Configuration Guide Configuring DHCP Snooping
Interface configuration mode/WLAN security configuration mode
Use this command to reject all DHCP request packets at the port, that is to forbid all users under the port to
apply for addresses via DHCP.
 Configuring DHCP Snooping Source MAC Verification
[ no ] ip dhcp snooping verify mac-address
Global configuration mode
Through the source MAC address verification, the MAC addresses in link headers and the CLIENT MAC
fields in the request packets sent by a DHCP CLIENT are checked for consistence. When the source MAC
address verification fails, packets will be discarded.
 Writing DHCP Snooping Database to Flash Periodically
[ no ] ip dhcp snooping database write-delay [ time ]
time: Indicates the interval between two times of writing the DHCP Snooping database to the Flash.
Global configuration mode
Use this command to write the DHCP Snooping database to FLASH document. This can avoid binding
information loss which requires re-obtaining IP addresses to resume communication after the device
restarts.
 Writing the DHCP Snooping Database to Flash Manually
ip dhcp snooping database write-to-flash
Global configuration mode
Use this command to write the dynamic user information in the DHCP Snooping database in FLASH
documents in real time.
 Importing Flash Storage to the DHCP Snooping Binding Database
renew ip dhcp snooping database
Privileged configuration mode
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