Dahua NVR5208-EI User Manual page 451

Step 2 Click the LAN name that you want to view, for example, LAN1.
The system displays the information of data sending speed and receiving speed.
System displays LAN1 load by default.
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Only one LAN load can be displayed at one time.
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5.19.3.3 Network Test
You can test the network connection status between the Device and other devices.
Procedure
Step 1 Select Main Menu > Maintenance Center > Network > Test.
Figure 5-317 Network load
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User's Manual