1 Reply Latest reply on Feb 16, 2016 5:08 AM by ferbs

    ConnectX Pro EN 313-BCCT how to get 40Gbe

    cdeklerk

      iperf gives me max of 18Gb/s with th nic's direct attached

      and even worse 8Gb/s with the sx1012 interconnect

      hw: z800 LnkSta 5GT/s x 8       asus z10pe-d8 intel xeon server LnkSta 8GT/s x 8

      os: 2 x centos6.7

       

      can someone help an ethernet basic skilled user

        • Re: ConnectX Pro EN 313-BCCT how to get 40Gbe
          ferbs

          Hi,

           

          If you card sits on a GEN2 slot you will not be able to reach 40Gb/s, you should make sure it sits on a Gen3 slot on both servers

          "lspci | awk '/Mellanox/ {print $1}' | sudo xargs -i -r lspci -s {} -xxxvvv"

           

          in general for troubleshooting steps you should first start with the below after confirming your hardware is set to support the right speeds :

          Share how much you're getting with multi-thread test (-P 12), what driver, firmware versions you have. and if there any drops reported by our nic on the Receiver ?

           

          Driver and Firmware version  : ethtool -i ethX

          ethtool stats, preferable after the OS came after boot. capture from the receiver : ethtool -S ethX | egrep 'drop|err|sto|paus'