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Install monitoring software on the computer connected to LAN5, and set other ports as mirrored ports. 
The following figure shows the scenario: 
 
Configuration procedure 
Step 1  Choose Network > Port Mirroring. 
Step 2  Click Enable check box of Port Mirroring. 
Step 3  Select the mirrored ports, such as WAN1, LAN2, LAN3, and LAN4, and click OK. 
 
---End 
Verification 
Verify  that  the  computer  installed  with  monitoring  software  (connected  to  the  LAN5  port  of  the  router)  can 
monitor the data packets of the selected mirrored ports.