[c-nsp] High temperatures on cisco 6504-E chassis

[Maarten Moerman]

Hi Charles,

(i'm a colleague) , we've just installed them, fresh new suite, fresh new
cisco's. There's also no production traffic on it yet, just testing at this
moment. I think they've been up for little over a month.

There's no blocking in airflow, also seems that inlet temps that the cisco
is reporting, is not the temp we see when using a temp reader in front of
the chassis (10C difference)

Maybe it's the fact that these are sup720-3cxl-10ge , with X2 modules
installed (which also seem to get hot, 41C), and this packed in a small
chassis.... 

Just looking for answers from somebody who has similar experience with the
6504 chassis.

Maarten


On 7/10/08 3:26 PM, "Church, Charles" <cchurc05 at harris.com> wrote:

> How long ago were the switches installed?  Is it possible there is an
> accumulation of dust on the module/ASICs?
> 
> Chuck
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Koen
> Sent: Thursday, July 10, 2008 8:42 AM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] High temperatures on cisco 6504-E chassis
> 
> 
> Hi Robert,
> 
> I didn't read anything about this but if i look at some others chassis
> like a 6509 the in- and outlet temps are higher but the asic temps are
> 31C. Could it be the fan-tray of a 6504-e isn't powerfull enough to cool
> 
> the chassis?
> Thanks,
> 
> Koen
> 
> 
> Robert E. Seastrom wrote:
>> Koen <k.vdh at solcon.nl> writes:
>> 
>>> We got 2 WS-C6504-E chassis both with 1 sup 7203CXL and 2
>>> WS-X6748-GE-TX and we see that the asic temperature is always higher
>>> then 40C which is the max operational temperature according to the
>>> docs.
>> 
>> The max operational temperature quoted in documentation is almost
>> always ambient (or inlet) temperature, not the temperature of any
>> particular hot spot on the board.  At 30c inlet, you're well within
>> spec.  Is there something you have read that leads you to believe
>> things are different in this case?  Can you point me there if so?
>> 
>> -r
>> 
>> 
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