1-3Table 1-1 describes how the ports on various switches are involved in the mirroringoperation.Table 1-1 Ports involved in the mirroring operationSwitch Ports involved FunctionSource portPort monitored. It copies packets to the reflectorport through local port mirroring. There can bemore than one source port.Reflector portReceives packets from the source port andbroadcasts the packets in the remote-probeVLAN.Source switchTrunk port Sends mirrored packets to the intermediateswitch or the destination switch.Intermediateswitch Trunk portSends mirrored packets to the destinationswitch.Two trunk ports are necessary for theintermediate switch to connect the devices at thesource switch side and the destination switchside.Trunk port Receives remote mirrored packets.Destinationswitch Destination portReceives packets forwarded from the trunk portand transmits the packets to the data detectiondevice.z Do not configure a default VLAN, a management VLAN, or a dynamic VLAN as theremote-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 switchover the remote-probe VLAN.z Do not configure a Layer 3 interface for the remote-probe VLAN, run other protocolpackets, or carry other service packets on the remote-prove VLAN and do not use theremote-prove VLAN as the voice VLAN and protocol VLAN; otherwise, remote portmirroring may be affected.Traffic MirroringTraffic 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 ismonitored, traffic mirroring provides a finer monitoring granularity. For detailedconfiguration about traffic mirroring, refer to QoS-QoS Profile Operation.
