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Path redundancy degraded alerts on ESXi host due to faulty host sfp on switch

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310
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
san
Last Updated:
6/5/2024, 9:17:49 AM

Applies to

  • Ontap 9
  • FC
  • ESXi
  • Brocade SAN Switch

Issue

  • Multiple NetApp LUNs were seeing host connectivity issues along with degraded paths and frequent disconnections of NetApp FC luns.

  • ESXi host reports below alert on VMware side on the vCenter-
This email is to notify you that an alarm has been triggered in your vCenter:
[Warning] Alarm alarm.StorageConnectivityAlarm on Host hostabc.xxx.com
because Path redundancy to storage device naa.600a098xxxxxx46c3f515xxxxxxxx degraded. Path vmhba2:C0:xx:xx0 is down. Affected datastores: xxx-NetApp-xyz..
Alarm name  alarm.StorageConnectivityAlarm
Description alarm.StorageConnectivityAlarm
Target      Host hostabc.xxx.com
Status Warning (previous status: Normal)
Triggered time 04/03/2024 01:27:05 PM
 
Path redundancy to storage device naa.600a098xxxxxx46c3f515xxxxxxxx degraded. Path vmhba2:C0:T8:L142 is down. Affected datastores: xxx-NetApp-xyz. Warning 04/04/2024, 11:12:40 AM   
 

Wed Apr 03 13:02:34 +0200 [NetApp: fct_tpd_thread_5: fcp.io.status:debug]: STIO Adapter:0g, found hung cmd:0xfffff808ed70a770(state=5, flags=0x0, ctio_sent=1/1,RecvExAddr=0x1217d0, OX_ID=0x125, RX_ID=0xffff,SID=0x4105xx, Cmd[2A], req_q_free:3501)
Wed Apr 03 14:41:09 +0200 [NetApp: fct_tpd_thread_4: fcp.io.status:debug]:
STIO Adapter:0h, found hung cmd:0xfffff808ed1d8b38(state=5, flags=0x0, ctio_sent=1/1,RecvExAddr=0x11d570, OX_ID=0x735, RX_ID=0xffff,SID=0x4105xx, Cmd[2A], req_q_free:1321)

 NOTE: state=5: DATAOUT_WAIT - This indicates that the FC target is waiting for something to come back from the host after accepting the write request; however, nothing came back within the expected timeout value.”

  • These STIO events were coming from two specific SIDs.
  • The host connected port on the SAN switch has the status of Laser_FLT, which indicates faulty sfp.

Index Slot Port Address Media  Speed        State    Proto
============================================================
5    1   5   701400   id    N16       Laser_Flt   FC

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