Difference between revisions of "Netband Project - IP Source Guard"

Revision as of 13:12, 14 April 2009

<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

Source IP -and Mac address verification

interface FastEthernet0/10
 ip verify source port-security

Source IP address verfication

 interface FastEthernet0/10
 ip verify source

@@ Line 16: / Line 16: @@
 ==Configuration==
-IP-Mac address verification
+Source IP -and Mac address verification
 <pre>
 interface FastEthernet0/10
   ip verify source port-security
 </pre>
-IP address verfication
+Source IP address verfication
 <pre>
   interface FastEthernet0/10
   ip verify source
 </pre>