Quick Reference Guide

DHCP Snooping 173
DELL CONFIDENTIAL – PRELIMINARY 5/15/12 – FOR PROOF ONLY
ip dhcp snooping database update-freq
The ip dhcp snooping database update-freq Global Configuration mode command configures the
update frequency of the DHCP snooping binding file. Use the no form of this command to return to
default.
Syntax
• ip dhcp snooping database update-freq seconds
• no ip dhcp snooping database update-freq
• seconds — Specifies the update frequency in seconds. (Range 600 – 86400)
Default Configuration
The default configuration is 1200.
Command Mode
Global Configuration mode.
User Guidelines
There are no user guidelines for this command.
Example
The following example configures the update frequency of the DHCP snooping binding file to be
24000 seconds.
ip dhcp snooping binding
The ip dhcp snooping binding Privileged EXEC mode command configures the DHCP snooping
binding database and adds binding entries to the database. Use the no form of this command to
delete entries from the binding database.
Syntax
• ip dhcp snooping binding mac-address vlan-id ip-address { ethernet interface | port-channel
port-channel-number } expiry seconds
• no ip dhcp snooping database binding mac-address vlan-id
• mac-address — Specifies a MAC address.
•
vlan-id — Specifies a VLAN number.
•
ip-address — Specifies an IP address.
•
interface — Specifies an Ethernet port.
console(config)# ip dhcp snooping database update-freq 24000