RDMA
[root@centos7 infiniband]# ibv_devices device node GUID ------ ---------------- rxe0 b20875fffe5fb85e rxe1 46a191fffea49c0c [root@centos7 infiniband]# ibv_devinfo -d rxe0 -v hca_id: rxe0 transport: InfiniBand (0) fw_ver: 0.0.0 node_guid: b208:75ff:fe5f:b85e sys_image_guid: 0000:0000:0000:0000 vendor_id: 0x0000 vendor_part_id: 0 hw_ver: 0x0 phys_port_cnt: 1 max_mr_size: 0xffffffffffffffff page_size_cap: 0xfffff000 max_qp: 65536 max_qp_wr: 16384 device_cap_flags: 0x00203c76 BAD_PKEY_CNTR BAD_QKEY_CNTR AUTO_PATH_MIG CHANGE_PHY_PORT UD_AV_PORT_ENFORCE PORT_ACTIVE_EVENT SYS_IMAGE_GUID RC_RNR_NAK_GEN SRQ_RESIZE MEM_MGT_EXTENSIONS max_sge: 32 max_sge_rd: 32 max_cq: 16384 max_cqe: 32767 max_mr: 2048 max_pd: 32764 max_qp_rd_atom: 128 max_ee_rd_atom: 0 max_res_rd_atom: 258048 max_qp_init_rd_atom: 128 max_ee_init_rd_atom: 0 atomic_cap: ATOMIC_HCA (1) max_ee: 0 max_rdd: 0 max_mw: 0 max_raw_ipv6_qp: 0 max_raw_ethy_qp: 0 max_mcast_grp: 8192 max_mcast_qp_attach: 56 max_total_mcast_qp_attach: 458752 max_ah: 100 max_fmr: 0 max_srq: 960 max_srq_wr: 16384 max_srq_sge: 27 max_pkeys: 64 local_ca_ack_delay: 15 general_odp_caps: rc_odp_caps: NO SUPPORT uc_odp_caps: NO SUPPORT ud_odp_caps: NO SUPPORT completion_timestamp_mask not supported core clock not supported device_cap_flags_ex: 0x0 tso_caps: max_tso: 0 rss_caps: max_rwq_indirection_tables: 0 max_rwq_indirection_table_size: 0 rx_hash_function: 0x0 rx_hash_fields_mask: 0x0 max_wq_type_rq: 0 packet_pacing_caps: qp_rate_limit_min: 0kbps qp_rate_limit_max: 0kbps tag matching not supported port: 1 state: PORT_ACTIVE (4) max_mtu: 4096 (5) active_mtu: 1024 (3) sm_lid: 0 port_lid: 0 port_lmc: 0x00 link_layer: Ethernet max_msg_sz: 0x800000 port_cap_flags: 0x00890000 port_cap_flags2: 0x0000 max_vl_num: 1 (1) bad_pkey_cntr: 0x0 qkey_viol_cntr: 0x0 sm_sl: 0 pkey_tbl_len: 64 gid_tbl_len: 1024 subnet_timeout: 0 init_type_reply: 0 active_width: 1X (1) active_speed: 2.5 Gbps (1) phys_state: LINK_UP (5) GID[ 0]: fe80:0000:0000:0000:b208:75ff:fe5f:b85e GID[ 1]: 0000:0000:0000:0000:0000:ffff:0a0b:0bfb [root@centos7 infiniband]#
这个Soft-RoCE设备有一个端口，它共有2个GID：
[root@centos7 infiniband]# ip a sh enp125s0f3 6: enp125s0f3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether b0:08:75:5f:b8:5e brd ff:ff:ff:ff:ff:ff inet 10.11.11.251/24 scope global enp125s0f3 valid_lft forever preferred_lft forever [root@centos7 infiniband]#
