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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Command Reference
OL-13271-03
Chapter 2 Cisco Catalyst Blade Switch 3130 and 3032 for Dell Cisco IOS Commands
ip arp inspection validate
ip arp inspection validate
Use the
ip arp inspection
validate
global configuration command on the switch stack or on a standalone
switch to perform specific checks for dynamic Address Resolution Protocol (ARP) inspection. Use the
no
form of this command to return to the default settings.
ip arp inspection validate
{[
src-mac
] [
dst-mac
] [
ip
[
allow zeros
]
]}
no ip arp inspection validate
[
src-mac
] [
dst-mac
] [
ip
[
allow zeros
]
]
This command is supported only if your switch is running the IP services feature set.
Syntax Description
Defaults
No checks are performed.
Command Modes
Global configuration
Command History
Usage Guidelines
You must specify at least one of the keywords. Each command overrides the configuration of the
previous command; that is, if a command enables
src-mac
and
dst-mac
validations, and a second
command enables IP validation only, the
src-mac
and
dst-mac
validations are disabled as a result of the
second command.
src-mac
Compare the source MAC address in the Ethernet header against the sender MAC
address in the ARP body. This check is performed on both ARP requests and
responses.
When enabled, packets with different MAC addresses are classified as invalid and are
dropped.
dst-mac
Compare the destination MAC address in the Ethernet header against the target MAC
address in ARP body. This check is performed for ARP responses.
When enabled, packets with different MAC addresses are classified as invalid and are
dropped.
ip
Compare the ARP body for invalid and unexpected IP addresses. Addresses include
0.0.0.0, 255.255.255.255, and all IP multicast addresses.
Sender IP addresses are compared in all ARP requests and responses. Target IP
addresses are checked only in ARP responses.
allow-zeros
Modifies the IP validation test so that ARPs with a sender address of 0.0.0.0 (ARP
probes) are not denied.
Release
Modification
12.2(40)EX1
This command was introduced.