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25G QSFP28 Compatibility with 8320 and 8400

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  • 1.  25G QSFP28 Compatibility with 8320 and 8400

    Posted Jul 11, 2018 03:32 AM

    Hi,
    I would like to check if we use 40G QSFP+, can it work with storage server that is using 25G QSFP28? Can the transceiver go down the speed to 25G?

     

    Thanks.

     



  • 2.  RE: 25G QSFP28 Compatibility with 8320 and 8400
    Best Answer

    EMPLOYEE
    Posted Jul 11, 2018 05:48 PM

    Hi MiniMe

    No, 25Gbps is not supported yet. 

    Regards, Ruben.-



  • 3.  RE: 25G QSFP28 Compatibility with 8320 and 8400

    EMPLOYEE
    Posted Jul 16, 2018 05:03 PM

    No, the 40G Transceivers used in the 8400/8320 are single speed only. 

    If used in another QSFP+ or QSFP28 port, only if that QSFP28 port is designed to also support 40G speeds will the 40G Xcvrs work. 

    The 8400 100G QSFP28 ports on the JL366A Aruba 8400X 6p 40G/100G QSFP28 Adv Module can operate with a 40G Aruba Xcvr inserted (JH231A, JH232A, JH233A, JL308A and the 40G DACs JH234A, JH235A, JH236A). 

    See the "ArubaOS-Switch and ArubaOS-CX Transceiver Guide" for more details and compatibility information. (make sure the guide you're looking at has "ArubaOS-CX" in the title -- the latest edition as of July, 2018 is Edition 4. 



  • 4.  RE: 25G QSFP28 Compatibility with 8320 and 8400

    Posted Jul 16, 2018 09:04 PM

    Thank you, I would go for the 59xx series then for compatibility with 25G.



  • 5.  RE: 25G QSFP28 Compatibility with 8320 and 8400

    MVP GURU
    Posted Jul 17, 2018 08:32 AM

    Hello all, just for reference - as of today July, 17th 2018 May, 2019 - the latest ArubaOS-Switch and ArubaOS-CX Transceiver Guide available on HPE Support Portal is this one of March, 28th 2018 (edition 4) January, 9th 2019 (edition 6).

     

    Edit: the link's target document were updated by Aruba which changed Edition 4-->6, I updated the reference.