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E-Series iSCSI connection reports 1815/1814/180D errors frequently

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Applies to

  • NetApp E-Series
  • iSCSI

Issue

  • The controller reports below errors:
    • Event type: 1815 ISCSI carrier has been lost
    • Event type: 1814 ISCSI carrier has been detected
    • Event type: 180D Session terminated unexpectedly
  • iscsi-statistics.csv records lots of CRC errors within MAC receive statistics:

NOTE: FCRCE = Frame CRC Error Count

E-Series iSCSI connection reports

  • The error counters under STATE-CAPTURE-DATA -> iscsiStateCapture ->  showIscsiStats(ISCSI_STATISTICS_RAW) indicates that all errors are from Rx (Receiving in):

    ========================================================================
                        ETHERNET PORT STATISTICS - PORT 0
    ========================================================================
      Port Rx Frame CRC Err Count     0xbdef6　

    ========================================================================
                            IP ENDPOINT STATISTICS - PORT 0
    ========================================================================
      IPV4 Received Pdus                0x0
      IPV4 Sent Pdus                    0x0
      IPV4 Reassembly Required          0x0
      IPV4 Fragmentation                0x0
      IPV4 Fragmented Pdus Created      0x0
      IPV4 Tx Byte Count                0x0
      IPV4 Rx Byte Count                0x0
      IPV4 Rx Error Count               0x3eff　

  • But the target port (e0a) shows normal status:

Hostinterface:    iSCSI
HostInterfaceCard(HIC):    Baseboard
Channel:    1
Port:    e0a
Linkstatus:    Connected

 

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