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Configuring Aggregated Ethernet LACP

For aggregated Ethernet interfaces on the QFX Series, you can configure the Link Aggregation Control Protocol (LACP). LACP is one method of bundling several physical interfaces to form one logical interface. You can configure aggregated Ethernet with or without LACP enabled.

Before you configure LACP, be sure you have configured the aggregated Ethernet bundles—also known as link aggregation groups (LAGs).

When LACP is enabled, the local and remote sides of the aggregated Ethernet links exchange protocol data units (PDUs), containing information about the state of the link. You can configure Ethernet links to actively transmit PDUs, or you can configure the links to passively transmit them, sending out LACP PDUs only when they receive them from another link. One side of the link must be configured as active for the link to be up.

Note: Do not add LACP to a LAG if the remote end of the LAG link is a security device, unless the security device supports LACP. Security devices often do not support LACP because they require a deterministic configuration.

To configure LACP:

  1. Enable the LACP mode:
    [edit interfaces]
    user@switch# set aex aggregated-ether-options lacp mode

    For example, to specify the mode as active, execute the following command:

    [edit interfaces]
    user@switch# set aex aggregated-ether-options lacp active
  2. Specify the interval and speed at which the interfaces send LACP packets:
    [edit interfaces]
    user@switch# set aex aggregated-ether-options lacp periodic interval

    For example, to specify the interval as fast, execute the following command:

    [edit interfaces]
    user@switch# set aex aggregated-ether-options lacp periodic fast
 

Related Documentation

 

Published: 2013-01-23

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