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FC Target port reporting link disconnected due to faulty card on Storage end

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Category:
ontap-9
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SAN
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Applies to

  • ONTAP 9.x
  • FC
  • SAN switches

Issue

  • The ONTAP FC port is reporting link disconnected with extended status as Adapter up.

Port extended statu.png

  • A critical alert is received for FC target port error or the link shows disconnected:

port status.png

  • The Rx and Tx power reported on the FC port is very low-

Rx: 0.0 (uWatts)
Tx: 0.0 (uWatts)

  • Verify with Harware Universe to confirm that the SFP in use is supported.
  • The Rx and Tx levels on the affected FC port are displaying as optimal.

Rx, Tx.png

  • The Rx and Tx on the switch port are displaying as optimal.
  • Link break and link up events are reported in EMS logs.

Mon May 20 10:12:18  0700 [node2: fct_tpd_work_thread_0: scsitarget.slifct.linkBreak:error]: Link break detected on Fibre Channel target HBA 1b with event status 1 , topology type 1, status1 0x0, status2 0x0.
Mon May 20 10:12:19  0700 [node2: nvmf_master_0: nvmf.spdk.err:debug]: fc_adm_api.c:2273 port link break: HW port 1 already offline. rc = 2
Mon May 20 10:26:09  0700 [node2: fct_tpd_work_thread_0: scsitarget.hwpfct.linkUp:notice]: Link up on Fibre Channel target adapter 1b.
Mon May 20 10:37:39  0700 [node2: fct_tpd_thread_1: fcp.io.status:debug]: STIO Adapter 1b reinitialization completed successfully. Port configured online.
Mon May 20 10:37:45  0700 [node2: fct_tpd_work_thread_0: scsitarget.slifct.wqeError:debug]: FC port 1b has a WQE processing failure of type SLI_ELS_REQ, command FLOGI, subtype x0, with status of 3 and an extended status x2 for NPIV port 0.

  • Below troubleshooting steps can be performed to isolate the issue.
    • Perform cable teseting along with patch panel if cable has any issues proceed with cable reseat\replacement.
    • Replace SFP on storage FC target port.
    • If issue still persists, replace SFP on switch port.
    • Toggle the port on storage end and see if port state changes.
    • If the issue persists even after replacing cable/patch panel & SFP on either ends :
      • Connect cable from bad port to any unused port on the switch and verify the link status and LED indicators
      • Swap cable from working target port to the bad port and verify the status 
      • Isolate the issue and device to determine the device causing the bad port

 

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