How to know the remote storage port WWPN to which the system is connected?

Solution Verified - Updated

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Fibre Channel SAN storage

Issue

  • How to know the storage ports the host is currently logged into?

Resolution

  • The sysfs contains references to the storage ports the host is currently logged into
grep -vH "zZzZ" /sys/class/fc_remote_ports/rport*/port_name

/sys/class/fc_remote_ports/rport-0:0-0/port_name:0x5005076802206687

/sys/class/fc_remote_ports/rport-0:0-1/port_name:0x5005076802106686

/sys/class/fc_remote_ports/rport-0:0-2/port_name:0x500507680215b5ea

/sys/class/fc_remote_ports/rport-0:0-3/port_name:0x500507680215b5e9

/sys/class/fc_remote_ports/rport-1:0-0/port_name:0x5005076802106687

/sys/class/fc_remote_ports/rport-1:0-1/port_name:0x5005076802206686

Alternatively you can use the following command from the sysfsutils package:

/usr/bin/systool -c fc_remote_ports -v

:

.

Class Device = "0-3"

Class Device path = "/sys/devices/pci0000:00/0000:00:07.0/0000:0e:00.0/host1/rport-1:0-3/fc_remote_ports/rport-1:0-3"

dev_loss_tmo        = "30"

fast_io_fail_tmo    = "off"

maxframe_size       = "2048 bytes"

node_name           = "0x500507608b87de9a"

port_id             = "0x010700"

port_name           = "0x500507680215b5e9"
port_state          = "Online"

roles               = "FCP Initiator"

scsi_target_id      = "-1"

supported_classes   = "Class 3"

:

.

  • From the above output the remote storage ports are 
1. 0x5005076802206687 
2. 0x5005076802106686
3. 0x500507680215b5ea 
4. 0x500507680215b5e9
5. 0x5005076802106687
6. 0x5005076802206686

Additional information can be found within How do I find the FC ID (WWN) of a disk/LUN on Red Hat Enterprise Linux? which covers identifying the full set of WWN -- hba, switch, storage port, and lun -- along a path to a device.

Diagnostic Steps

What is rport and how to gather more information about it?

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