请教各位关于WS-C4507-E交换机（WS-X45-SUP7-E）的VFE和NFE问题
以下是show environment信息：
warning alarm: slot 3 has exceeded the warning temperature for 800h 31m 19s
Module Sensor Temperature Status
------+--------------------------+--------------------+------------
1 air inlet 34C (41C,56C,66C) ok
1 air outlet 42C (50C,64C,74C) ok
3 Stub A 51C (58C,71C,74C) ok
3 Stub B 37C (54C,68C,71C) ok
3 XPP 65C (67C,81C,84C) warning
3 VFE 84C (79C,90C,93C) warning
3 NFE 63C (68C,80C,73C) ok
3 CPU 73C (69C,83C,86C) warning
3 FPGA 45C (57C,71C,74C) ok
5 air inlet 30C (41C,56C,66C) ok
5 air outlet (front) 29C (43C,57C,67C) ok
5 air outlet (back) 30C (45C,59C,69C) ok
6 air inlet 28C (41C,56C,66C) ok
6 air outlet (front) 28C (43C,57C,67C) ok
6 air outlet (back) 28C (45C,59C,69C) ok
Power Fan Inline
Supply Model No Type Status Sensor Status
------ ---------------- --------- ----------- ------- -------
PS1 PWR-C45-1300ACV AC 1300W good good good
PS2 PWR-C45-1300ACV AC 1300W good good good
Power supplies needed by system : 1
Power supplies currently available : 2
Chassis Type : WS-C4507R+E
Power consumed by backplane : 40 Watts
Switch Bandwidth Utilization : 0%
Supervisor Led Color : Green
Module 1 Status Led Color : Green
Module 3 Status Led Color : Orange
Module 5 Status Led Color : Green
Module 6 Status Led Color : Green
Fantray : Good
Fantray removal timeout : 30
Power consumed by Fantray : 135 Watts
同时show log中有这样的告警：
Jun 10 16:21:20.918: %C4K_IOSMODPORTMAN-4-MODULETEMPHIGH: Module 3 Sensor XPP temperature is at or over threshold - CurrentTemp: 67C, Threshold: 67C
Jun 5 04:58:12.917: %C4K_IOSMODPORTMAN-4-MODULETEMPHIGH: Module 3 Sensor VFE temperature is at or over threshold - CurrentTemp: 79C, Threshold: 79C
请教各位：
1.VFE和XPP是什么？
2.这类告警对设备会不会造成影响？
3：有什么办法对这个温度降低一点？
