Cisco WS-C3020 Software Configuration Manual page 455

Chapter 21 Configuring Dynamic ARP Inspection
For configuration guidelines for rate limiting trunk ports and EtherChannel ports, see the
Inspection Configuration Guidelines" section on page
Beginning in privileged EXEC mode, follow these steps to limit the rate of incoming ARP packets. This
procedure is optional.
Command
Step 1
configure terminal
Step 2 interface interface-id
Step 3 ip arp inspection limit {rate pps [burst
interval seconds] | none}
Step 4 exit
Step 5
errdisable recovery cause
arp-inspection interval interval
Step 6
exit
Step 7 show ip arp inspection interfaces
show errdisable recovery
Step 8 copy running-config startup-config
To return to the default rate-limit configuration, use the no ip arp inspection limit interface
configuration command. To disable error recovery for dynamic ARP inspection, use the no errdisable
recovery cause arp-inspection global configuration command.
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21-6.
Purpose
Enter global configuration mode.
Specify the interface to be rate-limited, and enter interface configuration
mode.
Limit the rate of incoming ARP requests and responses on the interface.
The default rate is 15 pps on untrusted interfaces and unlimited on
trusted interfaces. The burst interval is 1 second.
The keywords have these meanings:
For rate pps, specify an upper limit for the number of incoming
•
packets processed per second. The range is 0 to 2048 pps.
(Optional) For burst interval seconds, specify the consecutive
•
interval in seconds, over which the interface is monitored for a high
rate of ARP packets.The range is 1 to 15.
For rate none, specify no upper limit for the rate of incoming ARP
•
packets that can be processed.
Return to global configuration mode.
(Optional) Enable error recovery from the dynamic ARP inspection
error-disable state.
By default, recovery is disabled, and the recovery interval is 300
seconds.
For interval interval, specify the time in seconds to recover from the
error-disable state. The range is 30 to 86400.
Return to privileged EXEC mode.
Verify your settings.
(Optional) Save your entries in the configuration file.
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
Configuring Dynamic ARP Inspection
"Dynamic ARP
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