Netband Project - IP Source Guard

<accesscontrol>NetBand</accesscontrol> This page is part of the Netband Project

• IP source guard 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. You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor.
  
• IP source guard is supported only on Layer 2 ports, including access and trunk ports
• An ACL is applied to the interface, which allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic.
• Filtering options
  • Source IP address
    • The switch forwards IP traffic when the source IP address matches an entry in the DHCP snooping binding database or a binding in the IP source binding table.
  • Source IP and MAC Address
    • The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table.
    • Filters both ip and non-ip traffic
    • Port security is used to filter source MAC addresses
    • Is not supported on pvlan

Configuration

Source IP -and Mac address verification

interface FastEthernet0/10
 ip verify source port-security

Source IP address verification

interface FastEthernet0/10
 ip verify source