Allied Telesis AT-GS950/8 - Manual (Page 230)

Chapter 16: DHCP Snooping
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through the switch without regard to the IP and MAC Address
information in the packet header.
6. From the Backup Database field, select one of the following choices
from the pull-down menu:
Enable - The AT-S107 Management software saves a backup
copy of the Binding Table to flash at a specified interval (Database
Update Interval) of time.
Disable - The AT-S107 Management software does not save a
backup copy of the Binding Table to flash.
7. Select an interval of time for the Database Update Interval field. The
range of this interval is 600 to 86400 seconds.
8. From the DHCP Option 82 Insertion field, select one of the following
choices from the pull-down menu:
Enable - The AT-S107 Management software inserts the DHCP
Option 82 information into the DHCP packets.
Disable - The AT-S107 Management software does not insert the
DHCP Option 82 information into the DHCP packets.
9. Click Apply. The values for the DHCP Snooping General Settings take
effect.
10. From the main menu on the left side of the page, select Save
Configuration to Flash to permanently save your changes.