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5945 with 100G BiDi Transceiver: No Link

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  • 1.  5945 with 100G BiDi Transceiver: No Link

    Posted Nov 06, 2023 04:54 PM

    Hi!

    I just put some QSFP28 BiDi (JQ344A) transceivers in my 5945 switches (JQ074A, R6555). I get no link (Line protocol state: DOWN). Neither switch-to-switch nor switch-to-server works.

    • The transceivers are supported on that HW and SW version.
    • Transceiver diagnostics shows good signal on all 4 lanes.
    • The switchports work ok, if I use DAC cables. Both switch-to-switch and switch-to-server.
    • The transceivers are ok, I tested them in the server NICs (P25960-B21, connection from server to server).

    I suspect some kind of issue with the autonegotiation. The manual however says, that a connection between HGE ports of two JQ074A should work with default settings.

    Anyone can tell me what I'm missing?



  • 2.  RE: 5945 with 100G BiDi Transceiver: No Link

    Posted Oct 31, 2024 10:54 AM

    Sorry for resurrecting an older post, but we had the same problem with our 5945s (JQ076A) and this transceiver (JQ344A).

    Apparently they are not actually supported in R6555, or at least that's what our consulting partner told us after talking to HPE support.

    We ended up upgrading to the newest R6715 firmware and the problem went away.


    Original Message


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