P
ORT
C
ONFIGURATION
3-113Configuring Port Mirroring
You can mirror traffic from any source
port to a target port for real-time
analysis. You can then attach a logic
analyzer or RMON probe to the target
port and study the traffic crossing the
source port in a completely unobtrusive
manner.
Command Usage
Monitor port speed should match or exceed source port speed,
otherwise traffic may be dropped from the monitor port.
All mirror sessions have to share the same destination port.
When mirroring port traffic, the target port must be included in the
same VLAN as the source port.
Command Attributes
Mirror Sessions – Displays a list of current mirror sessions.
Source Port – The port whose traffic will be monitored.
Type – Allows you to select which traffic to mirror to the target port,
Rx (receive), Tx (transmit), or Both.
Target Port – The port that will “duplicate” or “mirror” the traffic on
the source port.
Web – Click Port, Mirror. Specify the source port, the traffic type to be
mirrored, and the monitor port, then click Add.
Source
port(s)
Single
target
port