lsattr -El fscsi. Look for the attach parameter

root@aix:/ # lsattr -El fscsi1
attach none How this adapter is CONNECTED False
dyntrk no Dynamic Tracking of FC Devices True
fc_err_recov delayed_fail FC Fabric Event Error RECOVERY Policy True
scsi_id Adapter SCSI ID False
sw_fc_class 3 FC Class for Fabric True
root@aix:/ # lsattr -El fscsi3
attach al How this adapter is CONNECTED False
dyntrk no Dynamic Tracking of FC Devices True
fc_err_recov delayed_fail FC Fabric Event Error RECOVERY Policy True
scsi_id 0x1 Adapter SCSI ID False
sw_fc_class 3 FC Class for Fabric True

The adapter fcs2 I know that is connected

root@aix:/ # lsattr -El fscsi2
attach switch How this adapter is CONNECTED False
dyntrk no Dynamic Tracking of FC Devices True
fc_err_recov delayed_fail FC Fabric Event Error RECOVERY Policy True
scsi_id 0x2bd00 Adapter SCSI ID False
sw_fc_class 3 FC Class for Fabric True

After plugging the fibre, I ran cfgmgr to recognize the hardware

root@aix:/ # cfgmgr

And runnning again lsattr -El fscsi I see that the attach parameter changed to switch

root@aix:/ # lsattr -El fscsi1
attach switch How this adapter is CONNECTED False
dyntrk no Dynamic Tracking of FC Devices True
fc_err_recov delayed_fail FC Fabric Event Error RECOVERY Policy True
scsi_id 0x14fdc0 Adapter SCSI ID False
sw_fc_class 3 FC Class for Fabric True
root@aix:/ # lsattr -El fscsi3
attach al How this adapter is CONNECTED False
dyntrk no Dynamic Tracking of FC Devices True
fc_err_recov delayed_fail FC Fabric Event Error RECOVERY Policy True
scsi_id 0x1 Adapter SCSI ID False
sw_fc_class 3 FC Class for Fabric True

root@aix:/ # fcstat fcs1

FIBRE CHANNEL STATISTICS REPORT: fcs1

Device Type: 4Gb FC PCI Express Adapter (df1000fe) (adapter/pciex/df1000fe)
Serial Number: 1C91308281
Option ROM Version: 02E8277F
ZA: Z1F2.70A5
World Wide Node Name: 0x20000000C986EF2F
World Wide Port Name: 0x10000000C986EF2F

FC-4 TYPES:
Supported: 0x0000012000000000000000000000000000000000000000000000000000000000
Active: 0x0000010000000000000000000000000000000000000000000000000000000000
Class of Service: 3
Port Speed (supported): 4 GBIT
Port Speed (running): 4 GBIT
Port FC ID: 0x28af80
Port Type: Fabric
Attention Type: Link Up
Topology: Point to Point or Fabric

Seconds Since Last Reset: 11519187

Transmit Statistics Receive Statistics
——————- ——————
Frames: 4294967295 4294967295
Words: 1099511627520 1099511627520

LIP Count: 0
NOS Count: 0
Error Frames: 0
Dumped Frames: 0
Link Failure Count: 1
Loss of Sync Count: 1
Loss of Signal: 0
Primitive Seq Protocol Error Count: 0
Invalid Tx Word Count: 3
Invalid CRC Count: 0

IP over FC Adapter Driver Information
No DMA Resource Count: 0
No Adapter Elements Count: 0

FC SCSI Adapter Driver Information
No DMA Resource Count: 0
No Adapter Elements Count: 0
No Command Resource Count: 0

IP over FC Traffic Statistics
Input Requests: 0
Output Requests: 0
Control Requests: 0
Input Bytes: 0
Output Bytes: 0

FC SCSI Traffic Statistics
Input Requests: 614967916
Output Requests: 1227673574
Control Requests: 1180997
Input Bytes: 160727856996239
Output Bytes: 321763800652003

• AIX