> greina7:~/src/libfabric ((tags/v1.4.1^0))$ ibv_devinfo -v > hca_id: mlx5_0 > port: 1 > state: PORT_ACTIVE (4) > max_mtu: 4096 (5) > active_mtu: 4096 (5) Can you run 'rping' on the IP address for this port? I don't know the parameters for rping off the top of my head...