Chapter 16. Configuring NVMe over fabrics using NVMe/FC

Procedure

1. Install the nvme-cli utility:

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   # yum install nvme-cli

   This creates the hostnqn file in the /etc/nvme/ directory. The hostnqn file identifies the NVMe host.

2. Find the World Wide Node Name (WWNN) and World Wide Port Name (WWPN) identifiers of the local and remote ports:

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   # 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

   Using these host-traddr and traddr values, find the subsystem NVMe Qualified Name (NQN):

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   # 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

   Replace nn-0x204600a098cbcac6:pn-0x204700a098cbcac6 with the traddr.

   Replace nn-0x20000090fae0b5f5:pn-0x10000090fae0b5f5 with the host-traddr.

3. Connect to the NVMe controller using the nvme-cli:

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   # 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

   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.

Procedure

1. Install the nvme-cli utility:

   Copy to Clipboard Toggle word wrap

   # yum install nvme-cli

   This creates the hostnqn file in the /etc/nvme/ directory. The hostnqn file identifies the NVMe host.

2. Reload the qla2xxx module:

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   # modprobe -r qla2xxx
   # modprobe qla2xxx

3. Find the World Wide Node Name (WWNN) and World Wide Port Name (WWPN) identifiers of the local and remote ports:

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   # 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

   Using these host-traddr and traddr values, find the subsystem NVMe Qualified Name (NQN):

   Copy to Clipboard Toggle word wrap

   # 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

   Replace nn-0x203b00a098cbcac6:pn-0x203d00a098cbcac6 with the traddr.

   Replace nn-0x20000024ff19bb62:pn-0x21000024ff19bb62 with the host-traddr.

4. Connect to the NVMe controller using the nvme-cli tool:

   Copy to Clipboard Toggle word wrap

   # 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

   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.