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Understand LACP

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  • 1.  Understand LACP

    Posted Sep 12, 2022 08:51 AM
    show lacp
    LACP

    LACP Trunk Port LACP Admin Oper
    Port Enabled Group Status Partner Status Key Key
    ----- ------- ------- ------- ------- ------- ------ ------
    1/10 Active Trk1 Up Yes Success 0 532
    1/12 Active Trk2 Blocked Yes Failure 0 533
    1/51 Active Trk3 Down No Success 0 534
    1/52 Active Trk4 Down No Success 0 535
    2/10 Active Trk1 Blocked Yes Failure 0 532
    2/12 Active Trk2 Blocked Yes Failure 0 533
    2/51 Active Trk3 Down No Success 0 534
    2/52 Active Trk4 Down No Success 0 535


    Except 1/10 why 1/12 2/10 2/12 showing blocked


  • 2.  RE: Understand LACP

    MVP GURU
    Posted Sep 12, 2022 10:27 AM
    Hello,

    Given that (Port Trunk) Trk1 is made of 1/10 + 2/10 and Trk2 is made of 1/12 + 2/12, the first question is: where are connected those Trk1 and Trk2 logical interfaces? in other terms where are connected 1/10 + 2/10 (both physical members of Trk1) and 1/12 + 2/12 (both physical members of Trk2), respectively? What peer devices are involved?

    Can you post the outputs of:

    show trunks ethernet 1/10,2/10
    show trunks ethernet 1/12,2/12

    and the (sanitized) outputs of:

    show lldp info remote-device ethernet 1/10,2/10
    show lldp info remote-device ethernet 1/12,2/12

    The above to having a minimum understanding of involved connections.

    Here we imply that 1/10 and 2/10 (exactly as 1/12 and 2/12) are qualified to form a LACP port trunk respecting restrictions and requirements imposed by a LACP links aggregation deployment.


  • 3.  RE: Understand LACP

    Posted Sep 12, 2022 11:01 AM
    Both 10 and 12 ports are connected to upstream 2 FortiGate devices  Port10 & 12 which are aggregated as LAN port
    Load Balancing Method: L3-based (default)

    Port | Name Type | Group Type
    ------ + -------------------------------- ---------- + ----- --------
    1/10 | 100/1000T | Trk1 LACP
    2/10 | 100/1000T | Trk1 LACP

    Load Balancing Method: L3-based (default)

    Port | Name Type | Group Type
    ------ + -------------------------------- ---------- + ----- --------
    1/12 | 100/1000T | Trk2 LACP
    2/12 | 100/1000T | Trk2 LACP

    show lldp info remote-device ethernet 1/10,2/10

    LLDP Remote Device Information Detail


    show lldp info remote-device ethernet 1/12,2/12

    LLDP Remote Device Information Detail

    If I enter

    show lldp info remote-device It's shows downstream Synergy enclosure.

    LLDP Remote Devices Information

    LocalPort | ChassisId PortId PortDescr SysName
    --------- + ------------------ ------------------ --------- ------------------
    1/2 | 222 Enclos...
    1/49 | 16bf00-d00000 ethernet0/0/1:1 Ethern... SYNFrame01-LE-S...
    2/2 | 122 Enclos...
    2/49 | 16bf00-d00000 ethernet1/0/1:1 Ethern... SYNFrame01-LE-S...