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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 -301). 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
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 4-296
ip source-guard
binding
Adds a static address to the source-guard
binding table
GC 4-298
show ip
source-guard
Shows whether source guard is enabled or
disabled on each interface
PE 4-300
show ip
source-guard
binding
Shows the source guard binding table PE 4-300
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