Request for ethtool dump - tracking the missing 40000baseLR4!

Discussion in 'Networking' started by mattaw, Oct 27, 2018.

  1. mattaw

    mattaw Member

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    From it's specifications it looks like the dual qsfp connectx-3 has 3W qsfp support including LR4. From the firmware release notes 40gb support:
    QSFP-40G-SR-BD
    MC2210511-LR4

    Some internet posts of ethtool run on this show supported link types of 40000baseLR4/Full. 56 GbE over a ConnectX-3 VPI adapter | Mellanox Interconnect Community

    My card, cross flashed HP, 2.42.5000, doesn't show it in ethtool.

    Bad flash or firmware update or only genuine cards have it?

    If you are running a connect x3 qsfp can you post your firmware version and ethtool dump? Also any high power qsfp that worked (univ, bd, lr4...)

    Thanks



    Can someone post an ethtool <connectx-3> in this thread, along with firmware version and actual card brand?
     
    #1
    Last edited: Oct 27, 2018
  2. fohdeesha

    fohdeesha Kaini Industries

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    are you looking for 40gbase-LR4 or 40gbase-KR4? KR4 is an extremely limited backplane PHY protocol, like for 2 feet of pcb traces or less, usually used to get 40gb over a backplane connector in a chassis, nothing to do with LR4
     
    #2
  3. mattaw

    mattaw Member

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    LR4, definitely. I made a mistake in the title. It won't let me report my own thread for a mod to change and it doesn't look like I can edit it anymore either. Thoughts?

    [I got curious after our last thread and I enjoy fixing things, messing with firmware and in extreme cases breaking out the soldering iron.]
     
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  4. lambda

    lambda New Member

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    Just in case you want to try some inexpensive LR4 optics, I found this on eBay.
    BRAND NEW ! KAIAM QSFP + - LR4 40GBASE XQX2100 | eBay
     
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  5. mattaw

    mattaw Member

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    They are nice. I wondered if the LR4L would be lower power consumption? About the same price :
    Arista QSFP-40G-LRL4-US (US Critical) 40GBase-IR4 QSFP+

    Before I bought more shiny things, I was hoping someone could give me an answer on whether that the higher power optics would work in a crossflashed Connectx-3 card. I have another thread trying to get some Fiberstore BiDi's working which I failed at. The BiDi's also get very hot, the server needs a lot of airflow to support them (900 lfpm)
     
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  6. mattaw

    mattaw Member

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    So the FS BiDi's didn't work (bear in mind they were purchased off eBay so may not have been good). I currently have 2x Arista programmed QSFP-40G-LRL4's installed in the card and they are working fine over about 22m of OM1! I guess the LR just pushes enough juice through the fiber to work. At some point I should pull some SMF to see if I can get the power down.
     
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