DGS-3100 Series Gigabit Stackable Managed Switch CLI Manual 
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PORT MIRRORING COMMANDS 
The Port Mirroring commands in the Command Line Interface (CLI) are listed (along with the appropriate 
parameters) in the following table. 
 
Command  Parameter 
config mirror  target <port> source <port> direction [ingress | egress | both] 
delete mirror  target <port> source <port> 
show mirror 
 
 
Each command is listed in detail, as follows: 
 
config mirror 
Purpose  To configure a mirror port − source port pair on the Switch. 
Syntax 
config mirror target <port> source <port> direction [ingress | 
egress | both] 
Description The config mirror command allows a port to have all of its traffic 
also sent to a designated port, where a network sniffer or other 
device can monitor the network traffic. In addition, one can specify 
that only traffic received by or sent by one or both is mirrored to the 
target port. 
Parameters  target <port> − Specifies the port that mirrors traffic forwarding. 
source <port> – Specifies the port or ports being mirrored. This 
cannot include the target port. 
ingress – Allows mirroring of packets received by (flowing into) the 
source port. 
egress – Allows mirroring of packets sent to (flowing out of) the 
source port. 
both – Allows mirroring of all the packets received or sent by the 
source port. 
Comment: The user can define up to 8 source ports and one 
destination port. One source port can be configured each time using 
one CLI command, So in order to configure multiple source ports, 
multiple CLI commands should be used.  
Restrictions  A target port cannot be listed as a source port. Only Administrator or 
operator-level users can issue this command. 
Example usage: 
To add the mirroring ports: 
DGS3100# config mirror source 1 target port 2 direction ingress 
 
Success. 
 
DGS3100#