Michael:
Was capacity defined around number of users per AP, bandwidth per AP, or some other metric? Kind regards, Frank From: King, Michael [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 13, 2007 3:32 PM To: [email protected] Subject: Re: [WIRELESS-LAN] 802.11n Draft 2.0 True, you are correct about the gig port. However, it's something to be aware of. I can think of a few locations were I've designed networks, and they are at the design capacity. (And we didn't expect it to happen that fast. We designed for about 16 users per AP Max load) From: Frank Bulk [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 13, 2007 4:25 PM To: [email protected] Subject: Re: [WIRELESS-LAN] 802.11n Draft 2.0 Michael: I would argue that 802.11n APs don't require gigabit Ethernet ports, though it would help with the occasional burst of traffic. Schools who can't afford an edge switch and wireless upgrade in one year could easily get away with doing 802.11n draft gear this year, and edge switching the next. In regards to power, almost all the vendors have some kind of solution or workaround. Some use a second Ethernet port others power down a radio chain. Cisco is using CDP to negotiate more power out of select models of their switch - see this article for more details: http://www.networkcomputing.com/immersion/802.11n/showArticle.jhtml?articleI D=201804302 Good point about the certification for GigE mid-span PoE. I'm not sure if the IEEE 802.3af standard ever addressed mid-span for GigE, but it is addressed in 802.3at. Regards, Frank From: King, Michael [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 13, 2007 2:29 PM To: [email protected] Subject: Re: [WIRELESS-LAN] 802.11n Draft 2.0 Great question.. Two points you need to know... 1252's require gigabit Ethernet ports. (Any 802.11n is going to need gigabit Ethernet ports. The actual throughput is over 100Mbs) You'll need extra power. Not many (if any) 802.11n AP's with dual radios can run on standard POE. Cisco is supposed to be releasing a firmware for their 3750's that will allow it to power the 1252's, but otherwise you'll be regulated to power injectors, or third party mid-span devices. (That are gig certified) Mike From: Lee Weers [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 13, 2007 3:25 PM To: [email protected] Subject: [WIRELESS-LAN] 802.11n Draft 2.0 We are looking at a campus wide wireless deployment, and my supervisor is pushing for a complete Cisco 1252 with N draft 2.0 capability. We would have about a total of 250 to 300 AP's in full deployment. Our wired infrastructure is currently 100% Procurve with about 90% of it being 10/100 switched. I'd like to know what other schools are doing with 802.11n. Thank you, Lee Weers Assistant Director for Network Services Central College IT Services (641) 628-7675 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
