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DCS-3950 series Ethernet switch manual
7.2.3.5.1 show monitor
Command：show monitor
Function：Display the source and destination port information of the image.
Command mode：Admin Mode
Usage Guide: Information about source and destination port can be displayed by this
command.
Example:
Switch#show monitor
session number : 1
Source ports: Ethernet0/0/8 Ethernet0/0/9
RX: No
TX: No
Both: Yes
Destination port: Ethernet0/0/24
Display information Explanation
session number Session number of the image
Source ports Source ports of the image
RX The image in the receiving direction of the port.
TX The image in the transmitting direction of the port.
Both The images in both the receiving and transmitting
directions of the port.
Destination port Destination port of the image
7.2.3.5.2 debug mirror
Command：debug mirror
no debug mirror
Function：Enable the debug information of the mirror, the ‘no debug mirror’ command is
used to disable the debug information of the mirror.
Command mode：Admin Mode
7.2.3.5.3 Device Mirroring Troubleshooting
If problems occur on configuring port mirroring, please check the following first for
causes:
& Whether the mirror destination port is a member of a trunk group or not, if yes, modify
the trunk group.
& If the throughput of mirror destination port is smaller than the total throughput of
mirror source port(s), the destination port will not be able to duplicate all source port
traffic; please decrease the number of source ports, duplicate traffic for one direction
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