enable mirror to port

enable mirror to [port port | port-list port_list loopback-port port] {remote-tag tag}


Dedicates a port on the switch to be the mirror output port, or the monitor port.

Syntax Description

port Specifies the mirror output port.
port_list Specifies the list of ports where traffic is to be mirrored.
loopback-port Specifies an otherwise unused port required when mirroring to a port_list. The loopback-port is not available for switching user data traffic.
port Specifies a single loopback port that is used internally to provide this feature.
remote-tag Specifies the value of the VLAN ID used by the mirrored packets when egressing the monitor port.



Usage Guidelines

Port mirroring configures the switch to copy all traffic associated with one or more ports, VLANS or virtual ports. A virtual port is a combination of a VLAN and a port. The monitor port(s) can be connected to a network analyzer or RMON probe for packet analysis. The switch uses a traffic filter that copies a group of traffic to the monitor port.

Up to 16 mirroring filters and up to four monitor ports can be configured on the switch. After a port has been specified as a monitor port, it cannot be used for any other function. Frames that contain errors are not mirrored.

You cannot run ELSM and mirroring on the same port. If you attempt to enable mirroring on a port that is already enabled for ELSM, the switch returns a message similar to the following:

Error: Port mirroring cannot be enabled on an ELSM enabled port.

Standalone Switches and SummitStacks

The traffic filter can be defined based on one of the following criteria:

SummitStack Only

The traffic filter can be defined based on one of the following criteria:


The following example selects port 4 as the mirror, or monitor, port:

# enable mirror to port 4


This command was added in ExtremeXOS 15.3.

Platform Availability

This command is available on ExtremeSwitching 5320, 5420, 5520, and 5720 series switches.