Chapter 16. Configuring NVMe over fabrics using NVMe/FC The Non-volatile Memory ExpressTM (NVMeTM) over Fibre Channel (NVMeTM/FC) transport is fully supported in host mode when used with certain Broadcom Emulex and Marvell Qlogic Fibre Channel adapters. 16.1. Configuring the NVMe host for Broadcom adapters You can configure a Non-volatile Memory ExpressTM (NVMeTM) host for Broadcom adapters client by using the NVMe management command-line interface ( nvme-cli ) utility. Procedure Install the nvme-cli utility: This creates the hostnqn file in the /etc/nvme/ directory. The hostnqn file identifies the NVMe host. Find the World Wide Node Name (WWNN) and World Wide Port Name (WWPN) identifiers of the local and remote ports: Using these host-traddr and traddr values, find the subsystem NVMe Qualified Name (NQN): Replace nn-0x204600a098cbcac6:pn-0x204700a098cbcac6 with the traddr . Replace nn-0x20000090fae0b5f5:pn-0x10000090fae0b5f5 with the host-traddr . Connect to the NVMe controller using the nvme-cli : Note If you see the keep-alive timer (5 seconds) expired! error when a connection time exceeds the default keep-alive timeout value, increase it using the -k option. For example, you can use, -k 7 . Here, Replace nn-0x204600a098cbcac6:pn-0x204700a098cbcac6 with the traddr . Replace nn-0x20000090fae0b5f5:pn-0x10000090fae0b5f5 with the host-traddr . Replace nqn.1992-08.com.netapp:sn.e18bfca87d5e11e98c0800a098cbcac6:subsystem.st14_nvme_ss_1_1 with the subnqn . Replace 5 with the keep-alive timeout value in seconds. Verification List the NVMe devices that are currently connected: Additional resources nvme(1) man page on your system 16.2. Configuring the NVMe host for QLogic adapters You can configure a Non-volatile Memory ExpressTM (NVMeTM) host for Qlogic adapters client by using the NVMe management command-line interface ( nvme-cli ) utility. Procedure Install the nvme-cli utility: This creates the hostnqn file in the /etc/nvme/ directory. The hostnqn file identifies the NVMe host. Reload the qla2xxx module: Find the World Wide Node Name (WWNN) and World Wide Port Name (WWPN) identifiers of the local and remote ports: Using these host-traddr and traddr values, find the subsystem NVMe Qualified Name (NQN): Replace nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6 with the traddr . Replace nn-0x20000024ff19bb62:pn-0x21000024ff19bb62 with the host-traddr . Connect to the NVMe controller using the nvme-cli tool: Note If you see the keep-alive timer (5 seconds) expired! error when a connection time exceeds the default keep-alive timeout value, increase it using the -k option. For example, you can use, -k 7 . Here, Replace nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6 with the traddr . Replace nn-0x20000024ff19bb62:pn-0x21000024ff19bb62 with the host-traddr . Replace nqn.1992-08.com.netapp:sn.c9ecc9187b1111e98c0800a098cbcac6:subsystem.vs_nvme_multipath_1_subsystem_468 with the subnqn . Replace 5 with the keep-live timeout value in seconds. Verification List the NVMe devices that are currently connected: Additional resources nvme(1) man page on your system 16.3. steps Enabling multipathing on NVMe devices

Commands:
yum install nvme-cli
cat /sys/class/scsi_host/host*/nvme_info NVME Host Enabled XRI Dist lpfc0 Total 6144 IO 5894 ELS 250 NVME LPORT lpfc0 WWPN x10000090fae0b5f5 WWNN x20000090fae0b5f5 DID x010f00 ONLINE NVME RPORT WWPN x204700a098cbcac6 WWNN x204600a098cbcac6 DID x01050e TARGET DISCSRVC ONLINE NVME Statistics LS: Xmt 000000000e Cmpl 000000000e Abort 00000000 LS XMIT: Err 00000000 CMPL: xb 00000000 Err 00000000 Total FCP Cmpl 00000000000008ea Issue 00000000000008ec OutIO 0000000000000002 abort 00000000 noxri 00000000 nondlp 00000000 qdepth 00000000 wqerr 00000000 err 00000000 FCP CMPL: xb 00000000 Err 00000000
nvme discover --transport fc \ --traddr nn-0x204600a098cbcac6:pn-0x204700a098cbcac6 \ --host-traddr nn-0x20000090fae0b5f5:pn-0x10000090fae0b5f5 Discovery Log Number of Records 2, Generation counter 49530 =====Discovery Log Entry 0====== trtype: fc adrfam: fibre-channel subtype: nvme subsystem treq: not specified portid: 0 trsvcid: none subnqn: nqn.1992-08.com.netapp:sn.e18bfca87d5e11e98c0800a098cbcac6:subsystem.st14_nvme_ss_1_1 traddr: nn-0x204600a098cbcac6:pn-0x204700a098cbcac6
nvme connect --transport fc \ --traddr nn-0x204600a098cbcac6:pn-0x204700a098cbcac6 \ --host-traddr nn-0x20000090fae0b5f5:pn-0x10000090fae0b5f5 \ -n nqn.1992-08.com.netapp:sn.e18bfca87d5e11e98c0800a098cbcac6:subsystem.st14_nvme_ss_1_1 \ -k 5
nvme list Node SN Model Namespace Usage Format FW Rev ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- -------- /dev/nvme0n1 80BgLFM7xMJbAAAAAAAC NetApp ONTAP Controller 1 107.37 GB / 107.37 GB 4 KiB + 0 B FFFFFFFF lsblk |grep nvme nvme0n1 259:0 0 100G 0 disk
yum install nvme-cli
modprobe -r qla2xxx modprobe qla2xxx
dmesg |grep traddr [ 6.139862] qla2xxx [0000:04:00.0]-ffff:0: register_localport: host-traddr=nn-0x20000024ff19bb62:pn-0x21000024ff19bb62 on portID:10700 [ 6.241762] qla2xxx [0000:04:00.0]-2102:0: qla_nvme_register_remote: traddr=nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6 PortID:01050d
nvme discover --transport fc \ --traddr nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6 \ --host-traddr nn-0x20000024ff19bb62:pn-0x21000024ff19bb62 Discovery Log Number of Records 2, Generation counter 49530 =====Discovery Log Entry 0====== trtype: fc adrfam: fibre-channel subtype: nvme subsystem treq: not specified portid: 0 trsvcid: none subnqn: nqn.1992-08.com.netapp:sn.c9ecc9187b1111e98c0800a098cbcac6:subsystem.vs_nvme_multipath_1_subsystem_468 traddr: nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6
nvme connect --transport fc \ --traddr nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6 \ --host-traddr nn-0x20000024ff19bb62:pn-0x21000024ff19bb62 \ -n nqn.1992-08.com.netapp:sn.c9ecc9187b1111e98c0800a098cbcac6:subsystem.vs_nvme_multipath_1_subsystem_468 \ -k 5
nvme list Node SN Model Namespace Usage Format FW Rev ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- -------- /dev/nvme0n1 80BgLFM7xMJbAAAAAAAC NetApp ONTAP Controller 1 107.37 GB / 107.37 GB 4 KiB + 0 B FFFFFFFF lsblk |grep nvme nvme0n1 259:0 0 100G 0 disk