Ip Dhcp Snooping Binding - Cisco Catalyst 3750 Metro Command Reference Manual

ip dhcp snooping binding

ip dhcp snooping binding
Use the ip dhcp snooping binding privileged EXEC command 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.
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(25)EY
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 512
bindings.
Use the show ip dhcp snooping binding privileged EXEC command to display only the dynamically
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
You can verify your settings by entering the show ip dhcp snooping binding or the show ip dhcp source
binding privileged EXEC command.
Catalyst 3750 Metro Switch Command Reference
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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 from 1 to 4904.
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Specify the interval (in seconds) after which the binding entry is no longer
valid.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 from 1 to 4294967295.
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
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