由于终端设备SFP出现故障、Brocade FC端口脱机并处于No_Sync状态

适用场景

• Brocade FC 交换机
• 网络结构操作系统（ FOS ）

问题描述

• Brocade光纤通道端口处于、No_syncDisabled 在 switchshow 输出下处于状态： 

/fabos/bin/switchshow :
Index Slot Port Address Media  Speed        State    Proto
============================================================
120 4 24 6f7800 id N32 No_Sync FC Disabled (Port Throttled)

 152   4   24   0f9840   id   N32    No_Sync    FC  Disabled (Port State Change threshold exceeded)
 

• PCS error ，uncorr error 以及 link fail loss signal errors在下报告的 porterrshow

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 152: 22.6k 15.2k 0 0 0 0 0 0 0 0 16 17 17 0 0 0 0 4.1k 1.1k

• defALL_HOST_PORTSITW_21受影响交换机端口上的errdump下报告的规则：

2023/01/06-01:18:52, [MAPS-1003], 207782, SLOT 2 | FID 128, WARNING, switch, slot12 port37, F-Port 12/37, Condition=ALL_HOST_PORTS(ITW/min>21), Current Value:[ITW, 5616 ITWs], RuleName=defALL_HOST_PORTSITW_21, Dashboard Category=Port Health. 2023/01/06-16:45:46, [MAPS-1003], 208332, SLOT 2 | FID 128, WARNING, switch, slot12 port37, F-Port 12/37, Condition=ALL_HOST_PORTS(ITW/min>21), Current Value:[ITW, 1764 ITWs], RuleName=defALL_HOST_PORTSITW_21, Dashboard Category=Port Health.

• sfpshow报告Tx和Rx功率处于建议范围

=============
Slot  4/Port  24:
=============
Identifier:  3    SFP
Connector:   7    LC
Transceiver: 6804404000000000 8,16,32_Gbps M5 sw Short_dist
Encoding:    6    64B66B 

.............................................

RX Power:   -0.6   dBm (861.3uW)
TX Power:   -0.3   dBm (933.0 uW)

• 由于端口处于已禁用状态、sfpshow输出报告Tx功率非常低、Rx功率接近阈值。

Slot  4/Port 24:
=============
RX Power:   -3.5   dBm (451.1uW)
TX Power:   -40.0   dBm (0.1   uW)

• sfpshow将低Rx和Tx功率报告为 -INF：

============= Slot 12/Port 37: ============= RX Power: -8.8 dBm (132.0uW) TX Power: -inf dBm (0.0 uW) 

• errdump下报告了多个链路重置：

2022/11/11-18:22:58, [C5-1014], 17914, SLOT 1 | CHASSIS, WARNING, XXX,  Link Reset on Port S6,P296(120) vc_no=3 crd(s)lost=1 auto trigger.
2022/11/11-18:29:41, [C5-1040], 17915, SLOT 1 | CHASSIS, WARNING, XXX, Multi RDY/Frame Loss detected on Slot 6, Port 296(120) m_rdy(0x0)/m_frame(0x1). Link Reset done.
2022/11/11-18:29:41, [C5-1014], 17916, SLOT 1 | CHASSIS, WARNING, XXX,  Link Reset on Port S6,P296(120) vc_no=0 crd(s)lost=1 auto trigger.
2022/11/11-18:39:24, [C5-1023], 17918, SLOT 1 | CHASSIS, WARNING, XXX, Single RDY/Frame Loss detected and recovered on Slot 6,Port 296(120) rdy(0x0)/frame(0x1).
2022/11/11-18:43:46, [C5-1040], 17919, SLOT 1 | CHASSIS, WARNING, XXX, Multi RDY/Frame Loss detected on Slot 6, Port 296(120) m_rdy(0x0)/m_frame(0x1). Link Reset done.
2022/11/11-18:43:46, [C5-1014], 17920, SLOT 1 | CHASSIS, WARNING, XXX,  Link Reset on Port S6,P296(120) vc_no=0 crd(s)lost=1 auto trigger.

• 验证交换机端SFP Tx和Rx电源是否在 建议的范围内。

• 要进行故障隔离，请交换交换机端SFP并执行电缆测试。

• 如果问题仍然存在、则必须查看终端设备。

• 检查HBA/主机并确认HBA能够以何种速度运行、然后尝试使用portCfgSpeed 命令相应地(手动)设置交换机端口的速度并进行检查。