What you really need here is the minimum acceptable throughput that the application will require -It is advisable to measure this yourself on multiple platforms - manufacturer/supplier numbers are good - but Trust and Verify is always a better career bet.
11ac is an extension of 11n. Those of you who were around for the 11n roll out will notice a lot of déjà vu. The big difference with 11ac is that end users care about wireless speeds now. Client devices are differentiating themselves with 11ac support (HTC One, Samsung GS4, MacBook Air)
While 11ac allows for more spatial streams in the standard. The first generation will be 3 streams like 11n. None of the throughput improvements will come from the number of streams.Additionally, you have to have as many antennas as you have streams. Which requires more space, power, etc. So devices won’t really change from where they are.
More on channel widths later. The important thing to know right now is that you get more than a 1 for 1 improvement in throughput. And we think must customers can deploy 80 mhz channels without significant problems now that the standard does a better job of detecting channel width. The AP will automatically fall back to 20 or 40 mhz channels.
FCC: US, Australia Canada, Colombia, Korea, Mexico, New Zealand, Singapore, Taiwan (all core countries), and moreOrange = cannot be used due to doplar weather radar interferenceBlue = added 144 which opened a 20, 40 and 80 mhz channelPattern = FCC DFS requiredFCC has talked about adding additional channels but there is no official word on that yet. Unknown is new hardware will be required because we don’t know what the DFS requirements will be.Most customers will deploy 80 MHz channels. There is a dynamic per packet channel width decision made in 11ac. Some of that was standard in 11n but the sensitivity was too low (-62) and it has been increased to -72 and seems to work now.High density deployments and special cases may still want 20 or 40 mhz channels depending on utilization and use case.
ETSI: EU, Argentina, Brazil, Egypt, Hong Kong, India, Indonesia, Malaysia, Qatar, Saudi Arabia, South Africa, Thailand, UAE (all core countries), and moreJapan: similar restrictions, different power limits, DFS detailsPattern = ETSI DFS required
Same range for rates that also exist in 11n, add 2 more rates in coreNote that coverage areas may expand using 11ac TxBF
Rates are ~doubled, but range is slightly reduced
Signal level: assumes a site survey is done with an AP transmitting at +17dBm
2.4 ghz will mostly remain 20 mhz 11n so those speeds will still be on the network5 ghz will transition to 80 mhz in most cases from the 40 mhz. Single stream smart phones see some of the largest benefits from 11ac going from 72.2 mhz (2.4 ghz) to 433. Many phones are making the switch from 2.4 to 5 as part of the 11ac migration.Single 11ac client, 5GHz radio13x3 11ac VHT80 N/ATCP UP/Down, UDP UP/Downd-tunnel 825870,920930 tunnel650672,800776 bridge825865,920945
TurboQAM: proprietary solution to support 11ac 256-QAM modulation in 2.4GHz, potentially offering 33% throughput increase (600Mbps)802.3af POE:No USBNo second Ethernet port1X3:1ss 2.4GHz radio2x3:2ss 5GHz radio
Dual personality ports can be used for out of band management. Put them on a separate vlan and protect them from broadcast storms.A single PSU is enough to power the controller. Load sharing really has to do with the hot swappable nature. They are 350 watt PSUs.7240 and 7220 will bookend the M3. The 7210 will replace the 3600. The 3600 will drop in price and become the low end controller.Expansion slot is for DPI. S3500 expansion slot is for session based firewall capabilities that the controller has today. For DPI you will have to have a controller.No more distinction between CAP and RAP capacity counts. The AP count is the AP count.Field replaceable fan with variable speed control and front to back cooling.Dedicate HA interconnect using the GE port.
The migration to 11ac won’t fundamentally change the applications users use. It sill increase the airtime available for users by clearing up the air faster since users will take less time to get their data.For the large software company, they would need 10x 7240s to manage all of those APs. 10x 7240s would result in 400 gpbs firewall throughput. That means 97% of their firewall throughput would be idle. For the university, they would need 2x 7240s forthat many APs. That means 80 gbps of firewall throughput, leaving 74 gigs free, or 92% idle.