DocsICP FilingConsole
Documentation
Home Page Alibaba Cloud Linux Operating System Console System diagnostics Node diagnostics Network diagnostics Packet loss diagnosis

Packet loss diagnosis

Updated at:
Copy as MD
Product
My Favorites

Network packet loss can occur in the operating system kernel for various reasons. Use the packet loss diagnosis feature to analyze root causes and find solutions.

Use cases

  • For packet loss caused by system configuration errors, the feature prompts you to adjust the configuration parameters.

  • If an instance's iptables rules or drivers cause packet loss, the feature prompts you to check the iptables configuration or drivers.

Note

For other scenarios, the packet loss diagnosis feature displays key metrics and recommends that you submit a ticket for further assistance.

Limitations

  • Region availability

  • Supported operating systems

    Architecture

    Operating System

    x86

    • Rocky Linux 9.5

    • Rocky Linux 9.1

    • Ubuntu 20.04

    • Alibaba Cloud Linux 3 Container Optimized Edition

    • Rocky Linux 8.8

    • Ubuntu 22.04

    • Alibaba Cloud Linux 3 Pro

    • Alibaba Cloud Linux 2/3

    • CentOS 7.6 or later, or CentOS 8

    • Anolis OS 7/8

    • Ubuntu 24.04

    ARM

    • Alibaba Cloud Linux 3 Pro

    • Alibaba Cloud Linux 3

Prerequisites

  • If you use a RAM user, make sure that the Alibaba Cloud account (primary account) has granted the RAM user the AliyunECSReadOnlyAccess and AliyunSysomFullAccess system policies.

  • The console permissions are activated.

    The first time you log on to the Operating System Console, click Activate Service to activate the console service.

Procedure

  1. Go to Operating System Console.

  2. In the left-side navigation pane, click System Diagnosis.

  3. In the upper part of the left-side navigation pane, select the region in which the target instance resides.

    image

  4. From the Diagnosis Type list, select Network Diagnosis. From the Diagnosis Item list, select Packet Loss Diagnosis. Enter the instance ID and click Run Diagnosis.

    Note

    If SysOM is not installed, the system automatically installs SysOM on the target ECS instance and then starts the diagnosis after you click Run Diagnosis.

  5. In the Diagnosis Records section, click View Report.

Diagnosis report

  • Basic Information

    The Basic Information section summarizes the diagnosis with key details, including the instance ID (which serves as the resource ID), diagnosis item, diagnostic report ID, and diagnosis start time.

  • Diagnosis Conclusion

    This section displays the conclusion of the diagnosis, providing a detailed description of the system status and the number of dropped packets.

  • Diagnosis Suggestion

    This section provides recommendations based on the diagnosis results to help you reduce or eliminate network packet loss.

  • Diagnosis Details

    This section displays detailed diagnostic data and explains the key fields.

    • Time: The time when the network packet loss was captured.

    • Packet Information: The 5-tuple of the dropped packet.

    • Number of Packets: The number of dropped packets.

    • Packet Loss Reason: The reason for the packet loss.

    • Fix Suggestion: The recommended solution.

Previous：Network diagnosticsNext：Network jitter