Incorrectly assembled fan trays on the Catalyst 6500 six-slot chassis have the fans installed in the fan tray bracket in a reversed orientation.
An error in a supplier's process caused a few units to be assembled incorrectly. These units have the fan blades in the reversed orientation. The airflow direction through the chassis is reversed when using the affected fan trays. The correct airflow is evacuating the chassis. Good units should have the air pulled through the chassis and blowing out the left side when facing the card cage and fan tray access side of the chassis.
Although the airflow direction is reversed when using an affected fan trays, there is no immediate impact to the functionality of the system. However, continued use of this affected fan tray may cause overheating in some configurations resulting in unscheduled system shutdowns.
Affected units can be identified by serial number of chassis or by visual inspection. The affected units need to have the Fan Tray replaced.
Please confirm the serial number is within the ranges specified above. Also verify by visual inspection that the blades are reversed. Once that is confirmed, please use the standard RMA process to obtain an unaffected fan blade.
How to Identify Serial Numbers
Affected units can be identified through the chassis serial numbers listed above. To identify the serial number of your chassis, use the following commands:
When using CatOS, use the show version command.
Console> (enable) show version WS-C6506 Software, Version NmpSW: 6.4(0.15-Eng) Copyright (c) 1995-2003 by Cisco Systems NMP S/W compiled on Jan 9 2003, 04:01:04 System Bootstrap Version: 5.3(1) Hardware Version: 2.0 Model: WS-C6506 Serial #: TBA04501415 <<====== Serial Number Here PS1 Module: WS-CAC-1300W Serial #: SON04373422 Mod Port Model Serial # Versions --- ---- ------------------- ----------- -------------------------------------- 1 2 WS-X6K-SUP1A-2GE SAD05010MT2 Hw : 7.0 Fw : 5.3(1) Fw1: 5.4(2) Sw : 6.4(0.15-Eng) Sw1: 6.4(0.15) WS-F6K-PFC SAD050201N0 Hw : 1.1 6 48 WS-X6348-RJ-45 SAL05052WYD Hw : 1.4 Fw : 5.4(2) Sw : 6.4(0.15) 15 1 WS-F6K-MSFC SAD05010KH3 Hw : 2.1 Fw : 12.1(20030109:202654 Sw : 12.1(20030109:202654 DRAM FLASH NVRAM Module Total Used Free Total Used Free Total Used Free ------ ------- ------- ------- ------- ------- ------- ----- ----- ----- 1 130944K 50454K 80490K 16384K 9740K 6644K 512K 269K 243K Uptime is 19 days, 9 hours, 50 minutes
When using Cisco IOS? Software, use the show idprom backplane command.
Router# show idprom backplane IDPROM for backplane #0 (FRU is 'Catalyst 6500 6-slot backplane') OEM String = 'Cisco Systems' Product Number = 'WS-C6506' Serial Number = 'TBA04010594' <===== Serial Number Here Manufacturing Assembly Number = '73-3436-02' Manufacturing Assembly Revision = 'B0' Hardware Revision = 2.0 Current supplied (+) or consumed (-) = -A
How To Identify Hardware
You can identify affected hardware though visual inspection.
Good fan tray.
Bad fan tray.
To verify correct fan orientation, check for labels on fan rotor. The white or silver round labels located on each fan rotor hub should be visible when viewed through the ventilation perforation on the left side (fan tray side) of the chassis.
Please see the photos below for the differences between Good and Bad units partially inserted, you can see the labels through the ventilation performations on good units.
Good fan tray.
Bad fan tray.
For More Information
If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods: