diff --git a/content/en/docs/reference/config/metrics/index.md b/content/en/docs/reference/config/metrics/index.md
index 01b5bdd7c0..b6d9a111ad 100644
--- a/content/en/docs/reference/config/metrics/index.md
+++ b/content/en/docs/reference/config/metrics/index.md
@@ -9,10 +9,8 @@ aliases:
 ---
 
 The following are the standard service level metrics exported by Istio.
-Istio standard metrics are directly exported by the Envoy proxy since Istio 1.5.
-The telemetry component is [implemented](https://github.com/istio/proxy/tree/master/extensions/stats) as a [Proxy-wasm](https://github.com/proxy-wasm/spec) plugin.
 
-In prior Istio releases Mixer produced these metrics.
+The telemetry component is [implemented](https://github.com/istio/proxy/tree/master/extensions/stats) as a [Proxy-wasm](https://github.com/proxy-wasm/spec) plugin.
 
 ## Metrics
 
@@ -113,3 +111,9 @@ For TCP traffic, Istio generates the following metrics:
     destination_canonical_service
     destination_canonical_revision
     {{< /text >}}
+
+*   **Destination Cluster**: This identifies the cluster of the destination workload.
+    This is set by: `global.multiCluster.clusterName` at cluster install time.
+
+*   **Source Cluster**: This identifies the cluster of the source workload.
+    This is set by: `global.multiCluster.clusterName` at cluster install time.
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