1 Reply Latest reply on May 18, 2017 11:39 AM by inbusiness

    40GB adapter with a 56GB port

    eccl1213

      Question out of curiosity.

       

      If we set all of our switch ports to 56GB (we use Mellanox adapters) and someone in the datacenter plugs in a non-Mellanox 40GB adapter, what happens?

       

      Does the port not come up at all or is it smart enough to come up at 40GB or does it come at 56GB but cause all kinds of error cause the adapter doesn't support 56GB?

        • Re: 40GB adapter with a 56GB port
          inbusiness

          Hi!

          I have several HCA's and SX6036G gateway systems.

          Here is some test result.

           

          FDR14 switch port mode + QDR 40Gb HCA -> 40Gb IB link-up

          FDR14 switch port mode + FDR14 56Gb HCA -> 56Gb IB link-up

          ETH 56Gb switch port mode + 56Gb ETH mode with modified firmware -> 56Gb ETH link-up

          ETH 56Gb switch port mode + 40Gb ETH mode with un-modified firmware -> 40Gb ETH link-up

          ETH 56Gb switch port mode + any 40Gb ETH Adapter -> 40Gb ETH link-up

           

          I'm heard Mellanox doesn't limit 3rd party Adapter connection to Mellanox switches.

          But you mest check compatibility about cable, HCA, Ethernet adapter list on MLNX-OS User Manuals.

           

          Best Regard.

          Jaehoon Choi