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Successful Wireless LAN Implementation It’s all about Consistency and application delivery. Gartner’s Enterprise WLAN Product Evolution: Meru is 4 th Gen Leader. 3 rd Centralized. 4 th Traffic-Optimized. 2 nd Stand-Alone. 1 st Pre-802.11. 2000-2002. 2005-2006. 2003-2004. Coordinated - PowerPoint PPT Presentation
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Successful Wireless LAN Implementation
It’s all about Consistency and application delivery
Gartner’s Enterprise WLAN Product Evolution: Meru is 4th Gen Leader
2nd
Stand-Alone4th
Traffic-Optimized
Core controllers Edge controllers Overlays
Coordinated Single-span channels
3rd
Centralized2003-20042000-2002 2005-2006
Source: Gartner
Central ManagementSecurity
Cisco 1200+SWANSymbol
Aruba, Trapeze, Airespace …
Meru Networks
RF IntelligenceHigh DensityQoSZero Handoff
Cisco 350ORiNOCO
RoamAbout
Basic Connectivity
1st
Pre-802.11
Serv
ice s
/ Sc
a le
Meru is Visionary with 4th Generation WLAN
Source: Gartner Dataquest (September 2006) As of September 2006
challengers leaders
Cisco Systems
Symbol TechnologiesAruba NetworksMeru NetworksTrapeze Networks
Nortel Networks3Com Bluesocket
HP ProcurveSiemens
Extreme NetworksFoundry Networks
ExtricomXirrus
Enterasys Networks
AlcatelColubrius
niche players visionaries
abili
ty t
o ex
ecut
e
completeness of vision
2006-2007 change
Broad Market AdoptionSample Customers
Higher Ed & K-12
Government
Healthcare Enterprise
EducationIndustrial & Retail
Meru Networks Confidential
Meru Networks Solution Ecosystem
Clients & ApplicationsInfrastructure Security
New Wireless LAN Existing Wired Network, PBX, Security
End Users Demand: Guaranteed Delivery For Real-World mission critical Applications
NEW
APPS
WORKFLOW
INVENTORY
WEB
EMR
VOIP
Future Apps
ASSET
TRK
TEACHING
TRADING
VIDEO
Strategic Applications
Wi-Fi GettingEmbedded in
Variety of Devices
Delivering Consistency (Wi-Fi vs. Wired)
On the Wire it is pretty straightforward High Performance L2/L3 switches are a
commodity- Hubs, 10M Switches, 100M Switches, Gig Switches, - CAT5, CAT6, Fiber, etc……- QoS Capabilities are mature - Adding additional capacity is easy
More switches = more capacity But What about Wireless?
There are Inherent Challenges to consistent (Application) Delivery …
Wi-Fi basics and issues
802.11 Standards: 11b – 11M, 2.4G Band, 3 channels 11g – 54M, 2.4G Band, 3 channels 11a – 54M, 5G Band, 11 Channels 11n – 300M, both 2.4G and 5G Bands
Over the Air Challenges: QOS: Application Delivery & Consistent
Performance Complex Channel planning, Site Surveys Sticky Clients, Slow Clients Ping – Pong effect Roaming
Most Popular
Wi-Fi basics
There are 3 channels(Ch 1, 6, 11)
1
6
11
6
6
11 11
154Mbps 1Mbps
11
11
1
How WiFi Works – The Problem
Packet
Ack
Packet
wait
random backoff
Retransmission
1. Collisions are common and costly
2. AP doesn’t get more access to channel
3. More devices mean more collisions
4. Only AP is wired
1/3 access1/10 accessto channel
Meru Air Traffic Control TechnologyPredictable Performance with Density
20-25
Tota
l Ban
dwid
th a
t Pea
k (M
bps) 5
8
11
1
3
ContentionLoss
Today’s APPerformance
Meru AP Performance
Active Users Per AP
Others Meru
20-25
100+
Number of Active Users
Peak Aggregate Throughput
The only way to get good performance is to limit the number of devices
Predictable and Better End User Experience
Predictable, uniformly fair throughput across all clients
Throughput 1 AP + 20 Clients Throughput 1 Meru AP + 20 Clients
WLANs Rely on Client to Make Decisions
There are 3 non-overlapping channels in 2.4GHz (Ch 1, 6, 11)
1
11
6
Client selects AP based on luck and signal strength
The client doesn’t know which AP is truly the best selection24 users
90% bandwidth
4 users15% bandwidth
1 users2% bandwidth
Co-Channel Interference and Sticky Clients
There are 3 channels(Ch 1, 6, 11)
1
6
11
6
6
11 11
1
Designed for 54Mbps
54Mbps 1Mbps
Signal reaches much further
Co-channel interference is inevitable
11
11
1
Client connects at 54 Mb
Client still connected at 1 Mb
Meru Solution: The Network Makes the Decisions
Virtual CellAll Channel 1
Controller
1. Network in charge
1
1
1111
11
2. Best choice AP3. Zero time
handoff4. Full power APs5. Simple deployment
Why Customers Choose Meru Over Legacy Solutions
Switch-like: Better Performance and Scale Predictable performance and fair access to clients Improved performance in mixed 802.11b/g networks Toll-quality Voice Improved Mobility / Zero-Handoff
Single Channel: Lower Costs of Deployment and Operations Reduced need for site-survey, channel planning Less APs to deliver same application performance Lower operational complexity, leading to lower personnel
cost
Virtual Cell: Best Architecture for the Future - Scaling capacity with 802.11 a/b/g Migrating to 802.11n Deploying greenfield 802.11n
Promise of 802.11n
Improved coverage through multipath and MIMO; multiple
transmit and receive paths
Better coverage
Longer range: Over 2 times better than 802.11a/g *
Longer range
Over 6 times better than 802.11a/g *
Higher throughput
More resistant to interference and loss due to multipath *
More reliable
* Based on specifications in the standard.
2x2, 3x2, 2x3, 3x3, …
What does this mean? Number of Chains = Number of Antennas
used at any one time Not Number of Spatial Streams!
- Number of Spatial Streams = 2 or less, always
3x_ _x33 Tx Antennas3 Rx Antennas
Standards Adoption: 802.11 b -> a/g - >n
2000 2004-7 2007….M
bps
per
cell
Application Casual usage Networks of
Convenience Conference Rooms
Limited applications in mobile workforce organizations
Healthcare, Education Retail, Manufacturing
Pervasive, business-critical deployments
Support high-bandwidth applications
All Wireless Offices
300
Architectural ConsiderationsFlexible 3-Tier Traffic Distribution System(3TDS)
DP’sController Controller
DP DP DP DP
Access Point (AP)Distribution Point (DP)Controller
Meru Centralized Model Meru Distributed Model
: Control Traffic: Data Traffic
11n AP 11n AP 11n AP 11n AP 11n AP 11n AP 11n AP 11n AP 11n AP 11n AP 11n AP 11n AP
Options
21
CH 1
CH 1
CH 6CH 11
Design Considerations Lack of Site Planning Tools Channel Planning
Challenges Migration of infrastructure
from .11a/g to .11n Two Different channel plans
for 2.4 and 5 GHz using same AP chassis
Increase in interference with Increase in range
PoE 802.3af Simplifying deployment &
operations Optimizing capacity and
scalability Impact on wired switching
infrastructure
Meru WLAN ProductsSimple Deployment Architecture
Floor 2
Floor 1
Data Center
L2 / L3Backbone
Virtual AP
AP
AP
Meru Controller
Meru AP Coordinated Access Point► Air Monitor + Access Point ► Application Flow Classification► Contention management
Controller► Centralized appliance for
coordination, management and security
► Built-in application Flow-Detectors e.g. SIP, H.323, Spectralink SVP
Certified Voice Solutions
Nokia E61Dual-mode phone
PSTN
Ascom PortableDevice Manager (PDM)
Meru WLAN Controller
Meru AP 201
Ascom i75 Handsets
AVAYA 3631
Hitachi-CableWIP-5000
Outside Enterprise Inside Enterprise
Cellular Network
Channel 1 VirtualCell
T1 / PRI
AVAYA SES (SIP)
AVAYA S8300/G700Communication Manager Example Deployment Options:
Industrial/Healthcare Applications
Ascom i75, Avaya 3620
Basic WiFi VoIP Handset WIP-5000Full-featured Office VoIP Handset
AVAYA 3631
Mobile, Multi-site Worker Nokia E61SIP PB
X Meru AP 201
AVAYA 3620
Meru AP Family PositioningB
andw
idth
RS4000
AP150
AP300family
Single Channel, Ease of Deployment
Medium scaleData +Voice
High CapacityData + Voice
High Client BandwidthData + Voice
AP150 family
AP200family
OAP180outdoor
Controller Family Positioning
1-5 15 ………………………150 200…………….1000
Remote / Small Office
Medium EnterpriseBranch Office
Large Enterprise
Number of Managed Access Points
MC500
MC1000
MC3000
MC50006U (5-slot)
Manages Access Points and Radio Switches
Simple configuration WLAN security
enforcement Coordinates QoS policies
and manages contention Ensure seamless client
mobility across subnets
Redundant configurations available
Meru AirShieldTM Addresses Unique WLAN Security Requirements
Application Security Application Firewall: Packet-Signature
Per-User Firewall Asset Tracking & Reporting
Intrusion Detection &Protection
AirFirewall security* Rogue detection and
mitigation IDS/IPS
Authorization, Isolation &Control
Guest Access GRE tunneling MAC filtering, VLAN control NAC/NAP
Authentication & Encryption
802.11i, WPA2, WPA 802.1x/EAP, Two-factor
*201/208 only
Centralized Management and Visualization Simplifies Operations and Improves Productivity E(z)RF Application Suite
Locate
Visualize AP Coverage Locate Rogues
Monitor Performance Advanced Location MappingManage
Monitor
Deploy
State University of New York, Morrisville First 802.11n campus wide deployment
Profile Located in rural upstate NY comprise of 30+ buildings Offers more than 70 degree options to > 3200 students Tech savvy, IBM ThinkPad University, campus-wide wireless
initiative includes campus wide Nextel phone
Challenge Replace EOL’d legacy wireless network and plan for high density
future usage 100% mobile teaching and learning environment Support secure, converged data, voice and video High-performance, high density, everywhere
Solution 900 Meru AP300 access points with two a/b/g/n radios and
MC5000 Controllers 802.11i standard security Results “Some of the statistics from tests were just unbelievable.
In general, speeds were five times that of 11g.” - Jean Boland, vice president of technology services
Summary: Customers Trust Meru to Deliver in the Most Challenging Deployments Largest Deployment with No RF Planning
2.5 Million Square Feet 3000+ APs on a single channel
World’s Largest Enterprise WLAN Deployment
24,000 radios deployed in 200+ buildings; 30,000 radios by Sep, 2007; 250,000 students
Innovative, all-wireless teaching environment at Microsoft School of the Future with 600 Mbps of wireless capacity at every location
Highest user density production deployment 100+ active users/AP Completely wireless teaching/testing environment
Largest Enterprise FMC dual-mode phone deployment
6000+ phones, 8000+ laptops; all-wireless 49 offices