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S600-E V200R011C10 Configuration Guide - Network Management and Monitoring

This document provides the configurations of network management and monitoring features supported by the product, including SNMP, RMON, LLDP, NQA, Service Diagnosis, Mirroring, Packet Capture, and sFlow.
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Configuring a Device to Capture Packets Sent to the CPU

Configuring a Device to Capture Packets Sent to the CPU

Context

When a CPU fault occurs, capture packets sent to the CPU for analysis. You can configure ACL rules to match the packets you want to capture.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run capture-packet cpu [ vlan vlan-id | acl acl-number ] * destination { file file-name | terminal } * [ time-out time-out-value | packet-num number | packet-len length ] *

    The device is configured to capture packets sent to the CPU.

    NOTE:
    • If the IP addresses of ARP packets on the control plane match the IP addresses in a basic or advanced ACL, these ARP packets can also be captured.
    • When the CPU usage is above 80%, executing this command will keep the CPU usage increasing.
    • The packet capture configuration is not saved in the configuration file, and becomes invalid when packet capture is complete.
    • Different packet capture instances cannot be executed simultaneously. That is, a new packet capture instance can be executed only when the previous one is complete.
    • The system limits the rate of captured packets. The default rate limit is 64 kbit/s. If the rate of packets exceeds the limit, some packets may be discarded.

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Updated: 2019-03-30

Document ID: EDOC1000178020

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