CHAPTER 56
Configuring IP Source Guard
IP Source Guard (IPSG) is a security feature that restricts IP traffic on nonrouted, Layer 2 interfaces by
filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings.
This chapter contains the following topics:
•
Finding Feature Information, page 1291
•
Information About IP Source Guard, page 1291
•
How to Configure IP Source Guard, page 1294
•
Monitoring IP Source Guard, page 1297
•
Additional References, page 1298
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
Information About IP Source Guard
IP Source Guard
You can use IP source guard to prevent traffic attacks if a host tries to use the IP address of its neighbor and
you can enable IP source guard when DHCP snooping is enabled on an untrusted interface.
After IPSG is enabled on an interface, the switch blocks all IP traffic received on the interface except for
DHCP packets allowed by DHCP snooping.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1291
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