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Chapter 18 Command for ARP GUARD
18.1 arp-guard ip
Command: arp-guard ip <addr>
Function: Add a ARP GUARD address, the no command deletes ARP GUARD address.
Parameters: <addr> is the protected IP address, in dotted decimal notation.
Default: There is no ARP GUARD address by default.
Command Mode: Port configuration mode
Usage Guide: After configuring the ARP GUARD address, the ARP messages received
from the ports configured ARP GUARD will be filtered. If the source IP addresses of the
ARP messagse match the ARP GUARD address configured on this port, these messages
will be judged as ARP cheating messages, which will be directly dropped instead of
sending to the CPU of the switch or forwarding. 16 ARP GUARD addresses can be
configured on each port.
Example:
Configure the ARP GUARD address on port ethernet1/1 as 100.1.1.1.
switch(config)#interface ethernet1/1
switch(Config-If-Ethernet 1/1)#arp-guard ip 100.1.1.1
Delete the ARP GUARD address on port ethernet1/1 as 100.1.1.1.
switch(config)#interface ethernet1/1
switch(Config-If-Ethernet 1/1)#no arp-guard ip 100.1.1.1
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