Ip Dhcp Snooping Binding - Cisco Catalyst 3560X-24P Command Reference Manual

ip dhcp snooping binding

ip dhcp snooping binding
Use the ip dhcp snooping binding privileged EXEC command on the switch stack or on a standalone
switch to configure the DHCP snooping binding database and to add binding entries to the database. Use
the no form of this command to delete entries from the binding database.
This command is available only if your switch is running the IP services feature set.
Syntax Description
mac-address
vlan vlan-id
ip-address
interface interface-id
expiry seconds
Defaults
No default database is defined.
Command Modes
Privileged EXEC
Command History Release
12.2(53)SE2
Usage Guidelines
Use this command when you are testing or debugging the switch.
In the DHCP snooping binding database, each database entry, also referred to a binding, has an IP
address, an associated MAC address, the lease time (in hexadecimal format), the interface to which the
binding applies, and the VLAN to which the interface belongs. The database can have up to 8192
bindings.
Use the show ip dhcp snooping binding privileged EXEC command to display only the configured
bindings. Use the show ip source binding privileged EXEC command to display the dynamically and
statically configured bindings.
Examples This example shows how to generate a DHCP binding configuration with an expiration time of
1000 seconds on a port in VLAN 1:
Switch# ip dhcp snooping binding 0001.1234.1234 vlan 1 172.20.50.5 interface
gigabitethernet1/0/1 expiry 1000
Catalyst 3750-X and 3560-X Switch Command Reference
2-240
ip dhcp snooping binding mac-address vlan vlan-id ip-address interface interface-id expiry
seconds
no ip dhcp snooping binding mac-address vlan vlan-id ip-address interface interface-id
Specify a MAC address.
Specify a VLAN number. The range is 1 to 4094.
Specify an IP address.
Specify an interface on which to add or delete a binding entry.
Specify the interval (in seconds) after which the binding entry is no longer
valid. The range is 1 to 4294967295.
Modification
This command was introduced.
Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
OL-21522-02