> actually japan has four non-overlapping channels 802.11 channel 1 6 11 14 > whereas the US has only three because their 2.4ghz ism band goes from > 2.4-2.5 and ours goes from 2.4-2.483. some commonwealth countries have > more stringent output regulations than the US or JP but that's not an > issue here. > Thanks for the correction. I don't know where I got the idea it was a lower number of channels. Maybe some other country. > the accompaning issues is more than 60-100 clients per ap (and ~200=death) > really results in reduced performance as well, particulallry if most of > them are active so more ap's can result in better localized performance, > assuming you get a handle on the rf issue. Maybe events like IETF need some hypothetical micro-cell below even the normal small cell size, so you can seed enough stations in the room to meet demand. > > rogue ap and adhoc nodes result in their own set of confusion assuming you > client works right the biggest effect should be more noise, if your client > doesn't work properly (the apple one apparently) then other bad things may > happen. I think we just did Apple a huge favour showing them some serious scaling problems with their current implementation. Better its found out here than in the real world! > yeah it can be tested but the rf environement looks way wierder with 1200 > addional transmitters and 50 tons of rf absorbing meat in the space then > it does without them so unless you have a very cool testbed environment > you don't really know what your changes will do unless you try them. > > Not to get too vendor centric the Cisco tools really helped us map hotspots at work, but I'm not sure it would work as well here. Maybe some kind of instrumented (netramet? flows??? :-) drivers could turn us all into a version of the Jun IPv6 windscreen wiper trick on taxi's, but as a health meter on the network. Summarized status could be sent in Multicast for a collection agent. -George > -------------------------------------------------------------------------- > Joel Jaeggli Academic User Services joelja@darkwing.uoregon.edu > -- PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E -- > In Dr. Johnson's famous dictionary patriotism is defined as the last > resort of the scoundrel. With all due respect to an enlightened but > inferior lexicographer I beg to submit that it is the first. > -- Ambrose Bierce, "The Devil's Dictionary" -- George Michaelson | APNIC Email: ggm@apnic.net | PO Box 2131 Milton QLD 4064 Phone: +61 7 3858 3100 | Australia Fax: +61 7 3858 3199 | http://www.apnic.net