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 }}