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DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch CLI Manual
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MIRROR COMMANDS
The primary purpose of the mirror function is to copy frames transmitted and received on a port and redirect the copies to
another port.
The application attaches a monitoring device to the mirrored port, such as a sniffer or an RMON probe, to view details
about the packets passing through the first port. This is useful for network monitoring and troubleshooting purposes.
NOTE: When the device with the source port has been removed from a stack, the configuration will
be disabled temporarily until another device has been installed in its place. If configurations are saved
to NVR RAM during this period the configuration will be removed forever.
The Mirror commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in the
following table.
Command Parameters
config mirror port <port> {[add | delete] source ports <portlist> [rx | tx | both]}
enable mirror
disable mirror
show mirror {group_id <value 1-4>}
create mirror group_id <value 1-4>
delete mirror group_id <value 1-4>
config mirror group_id <value 1-4> {target_port <port> | [add | delete] source ports <portlist> [rx | tx |
both] | state [enable | disable]}(1)
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
then can be attached to study the traffic crossing the source port in a completely unobtrusive
manner. When mirroring port traffic, please note that the target port must be configured in the
same VLAN and operates 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.
Syntax
config mirror port <port> {[add | delete] source ports <portlist> [rx | tx | both]}
Description The config mirror command allows a range of ports to have all of their traffic also sent to a
destination port − where a network sniffer or other device can monitor the network traffic. In
addition, you can specify that only traffic received by or sent by or both are mirrored to the
target port.
This command used for single mirror session configuration primarily. If used for multiple
session configurations, it configures the parameters on mirror group 1. If group 1 not exist,
create group 1 firstly, and than configure the parameters on group 1.
Parameters
port - The port that will receive the packets duplicated at the mirror port.
add - The mirror entry to be added.
delete - The mirror entry to be deleted.