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由于终端设备SFP出现故障、在Rx电源较低的Brocade交换机端口上报告PCS错误

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brocade<a>2009年342788</a>
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适用场景

Brocade 交换机

问题描述

  • 在交换机端口上观察到 PCS 错误:
/fabos/cliexec/porterrshow : frames enc crc crc too too bad enc disc link loss loss c3timeout pcs uncor tx rx in err g_eof shrt long eof out c3 fail sync sig tx rx err err 172: 276 165 0 3 2 0 0 1 0 0 2 0 2 0 0 89.7m 0
  • 报告的 Rx 功率低: 

=============
Slot  5/Port 28:
=============
RX Power:   -6.9   dBm (203.9uW) ​​​​​​
TX Power:   -1.1   dBm (784.2 uW)

 

  • portstatsshow 输出报告er_pcs_blk 错误计数器、如下所示:
portstatsshow 135 er_bad_os 0 Invalid ordered set er_pcs_blk 510 PCS block errors 
  • rules -defALL_HOST_PORTSITW_21defALL_TARGET_PORTSITW_11 、并defALL_32GSWL_SFPRXP_63在errdump下触发:

2022/10/19-03:45:31, [MAPS-1003], 257687, SLOT 2 | FID 128, WARNING, XXX, slot12 port13, F-Port 12/13, Condition=ALL_HOST_PORTS(ITW/min>21), Current Value:[ITW, 20777 ITWs], RuleName=defALL_HOST_PORTSITW_21, Dashboard Category=Port Health.

2022/10/19-03:45:31, [MAPS-1003], 257687, SLOT 2 | FID 128, WARNING, XXX, slot4 port32, F-Port 4/32, Condition=ALL_TARGET_PORTS(ITW/min>11), Current Value:[ITW, 15348 ITWs], RuleName=defALL_TARGET_PORTSITW_11, Dashboard Category=Port Health.

2022/10/19-03:46:25, [MAPS-1004], 257747, SLOT 2 | FID 128, INFO, XXX, SFP 12/13, Condition=ALL_32GSWL_SFP(RXP<=63), Current Value:[RXP, 44 uW], RuleName=defALL_32GSWL_SFPRXP_63, Dashboard Category=Port Health.

 

 

  • 或者、您也可以按照以下步骤插入已知正常的设备、以便对缆线和SFP进行故障隔离:
  1. 为了对硬件进行故障隔离、请将缆线移至交换机端的下一个可用端口、并观察是否有任何增量:
  2. 如果新端口出现问题、请更换电缆/配线板并验证端口计数器
  3. 如果问题描述 未连接到新端口、请将受影响端口的SFP交换为已知正常工作的SFP、并查看错误是否已解决

 

  • 清除交换机统计信息(statsclear slotstatsclear),并观察端口(使用porterrshow )以进一步验证是否仍记录了错误。

 

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