ccna wireless from net workers
TRANSCRIPT
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CCNA Wireless:A New Associate LevelCareer Path Enhancement
BRKCRT-1105
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Agenda
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Agenda
Overview
Market Analysis
CCNA as Prerequisite
Introducing the New Certification
What Is Covered
Sample Course Slides Q and A
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What We Will Cover
It is impossible to cover all topics for theCCNA-Wireless certification in a two-hour session
Session is not about cover all CCNA-Wirelessknowledge in two hours
We will provide:
Background
Overview
Sample course slides
We will not teach to the slides This is a sneak preview of the new curriculum!
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Disclaimer
We may not be able to address your specific question
If you have taken the exam please refrain from askingquestions from the exam
We will be available after the session to direct you toresources to assist with specific questions or toprovide clarification
This Session Will Strictly Adhere to the CiscosRules of Confidentiality
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The Global IT Talent Gap Challenge
EvolutionoftheNetwork
Time
Voice Transport
Telecommuting / VPN
Wireless
Web 2.0 Apps
Unified Communications
IP Video, TelePresence
Enhanced Security
Switching
Routing
Storage
Role of the Network Grows
KnowledgeGap
Converged Solutions
50% of Security issecure routers.
35% of Voice isrouter-embedded.
Wireless is 15%
and growing
annually.
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Starting Salaries
$76,500
$30,337
$37,832
$39,448
$51,292
$52,009
$55,468Entry LevelNetwork Engineer
CCNA
Marketing
BusinessAdministration
Computer Science
Electrical Engineer
Liberal Arts
Source: National Association of Colleges and Employers, 2005
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CCNA(Associate 02 yrs)
CCNP
(Professional 25 yrs)
CCIE(Expert 5+ yrs)
Salary Over the Years
$76,500
$88,421
$116,906
Network Engineer(Associate 02 yrs)
Network Engineer(Professional 25 yrs)
Network Engineer(Expert 5+ yrs)
$55,468
$66,730
$80,369
Source: Certification Magazine, December 2006Salary Survey; TCPMag.com Internetworking SalarySurvey 2006-2007
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The Wireless IT Talent Gap Challenge
Gap in wireless skills isestimated to grow to342,000 persons by2009 (IDC analysis)
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CCNA Routing asa Prerequisite
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CCNP
CCNA as a PrerequisiteBefore May 2008
CCVPCCSPCCIPCCDP
CCDA CCNA
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CCNP
CCNA as a PrerequisiteToday and Future
CCVPCCSPCCIPCCDP
CCDACCNA
Voice
CCNA
Security
CCNA
Wireless
CCNA
Routing
CCNARouting
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Expanding Cisco Career Certifications:Releasing CCNA Wireless on July 25, 2008
Career Specialty
Security
IP Communications
Wireless
Storage Networking
Optical
Advanced Routingand Switching
Foundation
Expert:CCIER&S, SANS, SP,Security, Voice, Design
Professional:CCNP, CCIP, CCSP,
CCVP, CCDP
Associate:CCNA, CCDA,
NEW CCENT
Entry:CCENT
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Introducing CCNA-Wireless
Cisco recognizes the critical importance of Networking Associates/Administrators(or aspirants) involved in the configuration, implementation and support of wirelessLANs, particularly those built with Cisco equipment.
The CCNA-Wireless certification enables these experienced Wireless NetworkingAssociates/Administrators to be identified in the marketplace.
The CCNA-Wireless certification is a certification thatidentifies those with associate-level knowledge andskills in wireless networking.
It emphasizes wireless networking principles at theassociate level and recognizes expertise of wirelessprofessionals that have the knowledge to assessnetwork business requirements and can translate them
into technical specifications to be incorporated intosuccessful installations.
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How to Become CCNA Wireless Certified
CCNA-Wireless Course
5 Day ILT
CCNA-Wireless Exam
90 Minute Exam (#640-721)
Available globally - see Learning Locator CCNA is a prerequisite
(recommended 2+ years in Networking)
Multiple choice exam 75 minute duration Available globally via Pearson VUE
Passing earns CCNA-Wirelesscertification
CCNA-Wireless is an associate level credential withassociate level rules of engagement and benefits.
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CCNA-Wireless
Innovation in Networking Career Certification
Meets the needs of both employers and employees
Associate level recognition
Availability: July 25th, 2008
Program information:
www.cisco.com/go/ccnawireless
Preparation Information:
www.cisco.com/go/ccnawireless
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What Is Covered inthe CCNA-WirelessCourse and Exam?
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Gather and clarifywireless networkfunctional specifications.
Develop wirelessnetwork designs to meetfunctional specifications.
Develop animplementation plan.
Convey rationale for theinstallation.
ExampleDeliverables
CCNA-Wireless Sample Tasksand Deliverables
Design, Install, and Configure:
Cisco WLAN in SMB and Enterprise
installations
Example Tasks
Monitor and Conduct BasicTroubleshooting tasks of a:
Cisco WLAN in SMB and Enterpriseinstallations
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CCNA-WirelessJob Tasks Summary
1) Assist a professional in gathering site survey data
2) Implement assigned WLAN infrastructure devices
3) Configure a Cisco Wireless LAN Controller (WLC or Controller) tosupport light weight access points
4) Configure installed WLAN devices for operation
5) Implement Access Points
6) Tune WLC for WLAN operation
7) Integrate WLAN client devices
8) Configure Radio Resource Management
9) Given specific configuration tasks, configure mobility groups
Customers need comprehensive training on fundamentals of wireless networking to filljob roles of network administrator/associate, wireless technician or wireless support
specialist. Employers looking for validation of skills in wireless networking andhands-on experience with Cisco devices (industry leader in wireless LANs).
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The Value of CCNA-Wireless for theNetworking World
For Networking Professionals
Marketability: Level of Recognition in a New Field of Networking
Clarity: Differentiation on Cisco WLAN SMB and Enterprise installations
For Job Seekers
Potential: Clear, Long-Term, High-Value Development Path
Marketability: New Field of Expertise Focused on Wireless
For Corporations
Business Alignment: Identify, Develop, and Recognize Wireless Networks
Talent Management: Validate Skills and Retain Key talent
For System Integrators
Business Alignment: Clearly Differentiate Wireless Skills and Services fromother networking specializations
Talent Management: Identify, Develop, and Recognize Wireless NetworkingProfessionals
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What Is in theNew Course?
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EIRP
The transmitter generates power, the cable incurs loss, theantenna adds a gain which depends on the Antenna type
The Effective Isotropic Radiated power is the power (dBm) thatwould radiate an equivalent isotropic antenna
This value is regulated
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Fresnel Zone
Determines an areaaround radio line ofsight where reflectionshave most negativeimpact on the signal
Should be at least 60%free from obstacles
b = 0.5 x x d
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RSSI and SNR
RSSI is the signalstrength indicator
dBm valuetransformed from avendor dependentgrading coefficient
Usually negativevalue, the closerto 0 the better
SNR is signal strengthrelative to noise level
The higher the better
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dBi and dBd
dBi refers to anisotropic antenna
This doesnt exist in reality
Used as a reference point tocompare antennae together
The same log progressionapplies to dBi as to theother decibel scales
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dBd
dBd refersto dipole
The simplest antenna
Also called rubber duck
0 dBd = 2.14 dBi
The log scale isthe same as theother dB scales
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Antenna Principles
Radiation patterndescribescoverage shape
Made of E plane(elevation chart)and H plane(azimuth chart)
Expressedin dB
Each antenna
is different,directional,omnidirectional,patternshape, gain
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Spread Spectrum
Narrow band and spread spectrum arethe two main ways of sending a signal
Spread spectrum uses less energyat peak
The bandwidth required depends on theamount of information to send
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DSSS: Encoding
Each bit is transformed into a sequence, called chipor symbol
In this example, chipping code is called Barker 11
Up to 9 bits can be lost
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OFDM
Of 64 subcarriers:
12 zero subcarriers (In black) onsides and center
Side is frequency guard bandleaving 16.5 MHz occupiedbandwidth
Center subcarrier is zerofor DC offset/carrier leak rejection
48 data subcarriers (in green)per symbol
4 pilot subcarriers (in red) persymbol for
synchronization/tracking
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Channels and Overlap Issues
With channels built for 5 Mhz interchannel space, each DSSSchannel uses more than one channel
Only 3 or 4 non-overlapping channels are available in the ISMband, but up to 23 in the UNII band
Channel overlap can be co-channel interference or adjacentchannel interference
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The Wi-Fi Alliance
Wi-Fi Alliance certifiesinteroperability between products
Products include 802.11a, 802.11b, 802.11g, 802.11ndual band products, and security testing
Provides assurance to customers of migration andintegration options
Cisco is a founding member of Wi-Fi Alliance
Certified products can be found at http://www.wi-fi.com
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Regulatory Bodies
Each country or region defines its rules about theusage of the FC space:
Which frequencies are allowed (spectrums and channels)Which transmit powers are possible (transmitters and antennagain and EIRP)
How a wave can be sent in each frequency (modulation andencoding techniques)
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802.11 Standards for Spectrumsand Speeds
802.11 802.11b 802.11a 802.11g 802.11n
Ratified 1997 1999 1999 2003Not
Ratified
FrequencyBand
2.4 GHz 2.4 GHz 5 GHz 2.4 GHz2.4 GHz/5
GHz
No of Channels 3 3 Up to 23 3 varies
TransmissionIR, FHSS,
DSSSDSSS OFDM DSSS OFDM
DSSS/CCK/OFDM
Data Rates(Mbps)
1, 21, 2, 5.5,
11
6, 9, 12, 18,24, 36, 48,
54
1, 2, 5.5,11
6, 9, 12, 18,24, 36, 48,
54100+
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802.11 Frame Shape
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Other WirelessTechnologies
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ZigBee Networks
Not compatible with Wi-Fi
Use the ISM band and may interfere, usually low power
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Other Non 802.11 Interferers
Microwave Ovens
WirelessGame Controller
OutdoorMicrowave Links
WirelessHeadphones
Fluorescent Lights
Motion Detectors
RadarWireless VideoCameras
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WiMAX
Fixed WiMAX,based on 802.16d
Backbone usage,T1/E1 type of lines
Last mile usescable or Wi-Fi
Long range withhigh speed (50
miles, 70 Mbps)
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Cisco Unified WirelessNetworks Architecture
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CUWN Basics
Keeping configurations consistent is difficult
Monitoring the exact state of each access point and reacting to achange in real time is an issue
Coverage holes adversely affect service
Interference can be a factor
Coverage area will change with time:
Interference levels
Signal to noise ratioSignal quality & coverage
Throughput & load
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LWAPP Modes
LightWeight Access Point Protocol
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Controller Redundancy DesignsN+1
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AP Mode: Wireless > Access Points >All APs > Detail
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H-REAP in Connected Mode
Once an AP is configured as H-REAP, the Controller will inform the AP ofthe mode change through the WTP mode payload. The AP saves thisinformation in nonvolatile memory and boots with the new mode
In Connected mode, H-REAP traffic can be backhauled to the Controlleror locally bridged
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Client Roaming Across Subnetworks
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Cisco Wireless Mobility Anchor
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Controller Web ConfigurationWizard Login
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Cisco IOS-to-LWAPP Conversion Utility
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Configuring the MobilityExpress Solution
CNA was modified to supportCisco Mobility ExpressSolution
Cisco 521 Wireless Express stand-alone Access Points
Cisco 526 Wireless Express MobilityController andcontroller-mode 521 AP
CCA is a free application canbe downloaded from CCO
CCA installs onWindows system
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Aironet Site Survey Utility
Action / options
The utility gives you dynamicrepresentation of your connectionto the wireless network.It displays AP MAC address, channel,RSSI, noise level, SNR, speed ofyour connection.From this the connection quality isshown (green/excellent, yellow/good,orange/fair, red/poor).
From Action/enable proximity beeper, get adetection beep when getting closer to the AP.From Action/option, select what triggers theproximity beeper.
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Cisco Compatible Extension Explained
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Security
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WCS Administration
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WLAN Management Tools
Centralized locationfor managing devices
Management devices
WLAN controller
Controller-based accesspoints working with
Cisco WCS
Cisco WirelessLocation Appliance
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WCS Home Page
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Cisco WCS WLAN Planning
Allows for what if scenarios prior to installation of AP
Map Editor tool allows attenuation factors to be appliedto objects to modify RF prediction
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Location Tracking Using RFFingerprinting
RF fingerprinting traces signal strength for every signal heard by a Cisco AP in thenetwork, which will allow accounting for reflection and multipath.
Then a RF fingerprint is created from every point on the coverage map, whichallows Cisco WCS to accurately place an icon and create a probability color grid.
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Location Appliance
WCS with Location and Location appliance accuracy
10 meter 90% and 5 meter 50%
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Controller Configuration
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Generate Proposal
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The Alarm Dashboard
Refreshes every 15 seconds
Three levels:
Minor
Major
Critical
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WCS Database Backup
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Isolating the Problem
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Design and Site SurveyConsiderations
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Non 802.11 Interferers
20 Mhz 20 Mhz
802.11 a or gOFDM
802.11 bDSSS
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WLAN Coverage and Capacity
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Access Point Placement for Location
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Multi-Floor Coverage
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Site Survey Tools
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WCS Client Troubleshooting Tool
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Third Party Tools: Sniffers
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Third Party Tools: Scanners
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Q and A
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Recommended Reading
Continue your Cisco Livelearning experience with furtherreading from Cisco Press
Check the RecommendedReading flyer for suggestedbooks
Available Onsite at the Cisco Company Store
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