Dell PowerConnect FCS624S Configuration Guide - Page 675

Chapter Configuring Port Mirroring and Monitoring 20 Table 112 lists the individual Dell PowerConnect switches and the mirroring features they support. TABLE 112 Supported port mirroring and monitoring features Feature PowerConnect B-Series FCX Port mirroring and monitoring (mirroring Yes of both inbound and outbound traffic on individual ports) ACL-based mirroring of denied traffic Yes ACL-based mirroring of permitted traffic Yes MAC address filter-based mirroring Yes VLAN-based mirroring Yes The procedures in this chapter describe how to configure port mirroring on Dell PowerConnect devices. Overview Port mirroring is a method of monitoring network traffic that forwards a copy of each incoming or outgoing packet from one port on a network switch to another port where the packet can be analyzed. Port mirroring may be used as a diagnostic tool or debugging feature, especially for preventing attacks. Port mirroring can be managed locally or remotely. Configure port mirroring by assigning a port from which to copy all packets, and a "mirror" port where the copies of the packets are sent (also known as the monitor port). A packet received on, or issued from, the first port is forwarded to the second port as well. Attach a protocol analyzer on the mirror port to monitor each segment separately. The analyzer captures and evaluates the data without affecting the client on the original port. The mirror port may be a port on the same switch with an attached RMON probe, a port on a different switch in the same hub, or the switch processor. Configuring port mirroring and monitoring To configure port monitoring, first specify the mirror port, then enable monitoring on the monitored port. The mirror port is the port to which the monitored traffic is copied. Attach your protocol analyzer to the mirror port.The monitored port is the port whose traffic you want to monitor. PowerConnect B-Series FCX Configuration Guide 633 53-1002266-01