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ip dhcp snooping information policy <drop | keep | replace>
- drop - Discards the Option 82 information in a packet and then
floods it to the entire VLAN.
- 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 discard the
Option 82 information, 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 policy drop
Console(config)#
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