Command Line Interface
4-318
4
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 4-322). 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”
Table 4-87 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
4-318
ip source-guard
binding
Adds a static address to the source-guard binding table
GC
4-320
show ip
source-guard
Shows whether source guard is enabled or disabled on each
interface
PE
4-321
show ip
source-guard
binding
Shows the source guard binding table
PE
4-321
Summary of Contents for 6128PL2
Page 2: ......
Page 8: ...viii ...
Page 26: ...Contents xviii ...
Page 30: ...Tables xxii ...
Page 52: ...Initial Configuration 2 10 2 ...
Page 308: ...Configuring the Switch 3 256 3 ...
Page 473: ...SNMP Commands 4 165 4 ...
Page 644: ...Command Line Interface 4 336 4 ...
Page 648: ...Software Specifications A 4 A ...
Page 663: ......