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存储上的SFP功率低于建议值

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执行

适用场景

  • FAS/AFA系统
  • ONTAP 9
  • 光纤通道(FC) 

问题描述

  • FC链路中断、链路轻拍和/或FCP性能下降。
  • Sysconfig -a 将状态显示为link not connected""或link disconnected ""

    slot 0: Fibre Channel Target Host Adapter 0h
            (QLogic 8324 (8362) rev. 2, <LINK NOT CONNECTED>)
             Firmware rev:    8.9.0
             Flash rev:      4.1.0
             Host Port Addr:   000000
             Connection:     No link
             Switch Port:     Unknown   xxxx:41
                   SFP Vendor Name:   AVAGO
                   SFP Vendor P/N:   AFBR-57F5MZ-NA1
                   SFP Vendor Rev:   01
                    SFP Connector:    LC
                   SFP Capabilities:  4, 8, 16 Gbit/Sec

  • FCP-ADAPTER.XML 登录ASUP 会将 受影响端口的Rx/Tx值显示为0.0 uW。

    Rx : 0.0 (uWatts)
    Tx : 0.0 (uWatts)

  • 收到有关NetApp上的存储LIF的以下错误:
Service: Interface FCP XXX.FC_LIF State: CRITICAL Time: Wed Mar 15 15:16:13 CET 2023 Description: CRIT - State: online, 8 Gbit/s (wrong speed, expected 16 Gbit/s)(!!), Address x0:0a:09:84:80:74:xy:xx, Read: 1235654.27, Write: 9303298.57, Read OPS: 71, Write OPS: 138, Latency: 1.15 ms, Read Latency: 0.03 ms, Write Latency: 1.08ms
  • EMS 记录以下事件-
    Tue Feb 27 00:20:29 +0000 [netapp: fct_tpd_work_thread_0: scsitarget.fct.sfpTxPowerLow:alert]: The SFP in FC target adapter 0f reports that it is transmitting (TX) at a low level of power. Operating value 263 (uWatts), Threshold value 317 (uWatts).

 

  • network fcp adapter show 在ONTAP命令行界面上显示低TX功率:

Received Optical Power   570.7 (uWatts)
SPF Transmitted Optical Power   123.8 (uWatts)

  • Rx功率低表示问题描述上游连接到存储端口、即交换机端的缆线和SFP中的硬件有故障  这不是存储上的SFP的问题。
  • 低Tx功率表示存储端口上存在问题描述。
  • 以下值为近似值:

SFP版本

光值范围

短波2/4/8GB SFP接收功率范围

短波2/4/8GB SFP传输功率范围

-6 dBm (250 uWatt)到-2 dBm (630 uWatt)

-6 dBm (250 uWatt)到0 dBm (1000 uWatt)

短波4/8/16 Gb SFP接收功率范围

短波4/8/16 Gb SFP传输功率范围

-5.2 dBm (300 uWatt)到0 dBm (1000 uWatt)

-5.2 dBm (300 uWatt)到-1 dBm (790 uWatt)

短波8/16/32 Gb SFP接收功率范围

短波8/16/32 Gb SFP传输功率范围

-4.6 dBm (340 uWatt)到2 dBm (1580 uWatt)

-4.6 dBm (340 uWatt)到2 dBm (1580 uWatt)

  • 可能发生关联:
    • 增加交换机端口上的错误计数器
    • 主机操作系统出现IO故障和/或超时
    • 来自主机操作系统的一个或多个故障路径
    • 存储控制器上的FC目标端口处于<OFFLINE>或 <LINK NOT CONNECTED>状态
    • 链路重置/端口重置
    • 适配器发现挂起错误

 

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