Creating and managing LAGs

You can create Link Aggregation Groups (LAGs) from the Edge Links view. The system supports the creation of LAGs that include multiple ports on a single leaf node, and also multi-home LAGs (MH-LAGs) that include ports on multiple leaf nodes. For MH-LAGS, the ports should be located on leaf nodes within the same fabric.

Creating LAGs

You can designate multiple edge links on the nodes managed by the Fabric Services System to be aggregated into a LAG. The system supports the creation of both LACP LAGs and Static LAGs.
Note:

LAG configuration is not supported on the initial version of a fabric intent. To configure a LAG, you must first save and deploy Version 1.0 of the fabric intent, and then create a new version of the intent (as described in Creating a new version of a fabric intent). You can configure LAGs for Version 2.0 and greater of a fabric intent.

  1. Choose one of the following:
    • If you are configuring a LAG for a fabric intent that is already deployed, begin by creating a new candidate version of the existing fabric intent as described in Creating a new version of a fabric intent. Then go to step 2.
    • If you are configuring a LAG for Version 2.0 or greater of a fabric intent that has not yet been deployed, go to step 2.
  2. Open the fabric intent as described in Viewing a fabric intent.
  3. Click the View drop-down and select Edge-Links.
  4. Click + CREATE A LAG to begin creating a LAG from the available downlink interfaces.
    If + CREATE A LAG is disabled, make sure your fabric intent has not been deployed. If it is deployed, you must create a new candidate version to create LAGs.
  5. In the LAG Details view, define basic properties for the LAG:

    • Name

    • LAG Type: either LACP or Static.
    • MultiHoming: enable or disable the ability to include ports from different nodes in the same LAG.
    • Single Active: If you enabled Multihoming, optionally enable Single Active to keep a single link active while the other is in standby mode. If Single Active is disabled, both links are active.

      After you enable Single Active, use the Preferred Active drop-down to select the specific link within the LAG to be active.

      Enable the Revertive option if you want traffic that has been switched to the standby link to return to the preferred active link after the fault is resolved.

    • Lag Speed

      Note: The system does not validate that the ports you select as part of the LAG can support the speed you select here. If the configuration is invalid, the system notifies you (and informs you of the reason for failure) when you try to deploy the fabric intent.
  6. Add the edge link interfaces to constitute the LAG:
    1. Click + ADD EDGE LINK INTERFACES.
    2. Select any number of edge link interfaces by checking the box at the left edge of the downlink interface's row.
      Note: If you did not enable MultiHoming, all of the interfaces you select must be located on the same node.
    3. When you have selected the participating edge link interfaces, click ADD.
      The system returns you to the LAG Details overlay, and the downlink interfaces you selected are now displayed in the Edge Link Interfaces panel.
  7. Click SAVE.
    Note: You do not need to configure anything in the Local LAG IDs panel. That list updates automatically to show previously configured LAGs.
    The system returns you to the Edge Links view, and the LAG you created is now displayed in the list as an additional edge link.
  8. You can return to the Fabric Design view, or open another view, by making the corresponding selection from the View drop-down.