IP DHCP Snooping Commands
ip dhcp snooping database
Cisco 220 Series Smart Plus Switches Command Line Interface Reference Guide Release 1.0.0.x
250
16
Syntax
ip dhcp snooping database {flash | tftp {
IPv4-ADDR NAME
|
HOSTNAME NAME
} |
timeout
VALUE
| write-delay
VALUE
}
no ip dhcp snooping database [timeout | write-delay]
Parameters
•
flash—Specifies that the database agent is in the flash memory.
•
tftp
IPv4-ADDR NAME
—Specifies the IP address of the remote TFTP server
and the file name of the backup file.
•
tftp
HOSTNAME NAME
—Specifies the hostname of the remote TFTP
server and the file name of the backup file.
•
timeout
VALUE
—Specifies the timeout in seconds when to stop the
database transfer process after the DHCP snooping binding database
changes. (Range: 0 to 86400 seconds. Use 0 to define an infinite duration.)
•
write-delay
VALUE
—Specifies the duration in seconds for which the
transfer should be delayed after the binding database changes. (Range: 15
to 86400 seconds)
Default Configuration
The URL for the database agent is not defined.
The default timeout is 300 seconds (5 minutes).
The default write-delay is 300 seconds (5 minutes).
Command Mode
Global Configuration mode
User Guidelines
The DHCP snooping binding database can have up to 256 bindings. Because both
NVRAM and flash memory have limited storage capacity, we recommend that you
store a binding file on a TFTP server. You must create an empty file at the
configured URL on network-based URLs (such as TFTP and FTP) before the switch
can write bindings to the binding file at that URL for the first time.
To save the DHCP snooping binding database in the switch NVRAM, use the ip
dhcp snooping database flash command.
To disable the agent, use the no ip dhcp snooping database command.
