DHCP Snooping Properties

DHCP Snooping Status—Check Enable to enable DHCP Snooping on the switch, or uncheck to disable this feature. By default, DHCP Snooping is disabled.

DHCP Packet Validation—Check Enable to enable verifying (on an untrusted port) that the source MAC address of the Layer 2 header matches the client hardware address as appears in the DHCP Header (part of the payload), uncheck to disable this feature. By default, it is disabled.

Option 82 Status—Check Enable to enable global Option 82 insert on the switch, or uncheck to disable this feature.

Remote ID—If Option 82 is enabled, select User Defined to manually enter the format remote ID, or select Use Default to use the default value.

Backup Database Type—Set the type of backup DHCP Snooping database agent. The options are:

• None—Disables DHCP Snooping database agent.

• Flash—Saves DHCP Snooping binding database in the switch NVRAM.

• TFTP—Saves DHCP Snooping binding database on a TFTP server.

File Name—When TFTP is selected, enter the file name of the DHCP Snooping settings that will be written to the TFTP server.

Server IP Address—When TFTP is selected, enter the IP address or host name of the remote TFTP server.

Write Delay—Enter the duration in seconds for which the transfer should be delayed after the DHCP Snooping binding database changes. The default is 300 seconds. The range is from 15 to 86400 seconds.

Timeout—Enter the value in seconds when to stop the database transfer process after the DHCP Snooping binding database changes. The default is 300 seconds. The range is from 0 to 86400. Use 0 to define an Infinite duration