0 Replies Latest reply on Nov 15, 2017 5:56 AM by madhankb

    ConnectX-4 25Gbps link not detected with Arista 7150 switch

    madhankb

      Hi,

       

      I am noticing that when my connectx-4 25Gbps card is connected to the Arista 7150 switch (10Gbps) ports, the link is not getting detected.  

       

      Based on the documents I read, my understanding is that the auto-negotiate should successfully negotiate the link to 10Gbps. 

       

      I also tried to disable auto negotiate and set the port speed to 10Gbps and still it is not working.

       

      The details:

       

      Arista switch:

       

      localhost>show version

      Software image version: 4.12.7.1

      Architecture:           i386

       

      Host:

       

      linux-6cof:~ # cat /etc/SuSE-release

      SUSE Linux Enterprise Server 12 (x86_64)

      VERSION = 12

      PATCHLEVEL = 3

      # This file is deprecated and will be removed in a future service pack or release.

      # Please check /etc/os-release for details about this release.

      linux-6cof:~ # uname -r

      4.4.73-5-default

       

       

      linux-6cof:~ # ethtool eth1

      Settings for eth1:

              Supported ports: [ FIBRE Backplane ]

              Supported link modes:   1000baseKX/Full

                                      10000baseKR/Full

                                      25000baseCR/Full

                                      25000baseKR/Full

                                      25000baseSR/Full

              Supported pause frame use: Symmetric

              Supports auto-negotiation: Yes

              Advertised link modes:  10000baseKR/Full

              Advertised pause frame use: Symmetric

              Advertised auto-negotiation: No

              Speed: Unknown!

              Duplex: Unknown! (255)

              Port: FIBRE

              PHYAD: 0

              Transceiver: internal

              Auto-negotiation: off

              Supports Wake-on: d

              Wake-on: d

              Link detected: no

       

      linux-6cof:~ # modinfo mlx5_core

      filename:       /lib/modules/4.4.73-5-default/kernel/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.ko

      version:        3.0-1

      license:        Dual BSD/GPL

      description:    Mellanox Connect-IB, ConnectX-4 core driver

      author:         Eli Cohen <eli@mellanox.com>