由于交换机端口上的链路较差或无链路、一条路径中缺少ATTO网桥

• ONTAP 9
• FAS/AFF系统
• 光纤连接MetroCluster

• 通过事件日志中调用的适配器、所有节点中缺少一个ATTO网桥的路径：

[Node-102: isp2400_timeout_0: fci.device.quiesce:debug]: Adapter 1d encountered a command timeout on Unknown device Switch1:10.126 (0x00080a00) LUN 0 cdb 0x12 retry: 0 Quiescing the device.
[Node-102: isp2400_asyncd_0: fci.device.login.status:debug]: A login delay has occurred between Fibre Channel adapter 1d and unknown device Switch1:10.126 (0x00080a00), with error subcode 0x703.
[Node-101: isp2400_timeout_0: fci.device.login.failure:error]: A login failure has occurred between Fibre Channel adapter 1d and unknown device Switch1:10.126 (0x00080a00), with error subcode 0x703.
[Node-101: svc_queue_thread: callhome.dsk.redun.fault:error]: Call home for DISK REDUNDANCY FAILED

• 所有节点都从"四路径HA"配置过渡到"多路径HA"配置：

[Node-101: dsa_disc: shelf.config.tompha:info]: System has transitioned to multi-path HA attached storage

• 受影响ATTO网桥的FC端口报告了多个错误：

get FCPortErrors all

; Fibre Channel Error Counts 
; Port | Link Failures | Sync Loss | Signal Loss | Invalid Tx | Invalid CRC
;==========================================================================
  1          1       3        0       0        0
  2        1957   922594816        0      216     14382

• 连接到缺失ATTO网桥的交换机端口也会出现错误：

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
  9:   3.0g   4.2g   0    0    0    0    0    0    0    1    0    0    0    0    0    0    1    0    0
 10:   1.9g   4.1g   0    2   1    0    1    0    0   892    4   0    4    0    0   892    0    0    0

• 交换机端口上SFP的传输功率(Tx)低于 预期范围：

Switch> sfpshow -all

=============
Port 10:
=============

Current:    7.508   mAmps
Voltage:    3304.2  mVolts
RX Power:   -1.5   dBm (706.9uW)
TX Power:   -5.2   dBm (302.0 uW)