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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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Ch&'ter 76© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
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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10© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
.&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 $I>P.
Branch 01
Priv&te-A;
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12© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
.&N Upgra"e #cenario
edund&ncy ould &llo *or & more resilient br&nch
&rchitecture, there*ore the +r&nch site ill be u'gr&ded touse & second lin through the Internet.
#his second connection ill be 'rovided using & bro&db&nd
lin th&t ill be secured using &n IPsec :P;.
Branch 01
Priv&te -A;
Internet
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Ch&'ter 71© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
Implementation Plan
1. /e'loy bro&db&nd connectivity
2. Con*igure st&tic routing
. /ocument &nd veri*y other services
. Im'lement &nd tune the IPsec :P;
6. Con*igure >$ 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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Ch&'ter 71© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
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 $thernetconnection.
!igital subscriber line 4!#56:
5 A s'eci&l high
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Ch&'ter 717© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
.ireless Broa"ban"
;e develo'ments in bro&db&nd ireless technology &re
incre&sing ireless &v&il&bility. Po'ul&r de'loyments include(
5 unici'&l -i
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Ch&'ter 71=© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
unicipal .i8i
Some munici'&l
governments 'rovidemunici'&l ireless
netors.
#hese netors ty'ic&lly
'rovide high
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Ch&'ter 71?© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
unicipal .i8i
;etors use & mesh to'ology r&ther th&n & hub
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Ch&'ter 720© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
.i&9
-iAD E-orldide Intero'er&bility *or icro&ve AccessF
is telecommunic&tions technology th&t 'rovides irelessd&t& over long dist&nces in & v&riety o* &ys, *rom 'oint
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Ch&'ter 721© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
.i&9 Components
A toer th&t is simil&r in
conce't to & cellul&rtele'hone toer.
5 A single -iAD toer c&n
'rovide cover&ge to &n &re&
&s l&rge 7,600 s3u&re
ilometers E&''roim&tely,000 s3u&re milesF.
A -iAD receiver th&t is
simil&r in si4e &nd sh&'e
to & PCCIA c&rd, or builtin to & l&'to' or other
ireless device.
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Ch&'ter 722© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
#atellite Internet
#o
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Ch&'ter 72© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
T$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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Ch&'ter 72%© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
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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Ch&'ter 71© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
!#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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Ch&'ter 72© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
!#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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Ch&'ter 7© 2007 – 2010, Cisco Systems, Inc. All rights reserved. Cisco Public
!#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