best practices on migrating to 802.11ac wi-fi #airheadsconf italy

Best Practices on

Migrating to 802.11ac Wi-Fi

Peter Lane

June 2014

CONFIDENTIAL

© Copyright 2013. Aruba Networks, Inc.

All rights reserved2 #airheadsconf

Changing Networks

More devices

• Average 3 devices per user

• Smartphone, tablets, laptops, ultrabooks

More applications per

device

• Average 40 apps per mobile device

• Estimates > 300 billion app downloads by 2016

More traffic

• HD mobile video, video telepresence, collaboration programs

• Tablet traffic ~ 3.4x greater than smartphone traffic

Shift in W-Fi Usage

• Pervasive, primary access

• Mission critical

• Multimedia –Voice, IPTV, older legacy media transport systems (i.e. cable TV)

3CONFIDENTIAL


All rights reserved#AirheadsConf

What type of Apps are on your network ?

• Mix of personal and corporate applications

• Design for the highest bandwidth demand that you intend to support

• Multiply this number by the number of connections that you need to

support

Personal Apps Throughput Requirements

FaceTime 400 Kbps

AirPlay Video 1 Mbps

Netflix 1.5 or 5 Mbps*

Pandora 150 Kbps

YouTube 500 Kbps

Skype 500 Kbps

HTTP 500 Kbps

Corporate Apps Throughput Requirements

Lync Desktop Sharing 1.5 Mbps

SIP Softphone 90 Kbps

Citrix Internet + Office 150 Kbps

Webex iPad Desktop Share

250 Kbps

WebEx High Quality Video

1.5 Mbps

GoToMeeting Desktop Share

500 Kbps

Desktop Backup 10 – 50 Mbps

Printing 1 Mbps

4CONFIDENTIAL



Clients

11ac Clients– Samsung Galaxy S4 (1x1:1 11ac), Galaxy S5 (2x2:2

11ac), Galaxy Note 3, Galaxy Note 10.1 2014, etc.

– HTC One (1x1:1 11ac)

– Moto X, Moto droid Ultra, etc.

– All Mac computers: MacBook Air (2x2:2 11ac), MacBook Pro (3x3:3 11ac) and iMacs

– Select Dell, Alienware, Lenovo laptops

– USB dongles (2x2:2 11ac)

• Look for USB 3.0

No significant impact on client battery life

11ac Standard Review

6CONFIDENTIAL



802.11ac Technology Overview

• 11n specification:

• 2.4 and 5 GHz supported

• Wider channels (40 MHz)

• Better modulation (64-QAM)

• Multiple streams (up to 4)

• Beam forming (explicit and

implicit)

• Backwards compatibility

with 11a/b/g

• 11ac introduces• 5 GHz supported

• Even wider channels (80 MHz and 160 MHz)

• Better modulation (256-QAM)

• Additional streams (up to 8)

• Beam forming (explicit)

• Backwards compatibility with 11a/b/g/n

Think of 11ac as an extension of 11n technology

7CONFIDENTIAL



802.11ac Channels (FCC)

Channel

Freq (MHz)

UNII I and UNII II

2x 80 MHz

4x 40 MHz

8x 20 MHz

Band

EdgeChannel

Freq (MHz) 5850

US UNII III

1x 80 MHz

2x 40 MHz

5x 20 MHz

Channel

Freq (MHz)

UNII II extended

3x 80 MHz

6x 40 MHz

12x 20 MHz

36 4844 5240 56 6460 Band

Edge

5180 5200 5220 5240 5260 5280 5300 5320 5350

Band

Edge

5150

149 161157153

5745 5765 5785 5805

Band

Edge

5725

165

5825

100 112108 116104 120 128124

5500 5520 5540 5560 5580 5600 5620 5640

Band

Edge

5470

136 140 Band

Edge

5680 5700 5725

132

5660

144

5720

Weather

Radar

8CONFIDENTIAL



802.11ac Channels (ETSI)

Channel

Freq (MHz)

UNII I and UNII II

2x 80 MHz

4x 40 MHz

8x 20 MHz

Channel

Freq (MHz)

UNII II extended

2x 80 MHz

5x 40 MHz

11x 20 MHz

36 4844 5240 56 6460 Band

Edge

5180 5200 5220 5240 5260 5280 5300 5320 5350

Band

Edge

5150

100 112108 116104 120 128124

5500 5520 5540 5560 5580 5600 5620 5640

Band

Edge

5470

136 140 Band

Edge

5680 5700 5725

132

5660

9CONFIDENTIAL



ARM Primary channel mapping

• ARM chooses primary 80, 40 and 20 MHz

channels

• Same way as existing channels are chosen

• Show AP details will show the channels selected

• 36+ means 40 MHz with a 36 primary and the

secondary taking the 20 MHz above 36

• 36e means 80 MHz with 36 as the primary

10CONFIDENTIAL



802.11ac Channels (FCC)

Channel

Freq (MHz)

UNII I and UNII II

2x 80 MHz

4x 40 MHz

8x 20 MHz

Band

EdgeChannel

Freq (MHz) 5850

US UNII III

1x 80 MHz

2x 40 MHz

5x 20 MHz

Channel

Freq (MHz)

UNII II extended

3x 80 MHz

6x 40 MHz

12x 20 MHz

36 4844 5240 56 6460 Band

Edge

5180 5200 5220 5240 5260 5280 5300 5320 5350

Band

Edge

5150

149 161157153

5745 5765 5785 5805

Band

Edge

5725

165

5825

100 112108 116104 120 128124

5500 5520 5540 5560 5580 5600 5620 5640

Band

Edge

5470

136 140 Band

Edge

5680 5700 5725

132

5660

144

5720

Weather

Radar

11CONFIDENTIAL



Channel Usage with two APs

12CONFIDENTIAL



Max Data Rates per Client Type

Channel

bandwidth

Transmit – Receive

antennas

Typical client scenario Max individual link rate Max aggregate link

rate

40 MHz 3x3 PC 606 Mbps 606 Mbps

80 MHz 1x1 Smartphone 433 Mbps 433 Mbps

80 MHz 2x2 Tablet, PC 867 Mbps 867 Mbps

80 MHz 3x3 PC 1300 MBPS 1300 MBPS

160 MHz 1x1 Smartphone 867 Mbps 867 Mbps

160 MHz 2x2 Tablet, PC 1.73 Gbps 1.73 Gbps

160 MHz 4x Tx AP,

4 clients of 1x Rx

Multiple smartphones 867 Mbps per client 3.47 Gbps

160 MHz 8x Tx AP, 4 clients

with total of 8x Rx

Digital TV, set-top box,

tablet, PC, smartphone

867 Mbps to two 1x clients

1.73 Gbps to one 2x client

3.47 Gbps to one 4x client

6.93 Gbps

13CONFIDENTIAL



802.11ac Channel Width and Datarate

• Maximum datarates (in Mbps) for each channel

width

802.11n 1SS

802.11n 2SS

802.11n 3SS

802.11ac 1SS

802.11ac 2SS

802.11ac 3SS

20 MHz 72.2 144.4 216.7 96.3 192.6 288.9

40 MHz 150 300 450 200 400 600

80 MHz N/A N/A N/A 433.3 866.7 1,300

14CONFIDENTIAL



Coverage Example

1. Sample coverage for 3x3 11n AP (or 3x3 11ac AP with

11n clients) in HT40 mode

•Coverage area sustains MCS5 and up

360405

450

15CONFIDENTIAL



Coverage Example

2. Upgrade to 3x3 11ac AP with 11ac clients, still using

40Mhz channels (VHT40)

•Radius for 600Mbps (MCS9) area is 1/4 of that for 450Mbps (MCS7)

360405

450

540

600

16CONFIDENTIAL



Coverage Example

3. Equivalent range for clients using 80MHz channels

(VHT80)

•Rates roughly double, relative range for each of the MCS rates

does not change, but 80MHz range is ~70% of equivalent (same

MCS) 40MHz range

780878

975

1170

1300

585

17CONFIDENTIAL



Relative Range 802.11ac Rates

Datarate40MHz 80MHz

MCS0 45 97.5MCS1 90 195MCS2 135 292.5MCS3 180 390MCS4 270 585MCS5 360 780MCS6 405 877.5MCS7 450 975MCS8 540 1,170MCS9 600 1,300

Signal level and relative range-dB r

MCS0 87 63MCS1 85 50MCS2 83 40MCS3 79 25MCS4 76 18MCS5 71 10MCS6 66 5.6MCS7 63 4.0MCS8 58 2.2MCS9 51 1.0

18CONFIDENTIAL



Beamforming: Notes

• AP 2xx series has 11ac beam forming support

• Works with clients that support 11ac beamforming function– This is at a minimum all 11ac client devices using Broadcom chipsets

– Support will have to come to all devices to compete with Broadcom offering

• 11ac beamforming is standards based– first standard that is doing this the “right” way

– 11ac beamforming represents the consensus view of the 1000’s of contributors to the standards process

• 11ac beamforming is implemented in baseband. – It works with all antenna subsystems

– The total number of beamforming combinations is effectively infinite

• 11ac actively tracks users so has a recent channel estimate between the AP and client that is updated frequently

18

19CONFIDENTIAL



Channel state information, implicit and explicit beamforming estimation

19

Implicit feedback for beamforming (802.11n not 802.11ac)

1 (Beamformer) Send me a sounding frame

2 (Beamformee) Here’s the sounding frame

3 OK, I’ll pre-code assuming you hear me like I heard you

Request for sounding

sounding frames

Explicit feedback for beamforming (802.11n and 802.11ac)

1 (Beamformer) Here’s a sounding frame

2 (Beamformee) Here’s how I heard the sounding frame

3 Now I will pre-code to match how you heard me

sounding frames

Beamformed frames

feedback from sounding

Implicit and explicit feedback for beamforming

Beamformer BeamformeeBeamformeeBeamformer

Beamformed framesActual

CSI

Implied

CSI

20CONFIDENTIAL



AP Throughput ~1Gbps

• “How fast can I go?”

– Simple question with very complicated answer

– Depends on many factors

• Device type

• Distance

• Signal to Noise Ratio (SNR)

• Connected clients

• Access Point configuration

• Channel width

• Number of Spatial Streams

• Short/long guard intervals

• Link aggregation

– Your mileage WILL vary

21CONFIDENTIAL



Pros of 802.11ac

• Pros1. APs can accommodate more users/devices

• Increased capacity

2. Standards based Explicit Beam-forming increases SNR

• Higher data rates over longer distances

3. 256-QAM

• Increased throughput at high SNRs

• Improved modulation and coding techniques

4. Multi-User MIMO (future generations)

• Improved utilization of RF capacity

5. Use of 5 GHz spectrum

• More non-overlapping channels

• Quieter RF environment

22CONFIDENTIAL



Cons of 11ac

• ???

23CONFIDENTIAL



Wave 2 of 11ac

• Max 5GHz radio throughput triples again!

• 450 (11n 3x3 HT40), 1,300 (11ac 3x3 VHT80), 3,467 (11ac 4x4 VHT160)

• What will wave 2 802.11ac deliver?

• MU-MIMO

• Use AP MIMO resources more effectively

• Transmit data to multiple devices simultaneously: for example 4SS

AP streaming data to four 1SS clients simultaneously

• 4x4:4SS

• Benefit of additional stream mostly for MU-MIMO

• Not anticipating any 4x4:4SS client devices

• Adds 33% to max datarate

• VHT160

• Doubles max datarate

• Practical problem: only 2 VHT160 channels available in entire 5GHz

band

• When will it be available?

• Radio chipsets available late 2014

• Products in 2015

24CONFIDENTIAL



Wave 1 1SS

Wave 1 2SS

Wave 1 3SS

Wave 21SS

Wave 22SS

Wave 23SS

Wave 24SS

20 MHz 96.3 192.6 288.9 96.3 192.6 288.9 384

40 MHz 200 400 600 200 400 600 800

80 MHz 433 867 1,300 433 867 1,300 1,730

160 MHz N/A N/A N/A 867 1,730 2,600 3,470

Maximum Data rate for wave1 and wave 2 11ac

25CONFIDENTIAL



802.11ad and what it means

• 60GHz band, three channels in most countries (each 2.16GHz

wide), each providing up to 6.8Gbps PHY datarate

• No MIMO

• Challenges: Non-Line of Sight (NLOS) connections, range,

penetrating obstacles (and people)

• Targeted to clean up a cluttered desk or TV cabinet

• Likely not appropriate for traditional AP use. But can be interesting

for related applications like wireless docking, high-capacity WLAN

hotspots, AP backhaul/aggregation, etc.

• It is being investigated (but no product plans as of yet)

• Standard is available, certification program in place

• Wi-Fi Alliance WiGig Alliance

Aruba solution

28CONFIDENTIAL



802.11n/11ac Product Line

Performance

Price

103 Series

802.11n

Dual radio

2x2:2SS

Entry level

Low Density

220 Series

802.11ac

Dual radio

3x3:3SS

Highest

Performance

AP-274/275

802.11ac

Dual radio

3x3:3SS

Highest

Performance

Cost

Perf

orm

an

ce

200 Series

802.11ac

Dual radio

2x2:2SS

Mid

Density/Perf

29CONFIDENTIAL



AP-224/225 802.11ac 3x3 AP

• Enterprise class 3x3 802.11ac

• Aggregate TCP platform throughput performance >1Gbps

• Two platform models:

– AP-224: external antennas (3x, dual band)

– AP-225: integrated antennas

– “Advanced Cellular Coexistence” support

• Dual radio:

– 802.11n 3x3:3 HT40 2.4GHz(450Mbps), support for “TurboQAM”

– 802.11ac 3x3:3 HT80 5GHz (1.3Gbps)

– 11ac beamforming supported in both bands

• Wired interfaces

– Network: 2x 10/100/1000Base-T Ethernet, with MACSec support

– USB 2.0 host interface, console port, DC power

• Will require 802.3at PoE (or DC power) for full functional operation

– Functional, but capabilities reduced when powered from 802.3af POE

• Enterprise temperature range, plenum rated, TPM

$1,295 U.S. List

30CONFIDENTIAL



AP-20x Mid-range Dual-radio 11ac AP

• Low cost dual radio 11ac enterprise AP for medium density deployments

– 2x2 radios, no plenum rating, reduced max operating temperature (+40C)

• Both Instant and Controller-based product variants

• Two platforms:

– (I)AP-204: external antennas (2x, dual band diplexed)

– (I)AP-205: integrated antennas (omni downtilt)

• Dual radio, 802.11ac 2x2:2 (867Mbps max at VHT80)

– SDM, CSD, STBC, MRC, LDPC, 11ac Transmit Beamforming

– Advanced Cellular Coexistence (ACC) support

• Platform:

– CPU: BCM53014A CPU (“Vega”), Radios: 2x BCM43520

– 128MB SDRAM, 32MB FLASH, TPM

• Wired interfaces:

– 1x Gb Ethernet, console port (RJ45), DC power, reset button

– No USB

• Power:

– DC or 802.3af POE, 12.5W max peak

• Mechanical:

– Metal back, plastic front, no vents

– Dimensions: 150mm x 150mm x 37mm (same as AP-103)

Target availability (FCS): Jun ’14 (AOS)

AOS target: 6.4.1Instant SW target: 4.2

31CONFIDENTIAL



Rate vs Range: AP-225 vsAP135

• AP-225 11n performance is considerably better than AP-135 -> up

to 5.35x

• AP-225 TCP down throughput @ 120ft 128Mbps

23%

23%

40%

5.35x

43% 39%

56%

3.32x

32CONFIDENTIAL



Single-Client TCP Peak Performance(1 x 3SS MacBook Pro)

0

100

200

300

400

500

600

700

800

900

DOWNSTREAM UPSTREAM BI-DIRECTIONAL

828

609 596

Aruba AP-225

Aruba AP-225

33CONFIDENTIAL



Multi-Client TCP Performance(20 x 2SS MacBook Air, 1500-Byte)

350

360

370

380

390

400

410

420

DOWNSTREAM UPSTREAM BI-DIRECTIONAL

378

384

415

Aruba AP-225

Aruba AP-225

34CONFIDENTIAL



Small Packet Multi-Client Performance(20 x 2SS MacBook Air, Downstream UDP)

0

50

100

150

200

250

300

350

256-BYTE 512-BYTE

159

312

Aruba AP-225

Aruba AP-225

35CONFIDENTIAL



Antenna Gain: 5 dBi

2G: 3x3:3 11ac (2.4 GHz)

5G: 3x3:3 11ac (5.15 to 5.875 GHz)

11ac Beamforming

Conducted Tx Power

2G: 23 dBm per branch (27.7

aggregate)

MAX EIRP = 36 dBm

5G: 23 dBm per branch (27.7

aggregate)

MAX EIRP = 36 dBm

Power Interface: AC and 802.3at (PoE+)

Power Consumption: 23 W

WAN + LAN Port

Advanced Cellular Coexistence

IP66 and IP67

-40° to +65°CNo Heater. Start and operate.

AP-270 Series

35

36CONFIDENTIAL



• Unit does not look like radio

• Omni antennas are fully integrated in the chassis

• Resembles video cameras and light fixtures

• Multiple Bracket Options

AP-275: Campus Access / Outdoor Retail

36

8.5”

37CONFIDENTIAL



Advanced Cellular Coexistence

• Proliferation of DAS and new LTE bands at 2.6 GHz are

creating issue for Wi-Fi solution

• All new APs introduced by Aruba in the last 12 months and

going forward have implemented significant filtering into

the 2.4 GHz radio portion to combat this

• Design solution

– Use high-linear LNA followed with a high-rejection filter to achieve rejection target and

little sensitivity degradation;

– Design target: Minimal Sensitivity degradation with -10dBm interference from 3G/4G

networks (theoretical analysis).

38CONFIDENTIAL



11ac Controller Support

Performance

Sc

ale

CAMPUS

LARGE OFFICE

320032 CAP/128 RAP

2K Users3 Gbps Firewall

340064 CAP/256 RAP

4KUsers4 Gbps Firewall

3600128CAP/512 RAP


7210512 CAP/512 RAP


M3512 CAP/1024

RAP8K Users

20 Gbps Firewall

72201024 CAP/1024 RAP


72402048 CAP/2048 RAP


700516 APs

1k Users2 Gbps Firewall

701032 APs


703064 APs


39CONFIDENTIAL



Over Subscription: Customer scale points

• Large Software company

– 20,000 APs

– 55,000 users

– Never exceeded 12 gbps combined throughput

• Medium Sized US University

– 2,000 APs

– 12,500 Students

– Never exceeded 6 gbps combined throughput

Deploying 11ac

41CONFIDENTIAL



AP Uplink Considerations

• Assess the environment: Brownfield vs. Greenfield

• 2 x Ethernet/LAG cables is NOT a requirement for wave 1 11ac

• For a Greenfield environment (new building), laying out 2 x Ethernet cables makes it future proof

• For a Brownfield environment (an existing site with 1 x Ethernet cable), you don’t loose anything

• TODAY – 2 x Ethernet cables are used by a few customers• salt and pepper designs – PoE

redundancy

42CONFIDENTIAL



AP 225 Switch Considerations

AP 225 802.3af 802.3at

2.4 GHz radio 1x3:1 3x3:3

5 GHz radio 3x3:3 3x3:3

Ethernet ports 1 2

USB Disabled Enabled

• af vs. at: What does it really mean• Most 2.4 GHz only devices are single stream• 2.4 GHz has limited throughput already due to 20 MHz

channels• Improved amplifiers and advanced filtering require a little

more power• Ensure minimum 1 Gbps uplink ports for the APs

• Ensure 10 Gbps uplink from edge switches to core

• One 11ac AP can max out a 1 Gbps uplink on a switch

43CONFIDENTIAL



AP Replacement Considerations

• If the existing 802.11n network was designed for capacity then 1-for-1 AP replacement with 802.11ac AP is viable.• Capacity = APs that are 2500 sq.ft apart

• If the existing network is designed for supporting• 802.11 a/b/g• Or a coverage only 802.11 n

• Redesign will be required

• Redesigning might includes a combination of both physical and virtual survey.• Depending on the environment

44CONFIDENTIAL



AP Forwarding Mode Considerations

• All forwarding modes are supported

• Tunnel mode is the preferred forwarding mode in most situations

• For high performance using tunnel mode – enable Jumbo frames to support the increased AMSDU• Expect a 10 – 15 % drop in

performance without jumbo frames

• D-Tunnel mode can be used to achieve high performance

45CONFIDENTIAL



11n + 11ac co-existence & Channel Considerations

• 11n + 11ac = No problem

• Assuming HD deployments (APs are 45 feet apart)

• 80 Mhz – Use DFS or CSR• 40 Mhz – 802.11n compatibility modes to avoid client driver issues • 20 Mhz - 802.11a and 802.11n NON-DFS environments

• Assuming Ultra HD deployments (APs less than 45 feet apart): Use one of

the following• Consider using 20 MHz channels to get more re-use• Tx power considerations, and use of CSR (available 6.3.1.3) should be

considered to avoid CCI• Use of DFS as appropriate

46CONFIDENTIAL



Transmit Power Considerations

• Assess the environment• How much are my AP’s able to hear each other?

• Modern offices (hoteling environments) – a lot• Traditional offices (lots of offices) and K12 classrooms – Not as much• Universities there is a mixture of both – Variable

• How much is “too much”• If the Rx channel busy is > 30% during slow time• It is due to ACI and CCI• This has a direct impact on performance; worsens during peak hours

• What is the solution – Tx power on AP’s, high data rates on clients and low ACI/CCI• Guidance

• For modern offices• Min EIRP – 9 dBm; Max EIRP – 12 dBm

• For Traditional offices• Default (Min EIRP – 9 dBm; Max EIRP – Max)

• For environments that are a mix• Default (Min EIRP – 9 dBm; Max EIRP – Max)

• Set 802.11a basic and beacon rate to 24 Mbps; 802.11g basic & beacon rate to 12 Mbps to avoid CCI/ACI and increased channel utilization

47CONFIDENTIAL



Profile level Configuration Cheatsheet

Profile Configuration Summary

RF Management Profile Power:

Min – 9, Max – 12 for modern offices

Min – 9, Max – max for traditional offices

Min – 9, Max – max for mixed environment

Measure Rx channel busy during slow time in all cases

Channel

Use 40 MHz (if you want a slow migration)

Use 80 MHz (Max performance) (DFS needs to be

enabled for re-use)

Use 20 MHz channels for APs closer than 30 feet (for ultra

HD deployments

Use CSR - set to 25 or 30

48CONFIDENTIAL



Profile level Configuration Recommendations

Profile Configuration Summary

SSID Profile 802.11a basic & beacon rate- 24 Mbps

802.11g basic & beacon rate – 12 Mbps

HT-SSID Profile Default settings

VHT Profile Default settings

49CONFIDENTIAL



Summary of Recommendations

• AOS 6.3.1.7 or newer

• Enable end-to-end jumbo frame support if in tunnel mode

• Adjust TX powers based on type of site

• Adjust beacon and basic rates

• Set AMSDU to 3 for BE,BK and VI under Ht-SSID Profile.

50CONFIDENTIAL



The Planning Process

• VisualRF Plan (Virtual site survey):

– VisualRF Plan is the Aruba pre-deployment site planning

tool.

– Covers most standard deployments

– Outdoor, warehouse, non-standard environments may need

extra work

• Physical site surveys:

– Best way to characterize the RF propagation of a given

facility

– Time consuming

– Costly

51CONFIDENTIAL



RF Planning recommendations

• Consider using 80 MHz

channels in a 5-channel plan

– ARM will manage primary 20 and 40

MHz channel selections

– Will require use of 3 DFS channels

• All 11n Tx power

recommendations continue2

1

3

4

5

2

1

3

4

5

2

1

3

4

5

ClientMatch

53CONFIDENTIAL



ClientMatch™ Enables 802.11ac Wi-Fi

Match to

another AP

DEVICE TYPE INTERFERENCELOCATION CONGESTION

REAL-TIME RF CORRELATION

Enables use of

802.11ac Wi-Fi rates

98% of mobile devices

with higher signal quality

94% better performance

for “sticky” clients

No client-side software

required

Patent:

8,401,554

54CONFIDENTIAL



ClientMatch for Link & Traffic Optimization (L2-3)

55CONFIDENTIAL



RF Performance Aruba OS Dashboard

56CONFIDENTIAL



AOS 6.3 RF support

ClientMatch on by default

ClientMatch will override Band Steering, Spectrum

load balancing, and Station handoff .

a/b/g only 11n 11ac (AP-225)

ClientMatch No impact Supported Supported

Band steering Supported Supported* No impact

Spectrum load

balancing

Supported Supported* No impact

Station handoff

assist

Supported Supported* No impact

57CONFIDENTIAL



Sticky client impact on the network

• Simple example

– 1 user connecting at 6 Mbps and 9 users at 130 Mbps

– If they each download a 10 MB (80 Mb) file

• 6 Mbps is ~5 Mbps useful

• 6 Mbps connection takes 16 seconds

• 130 Mbps is 85 Mbps useful

• 130 Mbps takes 0.94 seconds

– So 16 + 9*0.94 = 24.5 seconds for 800 Mb ~32.5 Mbps

versus 85 Mbps for all users connecting at 130 Mbps.

• This is exacerbated in built out networks as one

slow user will affect all APs and clients that can

hear it

58CONFIDENTIAL



Preparing your wired network for .11ac

• Ensure minimum 1 Gbps uplink ports for the APs

• Ensure 10 Gbps uplink from edge switches to

core

– One 11ac AP can max out a 1 Gbps uplink on a switch

59CONFIDENTIAL

