Chapter 8
| General Security Measures
DHCPv4 Snooping
– 291 –
Related Commands
ip dhcp snooping (281)
ip dhcp snooping vlan (288)
clear ip dhcp
snooping binding
This command clears DHCP snooping binding table entries from RAM. Use this
command without any optional keywords to clear all entries from the binding
table.
Syntax
clear ip dhcp snooping binding [mac-address vlan vlan-id]
mac-address - Specifies a MAC address entry.
(Format: xx-xx-xx-xx-xx-xx)
vlan-id - ID of a configured VLAN. (Range: 1-4094)
Command Mode
Privileged Exec
Example
Console#clear ip dhcp snooping binding 11-22-33-44-55-66 vlan 1
Console#
clear ip dhcp
snooping database
flash
This command removes all dynamically learned snooping entries from flash
memory.
Command Mode
Privileged Exec
Example
Console#ip dhcp snooping database flash
Console#
ip dhcp snooping
database flash
This command writes all dynamically learned snooping entries to flash memory.
Command Mode
Privileged Exec
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.
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