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DES-3028 DES-3028P DES-3052 DES-3052P Layer 2 Fast Ethernet Switch CLI Reference Manual
15
P
ORT
M
IRRORING
C
OMMANDS
The port mirroring commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in the
following table.
following table.
Command Parameters
config mirror port
<port> [add | delete] source ports <portlist> [rx | tx | both]
enable mirror
disable mirror
show mirror
Each command is listed, in detail, in the following sections.
config mirror port
Purpose
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.
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.
Syntax
config mirror port <port> [add | delete] source ports <portlist>
[rx | tx | both]
[rx | tx | both]
Description
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.
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.
Parameters
<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 a s 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>
same VLAN and must be operating at the same speed a s 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
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
tx
− Allows the mirroring of only packets sent to (flowing out of) the
port or ports in the port list.
both
both
− Mirrors all the packets received or sent by the port or ports in
the port list.
Restrictions
The Target port cannot be listed as a source port. Only
administrator-level users can issue this command.
administrator-level users can issue this command.
Example usage:
To add the mirroring ports:
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