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由于存储端SFP出现故障、在连接到Brocade交换机的光纤通道目标上检测到链路中断

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适用场景

  • ONTAP 9
  • FCP
  • Brocade交换机

问题描述

  • EMS Log on NetApp End报告 链路重置事件、 其中链路关闭并在 5秒内恢复。

Wed Feb 14 14:52:15 +0530 [NetApp1: fct_tpd_work_thread_0: scsitarget.slifct.linkBreak:error]: Link break detected on Fibre Channel target HBA 2c with event status 1 , topology type 1, status1 0x0, status2 0x0.
Wed Feb 14 14:52:20 +0530 [NetApp1: fct_tpd_work_thread_0: scsitarget.hwpfct.linkUp:notice]: Link up on Fibre Channel target adapter 2c.

Fibre Channel Target Adapter 2c
Received Optical Power - 996.9 (uWatts)
SFP Transmitted Optical Power - 992.0 (uWatts)

  • 在问题描述时间前后、存储端未报告任何其他FCP事件。
  • 连接的交换机端口未报告 porterrshow 输出-

/fabos/cliexec/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
75:  242.2k  398.3k   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

 

  • 交换机端口的状态为已启动且联机。

/fabos/bin/switchshow :
Index Slot Port Address Media  Speed     State   Proto
============================================================
75   9   11   654bxx  id   N32  Online   FC  F-Port  1 N Port + 1 NPIV public

 

  • Errdump 在问题描述时间内未报告任何此类错误事件。
  • Fabriclog 输出 显示了连接到受影响存储端口的交换机端口 遇到 重置。

Switch 0; Wed Feb 14 14:51:40 2024 IST (GMT+5:30)
14:51:40.025111 SCN Port Offline;rsn=0x2,g=0x6a        D0,P0  D0,P0  75   NA
14:51:40.025118 *Removing all nodes from port         D0,P0  D0,P0  75   NA
14:51:44.795477 SCN LR_PORT(0);g=0x6a             D0,P0  D0,P0  75   NA
14:51:44.858285 SCN Port Online; g=0x6a,isolated=0      D0,P0  D0,P1  75   NA
14:51:44.858365 Port Elp engaged               D0,P1  D0,P0  75   NA
14:51:44.858377 *Removing all nodes from port         D0,P0  D0,P0  75   NA
14:51:44.858608 SCN Port F_PORT                D0,P1  D0,P0  75   NA
14:51:44.968592 SCN LR_PORT(0);g=0x6a LR_IN          D0,P0  D0,P0  75   NA

 

  • 交换机端的SFP Tx电源看起来很好、这表明交换机SFP处于良好状态。
  •  交换机端的Tx功率(1238.9 uW)相比,Rx功率非常低(572.5uW)

=============
Slot  9/Port 11:
=============
RX Power:   -2.4   dBm (572.5uW)
TX Power:   0.9    dBm (1238.9 uW)

  • 而存储端Tx功率是SFP传输光功率- 992.0 (uWatt)
  • 这表明问题描述位于交换机上游的某个位置,可以是电缆或终端设备SFP (在本例中为NetApp存储)。

 

  • 需要执行电缆测试、以进一步隔离问题描述电缆是否出现故障。
  • 如果电缆正常、则必须交换连接到交换机的终端设备上的SFP。

 

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