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Configuration Guide - Low Latency Network

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document describes the configurations of Buffer optimization of lossless queues, Fast ECN, Fast CNP, Dynamic ECN threshold of lossless queues, and Dynamic load balancing.
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Configuring Dynamic Load Balancing for a LAG

Configuring Dynamic Load Balancing for a LAG



Only the CE6865EI and CE8850-64CQ-EI support this function.

The traditional static load balancing mode does not consider the usage of each member link, and unbalanced loads of member links may occur. Especially, when there are large flows, congestion or even packet loss may occur on member links.

After the dynamic load balancing function is enabled, traffic of a LAG is dynamically load balanced among its member links, providing maximum load balancing between them.


  1. Run system-view

    The system view is displayed.

  2. Run load-balance profile dynamic profile-name

    A dynamic load balancing profile is created and the dynamic load balancing profile view is displayed, or an existing dynamic load balancing profile view is displayed.

    By default, the system defines a dynamic load balancing profile named default. This dynamic load balancing profile can be modified but not deleted.

  3. Run eth-trunk mode { spray | fixed | eligible [ flowlet-gap-time flowlet-gap-time ] }

    The dynamic load balancing mode is configured for the LAG.

    By default, a LAG uses the eligible dynamic load balancing mode, in which the flowlet interval is 1000 microseconds. The eligible dynamic load balancing mode is recommended.

  4. Run quit

    The system view is displayed.

  5. Run interface eth-trunk trunk-id

    The Eth-Trunk interface view is displayed.

  6. Run load-balance dynamic profile profile-name

    The dynamic load balancing profile is applied to the Eth-Trunk interface.

    By default, no dynamic load balancing profile is applied to an Eth-Trunk interface.

  7. Run commit

    The configuration is committed.

Updated: 2019-04-20

Document ID: EDOC1100040243

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