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Configuration guidelines
Configure this feature when ARP attack detection, ARP snooping, or ARP fast-reply is enabled, or
when ARP flood attacks are detected.
Configuration procedure
This task sets a rate limit for ARP packets received on an interface. When the receiving rate of ARP
packets on the interface exceeds the rate limit, those packets are discarded.
You can enable sending notifications to the SNMP module or enable logging for ARP packet rate
limit.
•
If notification sending is enabled, the device sends the highest threshold-crossed ARP packet
rate within the sending interval in a notification to the SNMP module. You must use the
snmp-agent target-host
command to set the notification type and target host. For more
information about notifications, see
Network Management and Monitoring Command
Reference
.
•
If logging for ARP packet rate limit is enabled, the device sends the highest threshold-crossed
ARP packet rate within the sending interval in a log message to the information center. You can
configure the information center module to set the log output rules. For more information about
information center, see
Network Management and Monitoring Configuration Guide
.
To configure ARP packet rate limit:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
(Optional.) Enable
notification sending for ARP
packet rate limit.
snmp-agent trap enable arp
[
rate-limit
]
By default, notification sending for
ARP packet rate limit is disabled.
3.
(Optional.) Enable logging for
ARP packet rate limit.
arp rate-limit log enable
By default, logging for ARP packet
rate limit is disabled.
4.
(Optional.) Set the
notification and log message
sending interval.
arp rate-limit log interval
interval
By default, the device sends
notifications and log messages
every 60 seconds.
5.
Enter Layer 2 Ethernet
interface, Layer 2 aggregate
interface, Layer 3 Ethernet
interface, or Layer 3
aggregate interface view.
interface
interface-type
interface-number
N/A
6.
Enable ARP packet rate limit.
arp rate-limit
[
pps
]
By default, ARP packet rate limit is
enabled.
NOTE:
If you enable notification sending and logging for ARP packet rate limit on a Layer 2 aggregate
interface, the features apply to all aggregation member ports.
Configuring source MAC-based ARP attack
detection
This feature checks the number of ARP packets delivered to the CPU. If the number of packets from
the same MAC address within 5 seconds exceeds a threshold, the device generates an ARP attack
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