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Switch Ports involved Function
Intermediate
switch
Trunk port
Sends mirrored packets to the destination switch.
Two trunk ports are necessary for the intermediate
switch to connect the devices at the source switch
side and the destination switch side.
Trunk port
Receives remote mirrored packets.
Destination switch
Destination port
Receives packets forwarded from the trunk port and
transmits the packets to the data detection device.
z Do not configure a default VLAN, a management VLAN, or a dynamic VLAN as the remote-probe
VLAN.
z Configure all ports connecting the devices in the remote-probe VLAN as trunk ports, and ensure
the Layer 2 connectivity from the source switch to the destination switch over the remote-probe
VLAN.
z Do not configure a Layer 3 interface for the remote-probe VLAN, run other protocol packets, or
carry other service packets on the remote-prove VLAN and do not use the remote-prove VLAN as
the voice VLAN and protocol VLAN; otherwise, remote port mirroring may be affected.
Traffic Mirroring
Traffic mirroring uses ACL to monitor traffic that matches certain criteria on a specific port. Unlike port
mirroring where all inbound/outbound traffic passing through a port is monitored, traffic mirroring
provides a finer monitoring granularity. For detailed configuration about traffic mirroring, refer to
QoS-QoS Profile Operation.
Mirroring Configuration
Complete the following tasks to configure mirroring:
Task Remarks
Configuring Local Port Mirroring Optional
Configuring Remote Port Mirroring Optional
On a Switch 4500, only one destination port for local port mirroring and only one reflector port can be
configured, and the two types of ports cannot both exist.