Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 395
53-1002269-02
Chapter
14
Configuring Port Mirroring and Monitoring
Mirroring support by platform
The procedures in this chapter describe how to configure port mirroring on devices.
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.
Table 56 lists which devices support the mirroring features discussed in this chapter.
Configuring port mirroring and monitoring
PowerConnect B-Series TI24X devices support one mirror port per device. 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.
Configuration notes
Refer to the following rules when configuring port mirroring and monitoring:
• Port monitoring and sFlow support:
• PowerConnect B-Series TI24X devices support sFlow and port monitoring together on the
same port.
TABLE 56 Mirroring support fo PowerConnect B-Series TI24X devices
Mirroring Feature
PowerConnect B-Series TI24X
Series
Basic Port Mirroring and Monitoring X
ACL-Based Inbound Mirroring X
MAC Filter-Based Mirroring X