近日 新上一臺H3C的5820X-26s的萬兆交換機
開機連接發現如下問題日誌大量報如下錯誤
Apr 26 15:32:26:821 2015 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.
經查資料發現，H3C的該系列交換機可對風扇的風向做調整 以便散熱
配置方式如下：
[H3C]display fan
Slot 1
FAN 1
State : FanDirectionFault
Wind Direction :Port-to-Power
Prefer Wind Direction :Power-to-Port
FAN 2
State : FanDirectionFault
Wind Direction :Port-to-Power
Prefer Wind Direction :Power-to-Port
配置風扇期望方向：
system-view
[H3C]fan prefer-direction slot 1 port-to-power
%Apr 26 15:45:16:821 2015 H3C DEV/5/FAN_RECOVERED: Fan 1 recovered.
%Apr 26 15:45:16:821 2015 H3C DEV/5/FAN_RECOVERED: Fan 2 recovered