3Com Switch 7750 Configuration Guide

Displaying and Maintaining ARP Configuration 579
Configuring ARP Source
Suppression
By setting the maximum numbers of ARP packets of different types that can be
sent to the CPU in a unit of time, you can protect the CPU from being attacked by
illegal ARP packets.
Displaying and
Maintaining ARP
Configuration
After the above configuration, execute the display command in any view to
display and verify the ARP configuration.
Execute the reset command in user view to clear ARP entries.
Configure the maximum ARP
packet receive rate on the
port
arp rate-limit rate Optional
By default, the maximum ARP
packet receive rate on a port
is 15pps.
Configure the port state
auto-recovery interval
arp protective-down
recover interval time
Optional
300 seconds by default.
Configure the port as a
trusted port for ARP packet
rate limit
arp rate-limit trust Optional
By default, the port is an
untrusted port.
Table 457 Configure the ARP packet rate limit function
Operation Command Description
Table 458 Configure ARP source suppression
Operation Command Description
Enter system view system-view -
Configure the maximum
number of ARP packets
of a type that can be sent
to the CPU in a unit of
time
arp source-suppression
limit { total | local |
through } limit-value
Optional
The default value varies with the type
of ARP packets
■ When total is adopted, the
default value is 100.
■ When local is adopted, the
default value is 3.
■ When through is adopted, the
default value is 3.