CCNA Wireless From Net Workers

8/14/2019 CCNA Wireless From Net Workers

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2006, Cisco Systems, Inc. All rights reserved.esentation_ID.scr

2008 Cisco Systems, Inc. All r ights reserved. Cisco Public 1BRKCRT-110514365_04_2008_c2


CCNA Wireless:A New Associate LevelCareer Path Enhancement

BRKCRT-1105


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Agenda


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!


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.


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


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


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


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.


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


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


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


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


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


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


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


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


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


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+


802.11 Frame Shape


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Other WirelessTechnologies


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


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


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


Controller Redundancy DesignsN+1


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AP Mode: Wireless > Access Points >All APs > Detail


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


Cisco Wireless Mobility Anchor


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Controller Web ConfigurationWizard Login


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


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


Security


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WCS Administration


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


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.


Location Appliance

WCS with Location and Location appliance accuracy

10 meter 90% and 5 meter 50%


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Controller Configuration


Generate Proposal


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The Alarm Dashboard

Refreshes every 15 seconds

Three levels:

Minor

Major

Critical


WCS Database Backup


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Isolating the Problem


Design and Site SurveyConsiderations


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Non 802.11 Interferers

20 Mhz 20 Mhz

802.11 a or gOFDM

802.11 bDSSS


WLAN Coverage and Capacity


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Access Point Placement for Location


Multi-Floor Coverage


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Site Survey Tools


WCS Client Troubleshooting Tool


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Third Party Tools: Sniffers


Third Party Tools: Scanners


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Q and A


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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BRKCRT-1105

CCNA Wireless From Net Workers

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