Installation manual

4-170
SIGNAMAX LLC • www.signamax.eu
IP Source Guard Commands
IP Source Guard is a security feature that filters IP traffic on network interfaces based on
manually configured entries in the IP Source Guard table, or static and dynamic entries in
the DHCP Snooping table when enabled (see “DHCP Snooping Commands” on page
4-162). IP source guard can be used to prevent traffic attacks caused when a host tries to
use the IP address of a neighbor to access the network. This section describes
commands used to configure IP Source Guard.
ip source-guard
This command configures the switch to filter inbound traffic based source IP address, or
source IP address and corresponding MAC address. Use the no form to disable this
function.
Syntax
ip source-guard {sip | sip-mac}
no ip source-guard
• sip - Filters traffic based on IP addresses stored in the binding table.
• sip-mac - Filters traffic based on IP addresses and corresponding MAC
addresses stored in the binding table.
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet)
Command Usage
• Source guard is used to filter traffic on an unsecure port which receives messages
from outside the network or firewall, and therefore may be subject to traffic attacks
caused by a host trying to use the IP address of a neighbor.
• Setting source guard mode to “sip” or “sip-mac” enables this function on the
selected port. Use the “sip” option to check the VLAN ID, source IP address, and
port number against all entries in the binding table. Use the “sip-mac” option to
Table 4-45 IP Source Guard Commands
Command Function Mode Page
ip source-guard Configures the switch to filter inbound traffic based on source IP
address, or source IP address and corresponding MAC address
IC 4-170
ip source-guard
binding
Adds a static address to the source-guard binding table GC 4-172
show ip
source-guard
Shows whether source guard is enabled or disabled on each
interface
PE 4-173
show ip
source-guard
binding
Shows the source guard binding table PE 4-173