Ip Dhcp Snooping Binding - Cisco Catalyst 4500 Series Configuration Manual

Chapter 2

ip dhcp snooping binding

To set up and generate a DHCP binding configuration to restore bindings across reboots, use the ip dhcp
snooping binding command. To disable the binding configuration, use the no form of this command.
Syntax Description
mac-address
vlan vlan-#
ip-address
interface interface
expiry seconds
Command Default
This command has no default settings.
Command Modes Privileged EXEC mode
Command History Release
12.1(19)EW
12.2(25)EW
Usage Guidelines
Whenever a binding is added or removed using this command, the binding database is marked as changed
and a write is initiated.
Examples The following example shows how to generate a DHCP binding configuration on interface
gigabitethernet1/1 in VLAN 1 with an expiration time of 1000 seconds:
Switch# ip dhcp snooping binding 0001.1234.1234 vlan 1 172.20.50.5 interface gi1/1 expiry 1000
Switch#
Related Commands Command
ip dhcp snooping
ip dhcp snooping information option
ip dhcp snooping trust
ip dhcp snooping vlan
ip dhcp snooping binding mac-address vlan vlan-# ip-address interface interface expiry seconds
no ip dhcp snooping binding mac-address vlan vlan-# ip-address interface interface
Specifies a MAC address.
Specifies a valid VLAN number.
Specifies an IP address.
Specifies an interface type and number.
Specifies the interval (in seconds) after which binding is no longer valid.
Modification
This command was introduced on the Catalyst 4500 series switch.
Support for the 10-Gigabit Ethernet interface was introduced on the Catalyst 4500
series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
Description
Globally enables DHCP snooping.
Enables DHCP option 82 data insertion.
Enables DHCP snooping on a trusted VLAN.
Enables DHCP snooping on a VLAN or a group of VLANs.
ip dhcp snooping binding
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