Surecom EP-804CG-S User Manual page 12

Port Mirror Configurations
Port Mirror function allow users to choose a port that can receive the traffic of another
port or of all ports. This function is important for users to diagnose network problem.
The “monitor port” is the port to set to be viewed by the snooping port. The “snooping
port” is the port to view the traffic of the monitored port. The 4/5/8 Port 10/100/1000M
Gigabit Ethernet Desktop Smart Switch go even one step further to let you choose
whether to monitor incoming traffic, outgoing traffic, or both