diff --git a/doc/Configuration.md b/doc/Configuration.md
index 26a67da0c0..8476f2028b 100644
--- a/doc/Configuration.md
+++ b/doc/Configuration.md
@@ -27,6 +27,7 @@ Table of Contents
          * [Management Interface](#management-interface)  
          * [Management port](#management-port)  
          * [Management VRF](#management-vrf)  
+         * [Mirroring](#mirroring)  
          * [MAP_PFC_PRIORITY_TO_QUEUE](#map_pfc_priority_to_queue)  
          * [NTP and SYSLOG servers](#ntp-and-syslog-servers)  
          * [Port](#port)   
@@ -791,6 +792,46 @@ instead of data network.
 }
 ```
 
+
+### Mirroring
+
+```
+{
+"MIRROR_SESSION_TABLE:session_1": {
+    "src_ip": "1.1.1.1",
+    "dst_ip": "2.2.2.2",
+    "gre_type": "0x6558",
+    "dscp": "50",
+    "ttl": "64",
+    "queue": "0"
+  }
+}
+
+{
+"MIRROR_SESSION_TABLE:session_2": {
+    "src_ip": "1.1.1.1",
+    "dst_ip": "2.2.2.2",
+    "gre_type": "0x6558",
+    "dscp": "50",
+    "ttl": "64",
+    "queue": "0",
+    "src_port": "Ethernet0,PortChannel001",
+    "direction": "BOTH",
+    "type": "ERSPAN"
+  }
+}
+
+{
+"MIRROR_SESSION_TABLE:session_3": {
+     "type": "SPAN"
+     "dst_port": "Ethernet0"
+     "src_port": "Ethernet4,PortChannel002"
+     "direction": "BOTH"
+  }
+}
+
+```
+
 ### MAP_PFC_PRIORITY_TO_QUEUE
 
 ```
@@ -1162,4 +1203,4 @@ Incremental Configuration by Subscribing to ConfigDB
 
 Detail instruction to be added. A sample could be found in this
 [PR](https://github.com/Azure/sonic-buildimage/pull/861) that
-implemented dynamic configuration for BGP.
\ No newline at end of file
+implemented dynamic configuration for BGP.