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. The rate limit is 2000 pps for the following modules:
The rate limit is 750 pps for other modules. |
![[NOTE: ]](images/note.png) | 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. | |