Cisco Cisco SG300-28 28-Port Gigabit Managed Switch Technical References
DHCP Snooping Commands
OL-32830-01 Command Line Interface Reference Guide
314
13
Example
The following example configures a device to verify that the source MAC address
in a DHCP packet received on an untrusted port matches the client hardware
address.
in a DHCP packet received on an untrusted port matches the client hardware
address.
switchxxxxxx(config)#
ip dhcp snooping verify
13.6 ip dhcp snooping database
Use the ip dhcp snooping database Global Configuration mode command to
enable the DHCP Snooping binding database file. Use the no form of this
command to delete the DHCP Snooping binding database file.
enable the DHCP Snooping binding database file. Use the no form of this
command to delete the DHCP Snooping binding database file.
Syntax
ip dhcp snooping database
no ip dhcp snooping database
Parameters
N/A
Default Configuration
The DHCP Snooping binding database file is not defined.
Command Mode
Global Configuration mode
User Guidelines
The DHCP Snooping binding database file resides on Flash.
To ensure that the lease time in the database is accurate, the Simple Network Time
Protocol (SNTP) must be enabled and configured.
Protocol (SNTP) must be enabled and configured.
The device writes binding changes to the binding database file only if the device
system clock is synchronized with SNTP.
system clock is synchronized with SNTP.