Philippe:

Can you explain what you mean at the end of your email about power
consumption?  It's my understanding that the most power-hungry fat AP is
Cisco's 1200 series with two radios (one b/g and the other a), that's in the
12-13 watt range, I believe, still under the 15.4 W maximum.

Frank 

-----Original Message-----
From: Philippe Hanset [mailto:[EMAIL PROTECTED] 
Sent: Friday, June 23, 2006 11:13 AM
To: [email protected]
Subject: Re: [WIRELESS-LAN] Controller Architecture vs FAT APs

A few facts "for" the fats:

(BTW: those light-weights are as fat as heavy-weights!)

-Even as the number grows, FATS are still cheaper
 (probably a matter of supply/demand issue)
 eg: Our Cisco rep told us that more than 80% of sales
     are still FAT APs)

-Some vendor may lure you with cheap Lightweight APs
 but they get you on the controller pricing

-All traffic goes to a controller: What happened when the load
increases? (eg: 802.11n). Buy more controllers and build a cluster?

-Those controllers are usually PCs, with all their weaknesses.

-Proprietary: CBA solutions were not designed with Standard
              protocols in mind. You are locked in a solution
              until you infrastructure gets obsolete.
              What do you do with you infrastructure when
              Aruba/Trapeze/Meru goes belly up?
              (deep fry you lightweights)


There is no doubt that
eventually FATs will be limited by 802.3AF (power over ethernet)
once they have to handle multiple 802.1x sessions over 802.11n,
dealing with less than 15 Watts.
(can you see two cat5 drops to each AP coming soon!)
CBA solutions might be the future. Is now the right time?

Philippe Hanset

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