Link break detected on Fibre Channel target HBA due to faulty cable

Last updated

Nov 4, 2024
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Views:: 3,300

Visibility:: Public

Votes:: 1

Category:: fas-systems

Specialty:: HW

Last Updated:: 11/4/2024, 8:29:22 PM

Applies to

ONTAP 9
FCP

Issue

FC target port link - unstable/down.

Below events are logged in EMS on NetApp:

[?] Wed Oct 14 09:22:49 MDT [host1: fct_tpd_work_thread_0: scsitarget.slifct.linkBreak:error]: Link break detected on Fibre Channel target HBA 4c with event status 1 , topology type 1, status1 0x0, status2 0x0.

[?] Wed Oct 14 09:22:50 MDT [host1: fct_tpd_work_thread_0: scsitarget.hwpfct.linkUp:notice]: Link up on Fibre Channel target adapter 4c.

Tue Mar 05 15:19:28 0530 [NetApp: fct_tpd_work_thread_0: scsitarget.slifct.wqeError:debug]: FC port 3a has a WQE processing failure of type SLI_ELS_REQ, command PLOGI, subtype x0, with status of 3 and an extended status x4 for NPIV port 0. 

Tue Mar 05 15:19:29 0530 [NetApp: fct_tpd_work_thread_0: scsitarget.slifct.wqeError:debug]: FC port 3a has a WQE processing failure of type SLI_ELS_REQ, command PLOGI, subtype x0, with status of 3 and an extended status x1a for NPIV port 0.

Tue Mar 05 15:26:48 0530 [NetApp: fct_tpd_work_thread_0: scsitarget.slifct.linkBreak:error]: Link break detected on Fibre Channel target HBA 3a with event status 1 , topology type 1, status1 0x0, status2 0x0. 

Tue Mar 05 15:26:59 0530 [NetApp: fct_tpd_work_thread_0: scsitarget.slifct.wqeError:debug]: FC port 3a has a WQE processing failure of type SLI_ELS_REQ, command PLOGI, subtype x0, with status of 3 and an extended status x1a for NPIV port 0."

Below steps can be followed to isolate the issue :
- Check the controller port status, replace SFP if Tx signal power is low.
- Check the SFP status of connected switch port, replace the SFP if switch port Tx power is low.
- Replace FC cable if SFP Tx power is normal for both FC end side, but SFP Rx power is low for any side.
- If patch panel involved, troubleshoot link components.
- If there is low Rx signal at both ends, check for patch panels in between and try different port for testing purpose

Example:
cluster1::> fcp adapter show -node host1 -adapter 4c -instance (network fcp adapter show)

Node: host1 Adapter: 4c Description: Fibre Channel Target Adapter 4c (Emulex LPe16000 (LPe16004), rev. 13, 16G) Physical Protocol: fibre-channel Maximum Speed: 16 Administrative Status: up Operational Status: online Extended Status: ADAPTER UP Host Port Address: b10140 Firmware Revision: 11.2.219.4 Data Link Rate (Gbit): 16 Fabric Established: true Fabric Name: xx:xx:xx:xx:xx:xx:xx:xx Connection Established: ptp Is Connection Established: true Mediatype: ptp Configured Speed: auto Adapter WWNN: aa:aa:aa:aa:aa:aa:aa:aa Adapter WWPN: bb:bb:bb:bb:bb:bb:bb:bb Switch Port: switch1:1/88 Form Factor Of Transceiver: SFP Vendor Name Of Transceiver: EMULEX Part Number Of Transceiver: AFBR-57F5MZ-ELX Revision Of Transceiver: Serial Number Of Transceiver: AC1544J02X7 FC Capabilities Of Transceiver: 4,8,16 (Gbit/sec) Vendor OUI Of Transceiver: 00:17:6a Wavelength In Nanometers: 850 Date Code Of Transceiver: 15:10:26 Validity Of Transceiver: true Connector Used: LC Encoding Used: 64B66B Is Internally Calibrated: true Received Optical Power: 56.2 (uWatts) Is Received Power In Range: true SFP Transmitted Optical Power: 610.0 (uWatts) Is Xmit Power In Range: true