Brocade TurboIron 24X Series Configuration Guide - Manual (Page 457)

Brocade TurboIron 24X Series Configuration Guide 423
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Chapter
19
Configuring Port Mirroring and Monitoring
In this chapter
• Mirroring support by platform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
• Configuring port mirroring and monitoring . . . . . . . . . . . . . . . . . . . . . . . . . 423
• ACL-based inbound mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426
• MAC filter-based mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430
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 68 lists which devices support the mirroring features discussed in this chapter.
Configuring port mirroring and monitoring
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.
TABLE 68 Mirroring support
Mirroring Feature TurboIron X Series
Basic Port Mirroring and Monitoring X
ACL-Based Inbound Mirroring X
MAC Filter-Based Mirroring X