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IP ARP Inspection Commands
ip arp inspection trust
ip arp inspection trust
Cisco 220 Series Smart Plus Switches Command Line Interface Reference Guide Release 1.0.0.x
To configure the trust state that determines which incoming ARP packets are
inspected for an interface, use the ip arp inspection trust Interface Configuration
mode command.
To revert to its default setting, use the no form of this command.
Syntax
ip arp inspection trust
no ip arp inspection trust
Parameters
N/A
Default Configuration
The interface is untrusted.
Command Mode
Interface Configuration mode
User Guidelines
The switch does not check ARP packets that are received on the trusted interface.
It only forwards these packets.
For untrusted interfaces, the switch intercepts all ARP requests and responses. It
verifies that the intercepted packets have valid IP-to-MAC address bindings
before updating the local cache and before forwarding the packet to the
appropriate destination.
Example
switchxxxxxx(config)# interface gi9
switchxxxxxx(config-if)# ip arp inspection trust
15
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