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Insurmountable compatibility MacSec IEEE 802.1AE problems AOS Switch to AOS-CX Switch

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  • 1.  Insurmountable compatibility MacSec IEEE 802.1AE problems AOS Switch to AOS-CX Switch

    Posted Jan 18, 2024 06:27 AM

    Please advice, anyone with working switches ?



    ------------------------------
    Steinar
    ------------------------------


  • 2.  RE: Insurmountable compatibility MacSec IEEE 802.1AE problems AOS Switch to AOS-CX Switch
    Best Answer

    Posted Jan 22, 2024 11:07 AM

    From CX manual:

    Specifies the CKN (Connectivity Association Key Name). Range: 1 to 64 hexadecimal characters

    Specifies the CAK (Connectivity Association Key) in plaintext. Range: 1 to 64 hexadecimal characters.

    AOS:

    Enter the CKN as a string of hexadecimal digits up to 32 characters long

    Enter the CAK as a string of hexadecimal digits up to 64 characters long

    This mean that for the AOS the CAK limitation is 32 byte ascii/characters 

    • Bee aware some other setting smay be accepted, during input.

    ie, a 34 characters ascii CAK will be silent truncated....to 32 characters

    ie.:

    12345678901234567890123456789012

    and

    1234567890123456789012345678901234

    will both work, in AOS >< CX MacSec (on AOS side)

    as

    12345678901234567890123456789012

    on CX side will

    • So: stay with CKN/CAK 32/32 ascii/characters. (digits and letters)


    ------------------------------
    Steinar
    ------------------------------



  • 3.  RE: Insurmountable compatibility MacSec IEEE 802.1AE problems AOS Switch to AOS-CX Switch

    Posted 18 days ago

    Hi Steinar,

    I had the same problem.

    Adjusting the key server priority solved it for me.

    The AOS switch must be the key server.

    In my case, the AOS had a priority of 16 (show port-access mka status)

    (The default prio of the AOS-CX is 0)

    So I gave the AOS-CX the maximum priority of 255 (key-server-priority 255 (on the mka policy context))

    Best regards

    Robin