Zhone 6218-I2 User Manual page 56

Advanced Setup
If you want to add a setting to the MAC filtering table, enter the Source and
Destination MAC address, and select protocol type, frame direction, and
WAN interface. Then click on Save/Apply to save it.
Figure 52: IP Filtering - MAC Filtering Add Page
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6218-I2 Wireless Router User's Guide 6218-A2-ZB23-10