receiver](../backend/backend-receivers.md). This 
is activated by default. 
 
-- Choose an ALS analyzer. There are two available analyzers, `k8s-mesh` and 
`mx-mesh`.
-  Set the system environment variable **SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS** 
such as `SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS=k8s-mesh`
+- Choose an ALS analyzer. There are two available analyzers, `k8s-mesh` and 
`mx-mesh` for both HTTP access logs and TCP access logs.
+  Set the system environment variable **SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS** 
and **SW_ENVOY_METRIC_ALS_TCP_ANALYSIS**
+  such as `SW_ENVOY_METRIC_ALS_HTTP_ANALYSIS=k8s-mesh`, 
`SW_ENVOY_METRIC_ALS_TCP_ANALYSIS=k8s-mesh`

Review comment:
       > So, TCP traffic is not working on VM. Correct?
   
   I think it should work on VM, from the code implementation I don’t see any 
difference between VM and Kubernetes pods in terms of TCP traffic




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