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+SPAN port mirroring can copy the inbound/outbound traffic of the interface to
+the specified interface, usually the interface can be connected to some special
+equipment, such as behavior control system, intrusion detection system and
+traffic collector, and can copy all related traffic from this port
+
+VyOS uses the `mirror` option to configure port mirroring. The configuration
+is divided into 2 different directions. Destination ports should be configured
+for different traffic directions.
+
+.. cfgcmd:: set interfaces {{ var0 }} <interface> mirror
+   ingress <monitor-interface>
+
+   Configure port mirroring for `interface` inbound traffic and copy the
+   traffic to `monitor-interface`
+   
+   Example: Mirror the inbound traffic of `{{ var1 }}` port to `{{ var2 }}`
+   
+   .. code-block:: none
+   
+     set interfaces {{ var0 }} {{ var1 }} mirror ingress {{ var2 }} 
+
+.. cfgcmd:: set interfaces {{ var0 }} <interface> mirror egress
+   <monitor-interface>
+
+   Configure port mirroring for `interface` outbound traffic and copy the
+   traffic to `monitor-interface`
+   
+   Example: Mirror the outbound traffic of `{{ var1 }}` port to `{{ var2 }}`
+   
+   .. code-block:: none
+   
+     set interfaces {{ var0 }} {{ var1 }} mirror egress {{ var2 }} 
+
+