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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: cpu needed to NAT 45mbs
Frank Bulk wrote: > I would have disagree with your point on centralized AP controllers -- > almost all the vendors have some form of high availability, and Trapeze's > offering, new (and may not yet be G.A) purports to be almost entirely > seamless in its load sharing and failover support. I have a few scars to show from deploying centralized ap controllers, from several vendors including the one that you mention above. Hence my observation that they must be deployed in a HA setup in that sort of environment... We you lose a fat-ap, unless cascading failure ensues you just lost one ap... When your ap-controller with 80 radio's attached goes boom, you are dead. So, as I said if you're going to use a central ap controller for an environment like this you need to avail yourself of it's HA features. > Now that dual-band radios in laptops are becoming more prevalent, it's > possible to get 30 to 50% of your user population using 802.11a. > > Frank > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Joel > Jaeggli > Sent: Saturday, November 10, 2007 11:51 PM > To: Adrian Chadd > Cc: Suresh Ramasubramanian; [email protected] > Subject: Re: cpu needed to NAT 45mbs > > Adrian Chadd wrote: >> On Sat, Nov 10, 2007, Suresh Ramasubramanian wrote: >> >>> Speaking of all that, does someone have a "conference wireless' bcp >>> handy? The sort that starts off with "dont deploy $50 unbranded >>> taiwanese / linksys etc routers that fall over and die at more than 5 >>> associations, place them so you dont get RF interference all over the >>> place etc" before going on to more faqs like what to do so worms dont >>> run riot? >>> >>> Comes in handy for that, as well as for public wifi access points. >> Everyone I speak to says something along the lines of >> >> "Why would I put that sort of stuff up? I want people to pay me for >> that kind of clue." > > I did a presentation a couple of years ago at nanog on high-density > conference style wireless deployments. It's in the proceedings from > Scottsdale. Fundamentally the game hasn't changed that much since then: > > Newer hardware is a bit more robust. > > Centralized AP controllers are beguiling but have to be deployed with > high availability in mind because putting all your eggs in a smaller > number of baskets carriers some risk... > > If you can, deploy A to draw off some users from 2.4ghz. > > Design to keep the number of users per radio at 50 or less in the worst > case. > > Instrument everything... > > >> There are slides covering basic stuff and observations out there. >> >> (I'm going through a wireless deployment at an ISP conference next week; >> I'll draft up some notes on the nanog cluepon site.) >> >> >> >> >> Adrian >> > >
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