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DES-7200 Configuration Guide Chapter 9 DHCP Snooping Configuration
9-7
Command Function
DES-7200# configure terminal
Enter the global configuration mode.
DES-7200(config)# [no]ip dhcp snooping verify
mac-address
Enable or disable the source MAC address
check function.
The following example shows how to enable the DHCP source MAC address check function:
DES-7200# configure terminal
DES-7200(config)# ip dhcp snooping verify mac-address
DES-7200(config)# end
9.2.5 Configuring
DHCP
Snooping
Information
Option
By default, this function is disabled. After configuring this command, when DHCP Snooping
forwards the packets, option82 will be added to all DHCP request packets and removed from
all reply packets.
Command Function
DES-7200# configure terminal
Enter the global configuration mode.
DES-7200(config)# [no] ip dhcp snooping
Information option
Enable or disable the DHCP snooping information
option.
The following configuration enables DHCP snooping information option:
DES-7200# configure terminal
DES-7200(config)# ip dhcp snooping information option
DES-7200(config)# end
Caution
After this function is configured, DHCP relay option82 function configured on
the device will be ineffective.
9.2.6 Writing the
DHCP
Snooping
Database to
Flash
Periodically
By default, this function is disabled. DHCP Snooping provides a command to write the DHCP
Snooping database to the flash periodically in order to prevent loss of DHCP user information