SMC Networks 8124PL2, Management Manual

Page: 466 / 491

DHCP Snooping Commands
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Example
This example enables the DHCP Snooping Information Option.
ip dhcp snooping information policy
This command sets the DHCP snooping information option policy for DHCP client
packets that include Option 82 information.
Syntax
ip dhcp snooping information policy < drop | keep | replace >
• drop - Discards all DHCP client packets with Option 82 information.
• keep - Retains the client’s DHCP information
• replace - Overwrites the DHCP client packet information with the switch’s
relay information.
Default Setting
replace
Command Mode
Global Configuration
Command Usage
When the switch receives DHCP packets from clients that already include
DHCP Option 82 information, the switch can be configured to set the action
policy for these packets. Either the switch can drop the DHCP packets, keep
the existing information, or replace it with the switch’s relay information.
Example
ip dhcp snooping database flash
This command writes all dynamically learned snooping entries to flash memory.
Command Mode
Global Configuration
Command Usage
This command can be used to store the currently learned dynamic DHCP
snooping entries to flash memory. These entries will be restored to the
snooping table when the switch is reset. However, note that the lease time
shown for a dynamic entry that has been restored from flash memory will no
longer be valid.
Console(config)#ip dhcp snooping information option
Console(config)#
Console(config)#ip dhcp snooping information policy drop
Console(config)#