Edimax Technology BR-6424n - Manual (Page 73)

All MAC-to-IP address entries will be listed in this page, and this
broadband router supports up 16 static DHCP leases:
To delete one or more entries listed here, please check the box of the
mapping entry (under ‘Select’), and click ‘Delete Selected’ button.
If you wish to delete all mapping entries, click ‘Delete All’ button. To
deselect all checked boxes, click ‘Reset’ button.
When you finished with the settings in this page, you can click ‘Apply’
button to save changes you made in this page, or you can click ‘Cancel’
to discard changes. After you click ‘Apply’ button, you’ll see the
following messages:
Please click ‘Apply’ to save changes you made and restart the broadband
router, this requires about 30 seconds and the broadband router will stop
responding (this is normal and is not malfunction). You can reconnect to
this broadband router and continue on other settings later.