Cisco Catalyst 4500 Series Command Reference Guide

2-318
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
ip dhcp snooping limit rate
ip dhcp snooping limit rate
To configure the number of the DHCP messages that an interface can receive per second, use the ip dhcp
snooping limit rate command. To disable the DHCP snooping rate limiting, use the no form of this
command.
ip dhcp snooping limit rate rate
no ip dhcp snooping limit rate
Syntax Description
Defaults DHCP snooping rate limiting is disabled.
Command Modes Interface configuration mode
Command History
Usage Guidelines Typically, the rate limit applies to the untrusted interfaces. If you want to set up rate limiting for the
trusted interfaces, note that the trusted interfaces aggregate all DHCP traffic in the switch, and you will
need to adjust the rate limit of the interfaces to a higher value.
Examples This example shows how to enable the DHCP message rate limiting:
Switch(config-if)# ip dhcp snooping limit rate 150
Switch(config)#
This example shows how to disable the DHCP message rate limiting:
Switch(config-if)# no ip dhcp snooping limit rate
Switch(config)#
Related Commands
rate Number of DHCP messages a switch can receive per second.
Release Modification
12.1(12c)EW Support for this command was introduced on the Catalyst 4500 series switch.
Command Description
ip dhcp snooping Globally enables DHCP snooping.
ip dhcp snooping information option Enables DHCP option 82 data insertion.
ip dhcp snooping trust Enables DHCP snooping on a trusted VLAN.
ip dhcp snooping vlan Enables DHCP snooping on a VLAN or a group of VLANs.
show ip dhcp snooping Displays the DHCP snooping configuration.
show ip dhcp snooping binding Displays the DHCP snooping binding entries.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E