E系列iSCSI连接频繁报告1815/1814/180d错误

• NetApp E 系列
• iSCSI

• 控制器报告以下错误：
  • 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 在MAC receive statistics 中记录了大量CRC错误  ：

注：FCRCE =帧CRC错误计数

• STATE-CAPTURE-DATA -> iscsiStateCapture ->  showIscsiStats(ISCSI_STATISTICS_RAW) 下的错误计数器 指示所有错误均来自Rx (接收 )：

  ========================================================================
           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　

    
• 但目标端口(e0a)显示正常状态：

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