| 品牌：H3C | 电源电压：220V | 功耗：150W |
| 馈电电流：12.5A | 馈电电压：12V | 外形尺寸：150mm×25mm×40mm |
| 型号：LSPM1FANSA | 质保：一年 | 产品特性：开关电源 |
| 输入：100-240Vac/2A,50-60Hz | 输出：+12V=,12.5A |
| LSPM1FANSA | S5560 以太网交换机风扇模块(端口侧出风) |
| LSPM1FANSB | S5560 以太网交换机风扇模块(电源侧出风) |
| LSWM1STK | SFP+电缆0.65m |
| LSWM2STK | SFP+电缆1.2m |
| LSWM3STK | SFP+电缆3m |
| LSTM1STK | SFP+电缆5m |
| LSWM1QSTK0 | 40G QSFP+ 1m电缆 |
| LSWM1QSTK1 | 40G QSFP+ 3m电缆 |
| SFP-GE-SX-MM850-A | 光模块-SFP-GE-多模模块-(850nm,0.55km,LC) |
| SFP-GE-LX-SM1310-A | 光模块-SFP-GE-单模模块-(1310nm,10km,LC) |
| SFP-GE-LH40-SM1310 | 光模块-SFP-GE-单模模块-(1310nm,40km,LC) |
| SFP-GE-LH40-SM1550 | 光模块-SFP-GE-单模模块-(1550nm,40km,LC) |
| SFP-GE-LH80-SM1550 | 光模块-SFP-GE-单模模块-(1550nm,80km,LC) |
| SFP-GE-LH100-SM1550 | 光模块-SFP-GE-单模模块-(1550nm,100km,LC) |
| SFP-GE-LX-SM1310-BIDI | 光模块-SFP千兆BIDI光模块-TX1310/RX1490,10km,LC |
| SFP-GE-LX-SM1490-BIDI | 光模块-SFP千兆BIDI光模块-TX1490/RX1310,10km,LC |
| SFP-GE-T | 电模块-SFP-GE-(RJ45) |
| SFP-XG-SX-MM850-A | SFP+ 万兆模块(850nm,300m,LC) |
| SFP-XG-LX220-MM1310 | SFP+ 万兆模块(1310nm,220m,LC) |
| SFP-XG-LX-SM1310 | SFP+ 万兆模块(1310nm,10km,LC) |
| SFP-XG-LX-SM1310-E | SFP+ 万兆模块(1310nm,10km,LC) |
| SFP-XG-SX-MM850-E | SFP+ 万兆模块(850nm,300m,LC) |
问题描述：
现场所有的S5560系列交换机风扇信号灯黄灯闪烁，前面板SYS信号灯红色常亮。
现场环境：
检查交换机风扇配置信息发现交换机风扇的实际气流方向为：Airflow Direction: Port-to-power；而配置用户下看到风扇模块的优选气流方向为：Prefer Airflow Direction: Power-to-port，两者不一致（交换机风扇反转），导致交换机风扇状态为：FanDirectionFault，风扇信号灯告警，交换机SYS信号灯告警。
处理：
因为风扇模块的实际气流方向是无法改变的，只能去改变风扇模块的优选气流方向和风扇实际气流方向一致，操作步骤如下：
QIANZHI-B] [QIANZHI-B]dis fan Slot 1: Fan 1: State : FanDirectionFault //工作状态报错 Airflow Direction: Port-to-power //实际气流方向 Prefer Airflow Direction: Power-to-port //优选气流方向 Fan 2: State : FanDirectionFault Airflow Direction: Port-to-power Prefer Airflow Direction: Power-to-port
调整交换机的优选气流方向：
[QIANZHI-B]fan prefer-direction ? slot Specify the slot number [QIANZHI-B]fan prefer-direction slot 1 ? port-to-power From port to power power-to-port From power to port [QIANZHI-B]fan prefer-direction slot 1 port-to-power [QIANZHI-B] [QIANZHI-B]dis fan Slot 1: Fan 1: State : Normal //工作状态正常 Airflow Direction: Port-to-power //实际气流方向 Prefer Airflow Direction: Port-to-power //优选气流方向 Fan 2: State : Normal Airflow Direction: Port-to-power Prefer Airflow Direction: Port-to-power
修改配置后，交换机各指示灯恢复正常。
