Home page logo

nanog logo nanog mailing list archives

Re: Mae-WEST
From: Karl Denninger <karl () Mcs Net>
Date: Fri, 11 Jul 1997 23:14:25 -0500

On Fri, Jul 11, 1997 at 08:39:08PM -0700, Michael Dillon wrote:
At 8:20 PM -0400 7/11/97, Alex Rubenstein wrote:
According to nitrous.digex.net for its mae-west router:

card     inlet       hotpoint     exhaust
RSP(4)   26C/78F      38C/100F     44C/111F
This is the problem. MFS doesn't have proper cooling if the air if the
ambient air is this hot. It should be no higher than between 15C and 18C in
an equipment room like that.

Michael Dillon                    voice: +1-415-482-2840
Senior Systems Architect            fax: +1-415-482-2844
PRIORI NETWORKS, INC.              http://www.priori.net

"The People You Know.  The People You Trust."

Michael, c'mon...

15-18C?  19C is 66F -- that's very acceptable.  15C would be 59F!

In fact, 68F (at 40% RH) is pretty "standard" for most equipment rooms.  
We're config'd for a setpoint of 67F +/- 1F and 40% RH +/- 3%.

One of our more heavily loaded 7513s shows at present:

 card     inlet       hotpoint     exhaust
RSP(6)   19C/66F      29C/84F      25C/77F

That's right where it should be.

BTW, exhaust temperature above hotpoint (which your stats show) is *not* a 
good thing.  I'd find out what's going on there -- you may have some kind 
of obstruction with the airflow.

Karl Denninger (karl () MCS Net)| MCSNet - The Finest Internet Connectivity
http://www.mcs.net/~karl     | T1's from $600 monthly to FULL DS-3 Service
                             | 99 Analog numbers, 77 ISDN, http://www.mcs.net/
Voice: [+1 312 803-MCS1 x219]| NOW Serving 56kbps DIGITAL on our analog lines!
Fax:   [+1 312 803-4929]     | 2 FULL DS-3 Internet links; 400Mbps B/W Internal

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]