Dear Pavan, Yes, our cluster is equipped with the Mellanox FDR IB (56 Gb/s): %ibv_devinfo hca_id: mlx4_0 transport: InfiniBand (0) fw_ver: 2.30.3200 node_guid: 0002:c903:0034:5980 sys_image_guid: 0002:c903:0034:5983 vendor_id: 0x02c9 vendor_part_id: 4099 hw_ver: 0x0 board_id: HP_0230240019 phys_port_cnt: 2 port: 1 state: PORT_ACTIVE (4) max_mtu: 4096 (5) active_mtu: 4096 (5) sm_lid: 1 port_lid: 202 port_lmc: 0x00 link_layer: InfiniBand port: 2 state: PORT_DOWN (1) max_mtu: 4096 (5) active_mtu: 4096 (5) sm_lid: 0 port_lid: 0 port_lmc: 0x00 link_layer: InfiniBand With best regards, Victor. P.s. I am sorry for a mess with message title. Could you please guide me how to properly reply a message posted on the MPICH mailing list. I have tried to use In-Reply-To tag without any success. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss