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Host lost access to LUNs due to faulty SFP

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Applies to

  • ONTAP 9
  • SAN
  • FCP

Issue

  • ONTAP EMS log reports event with fcp.io.status STIO Adapter IO WQE failure
  • Host loses access to LUNs intermittently.
  • SAN paths keep flapping 
  • Switch errdump:

2020/03/03-07:58:27, [C3-1014], 340, CHASSIS, WARNING, Brocade6505,  Link Reset on Port S0,P6(3) vc_no=0 crd(s)lost=6 auto trigger.

  • switch porterrshow:

porterrshow
          frames      enc    crc    crc    too    too    bad    enc   disc   link   loss   loss   frjt   fbsy  c3timeout    pcs    uncor
       tx     rx      in    err    g_eof  shrt   long   eof     out   c3    fail    sync   sig                  tx    rx     err    err
 
  6:    3.6k   9.8k   0      3.6k   3.5k   0      0     60      0    228      0      0      0      0      0    223      0    233.9k   0

  • sfpshow 6

RX Power:    -6.1    dBm (247.2uW)
TX Power:    -2.9    dBm (510.5 uW)

 

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