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DGS-3700 Series Layer 2 Managed Gigabit Ethernet Switch CLI Reference Guide
P
M
ORT
IRRORING
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The port mirroring commands in the Command Line Interface (CLI) are listed (along with the appropriate
parameters) in the following table.
C
OMMAND
config mirror port
enable mirror
disable mirror
show mirror
Each command is listed, in detail, in the following sections.
config mirror port
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To add the mirroring ports:
C
OMMANDS
P
ARAMETERS
<port> {[add | delete] source ports <portlist> [rx | tx | both]}
Used to configure a mirror port − source port pair on the Switch. Traffic from any
source port to a target port can be mirrored for real-time analysis. A logic analyzer
or an RMON probe can then be attached to study the traffic crossing the source
port in a completely obtrusive manner.
config mirror port <port> {[add | delete] source ports <portlist> [rx | tx | both]}
This command allows a range of ports to have all of their traffic also sent to a
designated port, where a network sniffer or other device can monitor the network
traffic. In addition, users can specify that only traffic received by or sent by one or
both is mirrored to the Target port.
<port> − This specifies the Target port (the port where mirrored packets will be
received). The target port must be configured in the same VLAN and must be
operating at the same speed as the source port. If the target port is operating at a
lower speed, the source port will be forced to drop its operating speed to match that
of the target port.
[add | delete] – Specifies if the user wishes to add or delete ports to be mirrored that
are specified in the source ports parameter.
source ports – The port or ports being mirrored. This cannot include the Target port.
<portlist> − This specifies a port or range of ports that will be mirrored. That is, the
range of ports in which all traffic will be copied and sent to the Target port.
rx − Allows the mirroring of only packets received by (flowing into) the port or ports
in the port list.
tx − Allows the mirroring of only packets sent to (flowing out of) the port or ports in
the port list.
both − Mirrors all the packets received or sent by the port or ports in the port list.
The Target port cannot be listed as a source port.
Only Administrator and Operator-level users can issue this command.
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