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© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

!"#$ v% Ch&'ter 71

Ch&'ter 7(

Im'lementing outing )&cilities *or+r&nch !**ices &nd obile -orers

CCNP ROUTE: Implementing IP Routing

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Ch&'ter 72© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Chapter 7 Objectives

/escribe the *und&ment&ls o* br&nch o**ice connectivity.

/escribe the *und&ment&ls o* mobile orer connectivity.

/escribe the necess&ry con*igur&tions *or & mobile orer

to connect to &n enter'rise netor.

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Ch&'ter 7© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Planning the

Branch OiceImplementation

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Ch&'ter 7© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Branch Oice Challenges

Common re3uirements th&t & br&nch netor design needs

to &ddress include connectivity, security, &v&il&bility, voice,&nd &''lic&tion o'timi4&tion.

#he ch&llenges hen &ddressing these re3uirements

include(

5 +&ndidth &nd netor re3uirements5 Consolid&ted d&t& centers

5 obility

5 /is'&r&te netors

5 &n&gement costs

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Branch Oice !esign Consi"erations

 Are&s &**ecting br&nch o**ice design include(

BranchRouting!esign

Connectivity#echnologies

esiliency

outingProtocols

Service i

Security &ndCom'li&nce

obilitye3uirements

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Ch&'ter 7%© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

The Thin Branch

#he 8thin br&nch9 is & trend th&t is incre&sing in 'o'ul&rity

&nd is mostly due to d&t& centers &nd br&nchconsolid&tions.

Services hich ere either 'rovided on servers or

&''li&nces c&n no be de'loyed on & Cisco IS including(

5 :oice5  A''lic&tion *ire&ll

5 Intrusion 'revention

5 :irtu&l 'riv&te netor

5 -A; o'timi4&tion

5 -ireless

5 -A; b&cu'

#his &''ro&ch h&s no im'&ct on end

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7© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Beneits o an I#R

ISs reduce costs by de'loying & single, resilient system *or

*&st, secure delivery o* multi'le mission

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=© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Cisco Bor"erless Net$or% &rchitecture

#he Cisco +orderless ;etor Architecture is b&sed on the

ne gener&tion o* Cisco IS >2 &nd en&bles & centr&lo**ice to e**iciently m&n&ge &ccess *rom multi'le loc&tions,

*rom multi'le devices, &nd to &''lic&tions th&t c&n be

loc&ted &nyhere.

5 #he Cisco +orderless ;etor Architecture is beyond the sco'e o*this ch&'ter.

Cisco '())* +())* an" ,()) series I#R -+

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?© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

.&N Re/uirements

#he ty'e o* remote site &lso in*luences -A; re3uirements.

)or e&m'le(5  A region&l site is more liely to re3uire 'rim&ry &nd b&cu' lins, ith

routing 'rotocols selecting the best '&th hile & br&nch site is more

liely use & :P; lin &nd st&tic routes.

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.&N Re/uirements

+r&nch o**ices c&n use diverse &''lic&tions including

mission

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11© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Branch Oice .&N Upgra"e #cenario

#his ch&'ter ill use the *olloing scen&rio(

5 #he +r&nch site(5 Provides b&sic services to its @A; users including /CP &nd ;A#.

5 Connects to the B using & 'riv&te -A; lin &nd de*&ult routes inected

into $I>P.

5 #he B site routes to the br&nch using $I>P.

Branch 01

Priv&te-A;

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.&N Upgra"e #cenario

edund&ncy ould &llo *or & more resilient br&nch

&rchitecture, there*ore the +r&nch site ill be u'gr&ded touse & second lin through the Internet.

#his second connection ill be 'rovided using & bro&db&nd

lin th&t ill be secured using &n IPsec :P;.

Branch 01

Priv&te -A;

Internet

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Ch&'ter 71© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Implementation Plan

1. /e'loy bro&db&nd connectivity

2. Con*igure st&tic routing

. /ocument &nd veri*y other services

. Im'lement &nd tune the IPsec :P;

6. Con*igure >$ tunnels

.Note:

5 #he im'lement&tion in this ch&'ter is not eh&ustive &nd other

solutions could &lso be &''lied.

5 #he *olloing is to serve &s & guide &nd &s ust one 'ossible solution

to routing to & br&nch site.

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Implementation Plan

'2 !eplo3 broa"ban" connectivit3

2. Con*igure st&tic routing

. /ocument &nd veri*y other services

. Im'lement &nd tune the IPsec :P;

6. Con*igure >$ tunnels

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Ch&'ter 716© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

!eplo3ing Broa"ban" Technolog3

#he choice o* &ccess netor technology &nd suit&ble

b&ndidth should be the *irst consider&tion &ddressed henconnecting & br&nch.

#his choice is ultim&tely &**ected by(

5 -h&t is loc&lly &v&il&ble.

5 #he cost o* the lin5 /&t& &nd voice re3uirements o* the business.

+ro&db&nd technologies 'rovide &l&ys

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Ch&'ter 71%© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Broa"ban" Technolog3 Options

#atellite broa"ban":

5  A s&tellite modem tr&nsmits r&dio sign&ls to & geosynchronouss&tellite &nd 'rovides & loc&l $thernet connection.

Broa"ban" cable access:

5  A s'eci&l c&ble modem se'&r&tes the Internet d&t& sign&l *rom the

other sign&ls c&rried on the c&ble &nd 'rovides & loc&l $thernetconnection.

!igital subscriber line 4!#56:

5  A s'eci&l high

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Ch&'ter 717© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

.ireless Broa"ban"

;e develo'ments in bro&db&nd ireless technology &re

incre&sing ireless &v&il&bility. Po'ul&r de'loyments include(

5 unici'&l -i

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unicipal .i8i

Some munici'&l

governments 'rovidemunici'&l ireless

netors.

#hese netors ty'ic&lly

'rovide high

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unicipal .i8i

;etors use & mesh to'ology r&ther th&n & hub

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Ch&'ter 720© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

.i&9

-iAD E-orldide Intero'er&bility *or icro&ve AccessF

is telecommunic&tions technology th&t 'rovides irelessd&t& over long dist&nces in & v&riety o* &ys, *rom 'oint

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Ch&'ter 721© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

.i&9 Components

 A toer th&t is simil&r in

conce't to & cellul&rtele'hone toer.

5  A single -iAD toer c&n

'rovide cover&ge to &n &re&

&s l&rge 7,600 s3u&re

ilometers E&''roim&tely,000 s3u&re milesF.

 A -iAD receiver th&t is

simil&r in si4e &nd sh&'e

to & PCCIA c&rd, or builtin to & l&'to' or other

ireless device.

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Ch&'ter 722© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

#atellite Internet

#o

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Ch&'ter 72© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

T$o$a3 #atellite Internet S&tellite services deliver d&t& &t donstre&m s'eeds u' to 1,600 b's,

&nd u'stre&m s'eeds &s high &s 126 b's.

5 e&vy &ctivity on the netor c&n &**ect s&tellite s'eeds.

 Asymmetric&l n&ture o* s&tellite communic&tion does not lend itsel* ell

to voice &''lic&tions.

#he dist&nce beteen the subscriber &nd the orbiting s&tellite c&uses

issues ith del&y

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Ch&'ter 72© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Broa"ban" Cable

+ro&db&nd c&ble is & 'o'ul&r o'tion used by teleorers to

&ccess enter'rise netors.5  Although this solution still is not 'o'ul&r *or connecting br&nch sites, it

should nonetheless be considered &s the technology m&tures.

#he c&ble system uses & co&i&l c&ble th&t c&rries r&dio

*re3uency E)F sign&ls &cross the netor. Co&i&l c&ble is the 'rim&ry medium used to build c&ble #:

systems.

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Ch&'ter 726© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

0istor3 o Cable Technolog3 C&ble television &s *irst em'loyed in

&h&noy, Pennsylv&ni& in 1?= by Gohn

-&lson.5 e oned &n &''li&nce store &nd needed

to solve 'oor over

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o"ern Cable #3stem

odern c&ble systems 'rovide to

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Ch&'ter 727© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Cable 8re/uencies

"'stre&m *re3uencies &re in the r&nge o* 6 4 to 2 4.

/onstre&m *re3uencies &re in the r&nge o* 60 4 to =%04.

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Ch&'ter 72=© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Broa"ban" Cable Components #here &re to ty'es o* e3ui'ment re3uired on & c&ble system(

5 C&ble modem termin&tion system EC#SF &t the c&ble o'er&tor end.5 C&ble modem ECF on the subscriber end.

 A C#S communic&tes ith Cs loc&ted in subscriber homes.

5 #he he&dend is &ctu&lly & router ith d&t&b&ses 'roviding Internet

services to c&ble subscribers.

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Ch&'ter 72?© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

Broa"ban" Cable

In & modern )C netor, ty'ic&lly 600 to 2000 &ctive d&t&

subscribers &re connected to & c&ble netor segment, &llsh&ring the u'stre&m &nd donstre&m b&ndidth.

-hen high us&ge c&uses congestion, the c&ble o'er&tor

c&n &dd &ddition&l b&ndidth *or d&t& services by &lloc&ting

&n &ddition&l #: ch&nnel *or high

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Ch&'ter 70© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

!igital #ubscriber 5ine 4!#56

/S@ is & *&mily o* bro&db&nd technologies th&t 'rovides

digit&l d&t& tr&nsmission over the ires o* & loc&l tele'honenetor.

5 /S@ service is delivered simult&neously ith regul&r tele'hone on the

s&me tele'hone line.

It h&s become &n e**icient &nd e**ective o'tion *or cor'or&teInternet &ccess.

Note:

5 /S@ ill be used &s the solution *or the br&nch o**ice scen&rio.

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!#5 Bac%groun" Inormation

In the e&rly 1?=0Hs, rese&rch by +ell @&bs identi*ied th&t &

ty'ic&l voice convers&tion over & 'l&in old tele'hone serviceEP!#SF loc&l loo' only re3uired the use o* *re3uencies in

the r&nge o* 00 4 to 00 4.

5 )or ye&rs, the b&ndidth gre&ter th&n 4 ent unused.

) +) %0; ' 0;

Not to scale

,)) 0; ,2< %0; '

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!#5 Bac%groun" Inormation

 Adv&nces in technology &llo /S@ to use the &ddition&l

b&ndidth *rom 4 u' to 1 4 to deliver high

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!#5 =ariants

#here &re m&ny v&ri&nts o* /S@ th&t &re distinguished by

their n&ture, m&imum d&t& r&te, d&t& &nd voice su''ort,line coding technology &nd m&imum dist&nce.

!#5 =ariants > Naturea?imum !ata Rates

E/onstre&m J "'stre&mF

 A/S@

EAsymmetric /S@F Asymmetric = b's J 1 b's

/S@

Ehigh bitr&te /S@FSymmetric 2 b's J 2 b's

S/S@

ESymmetric /S@ FSymmetric 2 b's J 2 b's

S/S@

ESingle

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Ch&'ter 7© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

&s3mmetric !#5 4&!#56 8re/uencies

 A/S@ is the most commonly inst&lled v&riety o* /S@.

5 "'stre&m *re3uencies &re in the r&nge o* 20 4 to 1= 4.5 /onstre&m *re3uencies &re in the r&nge o* 12 4 to 1 4.

Upstream

&!#5

) +) %0; ' 0;

Not to scale

,)) 0; ,2< %0;

!o$nstream &!#5

'

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Ch&'ter 76© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

&!#5 Inrastructure

 A/S@ is not & com'lete end

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Ch&'ter 7%© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public

&!#5 Inrastructure

 A /S@ Access ulti'leer E/S@AF is b&sic&lly &n A#

sitch cont&ining /S@ inter*&ce c&rds EA#"

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&!#5 E?ample

#he A/S@ @&yer 1 CP$ connection termin&tes &t the

/S@A.

5 #he d&t& lin l&yer 'rotocol th&t is usu&lly used over /S@ is A#.

#he /S@A termin&tes the A/S@ connections, &nd then

sitches the tr&**ic over &n A# netor to the service

'roviderHs core &ggreg&tion router.

!#5&

5ocal 5oop

#ervice Provi"er Net$or%

&T

Core Router 

!0CP#erver 

InternetBranch

CPE