High-speed vs. regular-speed fan

[Garrick]

Hello All,

I have a simple question but it is dumbfounding a 'newbie' to the 8600 world and in dealing with fan cards.  I have an 8006 chassis that as in a prior post I am going to put in some RS modules.  I took the warnings concerning the need for a high-speed fan and after some digging, I found in an AVAYA traing manual that a high speed fan card has 6 fans on it.  The card I have in the chassis simply says 'Fan', it does not stat a model number or 8006CMHS or anything, just 'Fan', but since it has 6 fans, I assumed it had to be a high-speed fan card.  Well the RS cards arrived yesterday, I put them in last night and they would not power up, complaing of lack of a fan.  I looked in some docs and got to run the 'show tech' command and it says that the fan is regularSpeed.  What does a high-speed fan card look like?  Is this card not one?  Is there a command or flag that must be ran to promote the card to be high-speed?

Thanks in advance!

[Michael McNamara]

You're not the first person to run into this problem....

http://blog.michaelfmcnamara.com/2011/10/ethernet-routing-switch-8600-high-speed-fan-tray-8010cmhs/

You'll need to order a 8006CMHS.... from a show tech you should see the following;


Fan Info :

        Fan#1: up, type: highSpeed, air temp: 26 C
        Fan#2: up, type: highSpeed, air temp: 24 C


As compared to the original fan modules;


Fan Info :

        Fan#1: up, type: regularSpeed, air temp: 25 C
        Fan#2: up, type: regularSpeed, air temp: 25 C


Cheers!

[Garrick]

Thanks Michael! Yep, i found your article last night when i was searching around for what the error meant.  Was afraid i was going to need to buy thosefan trays.

[jfarinha]

I believe I have a note somewhere explaining how to "override" that fan check and run the RS cards... Of course that is completely unsupported by Avaya, but sometimes just to test a new feature while the new fans don't arrive...

I will search for it tomorrow.

[Michael McNamara]

You can but I would NEVER advise it... the RS cards put off a LOT of heat and you can easily and quickly burn them out depending on how busy they are (and how many SFPs you have installed).

!!!PLEASE USE AT YOUR OWN RISK!!!

You can check the current setting by looking at the top of your configuration file (/flash/config.cfg). You should find the following two lines.


#!power power-check-enable true
#!power fan-check-enable true


You can disable the power check and fan check with the following commands;


config sys set fan-check-enable <true|false>
config sys set power power-check-enable <true|false>


I'm not sure if you need to restart/reboot the switch for the change to take effect.

Cheers!