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Cisco 300 Series User Manual

Cisco 300 Series
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DHCP Snooping Commands
OL-32830-01 Command Line Interface Reference Guide 320
13
13.12 ip source-guard
Use the ip source-guard command in Configuration mode or Interface
Configuration mode to enable IP Source Guard globally on a device or in Interface
Configuration (Ethernet, Port-channel) mode to enable IP Source Guard on an
interface.
Use the no form of this command to disable IP Source Guard on the device or on
an interface.
Syntax
ip source-guard
no ip source-guard
Parameters
N/A
Default Configuration
IP Source Guard is disabled.
Command Mode
Interface (Ethernet, Port Channel) Configuration mode
User Guidelines
IP Source Guard must be enabled globally before enabling IP Source Guard on an
interface.
IP Source Guard is active only on DHCP snooping untrusted interfaces, and if at
least one of the interface VLANs are DHCP snooping enabled.
Example
The following example enables IP Source Guard on gi14.
switchxxxxxx(config)#
interface
gi1
4
switchxxxxxx(config-if)#
ip source-guard

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Cisco 300 Series Specifications

General IconGeneral
ModelCisco 300 Series
CategorySwitch
DimensionsVaries by model
WeightVaries by model
Power over Ethernet (PoE)Available on select models
ManagementWeb-based GUI, SNMP, CLI
VLANsUp to 256
Security FeaturesACLs, 802.1X, Port Security
Humidity10% to 90% non-condensing
Ports8, 16, 24, 48

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