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IP Source Guard Commands
4-313
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interface (4-166)
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 4-317). 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.
Console#ping 10.1.0.9
Type ESC to abort.
PING to 10.1.0.9, by 5 32-byte payload ICMP packets, timeout is 5 seconds
response time: 10 ms
response time: 10 ms
response time: 10 ms
response time: 10 ms
response time: 10 ms
Ping statistics for 10.1.0.9:
5 packets transmitted, 5 packets received (100%), 0 packets lost (0%)
Approximate round trip times:
Minimum = 10 ms, Maximum = 20 ms, Average = 10 ms
Console#
Table 4-84 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 4-313
ip source-guard
binding
Adds a static address to the source-guard binding table GC 4-315
show ip
source-guard
Shows whether source guard is enabled or disabled on each
interface
PE 4-316
show ip
source-guard
binding
Shows the source guard binding table PE 4-316