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  • 1.  ArubaOS to ArubaOS Link Aggregation, non-LACP "trunk" command

    Posted Jan 07, 2025 07:56 AM

    On our old HP 5406zl we have old hosts with multiple NICs, aggregately connected with the `trunk D7-D8 trk11 trunk` command.

    Notice the "lacp" option is not used in this command.

    For our Aruba 6405, running ArubaOS-CX, what is the equivalent command?

    In the command comparison document listed here on page 131, (https://arubase.club/wp-content/uploads/2019/05/CLI_Reference_Guide_for_ArubaOS-CX_ArubaOS-Switch_Comware_and_Cisco_IOS.pdf) it says 

    "interface lag 1" is equivalent to "Trunk 1/20,1/24 trk1 lacp"

    but I want the ArubaOS-CX command equivalent to "Trunk 1/20,1/24 trk1 trunk"

    How would I configure this in ArubaOS-CX?

    John



  • 2.  RE: ArubaOS to ArubaOS Link Aggregation, non-LACP "trunk" command

    Posted Jan 07, 2025 08:28 AM

    Hi

     

    Just do not configure any "lacp mode active|passive" command in the "interface lag xx".

    See also: https://www.arubanetworks.com/techdocs/AOS-CX/10.15/HTML/link_aggregation/Content/Chp_LAG/con-l2-sta-agg-gro-10.htm

     

    Regards,

    Thomas






  • 3.  RE: ArubaOS to ArubaOS Link Aggregation, non-LACP "trunk" command

    Posted Jan 07, 2025 08:35 AM

    Why not use LACP ?

    Better control of the lag and you will not send data into a blackhole.

    The LAG guide is here:

    https://www.arubanetworks.com/techdocs/AOS-CX/10.14/PDF/link_aggregation.pdf

    lag without LACP is a static lag.

    think you can use this (i always use LACP though):

    #

    interface lag 1

       no lacp mode {active

    #

    a lag without lacp would be static.

    This is from the guide:

    LACP operating modes
    LACP can operate in active or passive mode.
    n Active mode: When the LACP is operating in active mode on either end of a link, both ports can send
    PDUs. The "active" LACP initiates an LACP connection by sending LACPDUs. The "passive" LACP will
    wait for the remote end to initiate the link.
    n Passive mode: When the LACP is operating in passive mode on a local member port and as its peer
    port, both ports cannot send PDUs.
    Two peer ports operating in "passive" mode will never establish an LACP link.
    For an LACP LAG, one side must have LACP in active mode and the peer must have an LACP
    configuration of active or passive mode. If you do not

    Hope it helps




  • 4.  RE: ArubaOS to ArubaOS Link Aggregation, non-LACP "trunk" command

    Posted Jan 07, 2025 09:33 AM

    ...perhaps because there are servers connected, not switches. Servers typically do "teaming", which is an active-passive way of aggregating NICs, and not 802.3ad/LACP.

    However, I share the opinion that using LACP is always a good idea as it adds some degree of control to the LAG.




  • 5.  RE: ArubaOS to ArubaOS Link Aggregation, non-LACP "trunk" command

    Posted Jan 07, 2025 02:07 PM

    Thank you. And that is correct - we have old servers (we hope to retire sooner, rather than later) that are using teaming. I'll try it without the lacp mode commands as soon as we have a maintenance window to test, this week, before the full migration.

    Much appreciated.

    -John