ip routing iiprbas001
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CETTM MTNL
1IP Routing
IP ROUTING
MODULE ID: IIPRBAS001
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CETTM MTNL
2IP Routing
Topics Covee!
1" B#sic outing concepts
$" Routing #n! Route! Potoco%s
&" St#tic Routing
'" De(#u%t Routing
)" D*n#+ic Routing
," Routing In(o+#tion Potoco%
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CETTM MTNL
3IP Routing
Routing - Route! Potoco%s
✔ IP outing is t.e pocess o( +oving p#c/ets (o+ oneneto/ to #not.e neto/ using outes"
✔ A outing potoco% is use! * outes to
●
!*n#+ic#%%* (in! #%% t.e neto/s in t.e inteneto/● ensue t.#t #%% outes .#ve t.e s#+e outing t#%e"
✔ E2#+p%es o( outing potoco%s #e RIP3 IGRP3 EIGRP3#n! OSP4"
✔ A oute! potoco% c#n e use! to sen! use !#t#
5p#c/ets6 t.oug. t.e est#%is.e! %in/"✔ E2#+p%es o( oute! potoco%s #e IP #n! IP7"
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CETTM MTNL
4IP Routing
Routing B#sics
✔ T.e oute %e#ns #out e+ote neto/s (o+neig.o outes o (o+ #n #!+inist#to"
✔ T.e oute ui%!s # outing t#%e t.#t !escies .oto (in! t.e e+ote neto/s"
✔ Route /nos .o to get to !iect%* connecte!neto/s
✔ I( # neto/ isn8t connecte!3 t.e oute +ust %e#n.o to get to t.e e+ote neto/ in to #*s:● St#tic outing3
● D*n#+ic outing"● De(#u%t outing
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CETTM MTNL
5IP Routing
Routing #coss t.e G%oe
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CETTM MTNL
6IP Routing
T.e IP Routing Pocess
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CETTM MTNL
7IP Routing
A si+p%e outing e2#+p%e
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CETTM MTNL
8IP Routing
IP outing e2#+p%e
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CETTM MTNL
9TCP9IP
IP outing e2#+p%e
1" T.e !estin#tion #!!ess o( # (#+e3 (o+ ostA3 i%% et.e MAC #!!ess o( t.e 40;0 inte(#ce o( t.e RouteAoute"
$" T.e !estin#tion #!!ess o( # p#c/et i%% e t.e IP#!!ess o( t.e neto/ inte(#ce c#! 5NIC6 o( t.eTTP seve"
&" T.e !estin#tion pot nu+e in t.e seg+ent .e#!e i%%
.#ve # v#%ue o( <0"
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CETTM MTNL
10IP Routing
IP outing e2#+p%e $
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CETTM MTNL
11IP Routing
1" T.e !estin#tion #!!ess o( # (#+e3 (o+ ostA3 i%% et.e MAC #!!ess o( t.e 40;0 inte(#ce o( t.e RouteAoute"
$" T.e !estin#tion #!!ess o( # p#c/et i%% e t.e IP
#!!ess o( t.e neto/ inte(#ce c#! 5NIC6 o( t.eTTPS seve"
&" T.e !estin#tion pot nu+e in t.e seg+ent .e#!e i%%.#ve # v#%ue o( ''&"
T.e !estin#tion MAC #!!ess i%% #%#*s e t.e oute8sinte(#ce=i( t.e p#c/ets #e !estine! (o outsi!e t.e LAN
IP outing e2#+p%e $
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CETTM MTNL
12IP Routing
St#tic Routing A!v#nt#ges
St#tic outing occus .en outes #e +#nu#%%* #!!e!in e#c. oute8s outing t#%e"St#tic outing ene(its:✔ T.ee is no ove.e#! on t.e oute CPU3 .ic.
+e#ns possi%* # c.e#pe oute c#n e oug.tt.#n i( !*n#+ic outing is use!"
✔ T.ee is no #n!i!t. us#ge eteen outes3 t.uss#ving +one* on #n %in/s
✔ It #!!s secuit*3 ec#use t.e #!+inist#to c#n
c.oose to #%%o outing #ccess to cet#in neto/son%*"
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CETTM MTNL
13IP Routing
St#tic Routing !is#!v#nt#ges
St#tic outing !is#!v#nt#ges:✔ T.e #!+inist#to +ust e#%%* un!est#n! t.e
inteneto/ #n! .o e#c. oute is connecte!✔ I( # neto/ is #!!e! to t.e inteneto/3 t.e
#!+inist#to .#s to #!! # oute to it on #%% outes=* .#n!"
✔ It8s not (e#si%e in %#ge neto/s
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CETTM MTNL
14IP Routing
St#tic Routing
Co++#n! s*nt#2 use! to #!! # st#tic oute to # outingt#%e:
ip route [destination_network] [mask] [next-hop_address or exitinterface][administrative_distance] [permanent]
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CETTM MTNL
15IP Routing
St#tic Routing E2#+p%e
Router(config)#ip route 17!1"!!$ %%!%%!%%!$1&!1"'!! 1%$
✔ T.e 1)0 #t t.e en! c.#nges t.e !e(#u%t#!+inist#tive !ist#nce 5AD6 o( 1 to 1)0"
✔ T.e AD is t.e tustot.iness o( # oute3 .ee 0 isest #n! $)) is ost"
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CETTM MTNL
16IP Routing
De(#u%t Routing
✔ De(#u%t outing is use! to sen! p#c/ets it. # e+ote!estin#tion neto/ not in t.e outing t#%e to t.ene2t9.op oute"
✔ De(#u%t outing c#n on%* e use! on stu neto/s=t.ose it. on%* one e2it p#t. out o( t.e neto/"
✔ A !e(#u%t oute is # st#tic oute t.#t uses i%!c#!s
inste#! o( neto/ #n! +#s/ in(o+#tion"
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CETTM MTNL
17IP Routing
De(#u%t Routing
T.ee so%utions 5#%% povi!ing t.e s#+e so%ution6 (o#!!ing # g#te#* o( %#st esot on t.e g#te#* oute to
t.e ISP"
atewa*(config)#ip route $!$!$!$ $!$!$!$ 17!1!"!1
atewa*(config)#ip route $!$!$!$ $!$!$!$ s$+$
atewa*(config)#ip defau,t-network 17!1!"!$
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CETTM MTNL
18IP Routing
De(#u%t Routing
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CETTM MTNL
19IP Routing
D*n#+ic Routing
✔ D*n#+ic outing is .en potoco%s #e use! to (in!
neto/s #n! up!#te outing t#%es on outes"
✔ T.is is e#sie t.#n using st#tic o !e(#u%t outing3 utit costs +oe in te+s o( oute CPU pocesses #n!
#n!i!t. on t.e neto/ %in/s"
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CETTM MTNL
20IP Routing
Routing Potoco%s
✔ IP outing is t.e pocess o( +oving p#c/ets (o+
one neto/ to #not.e neto/ using outes"
✔ A outing potoco% is use! * outes to
● !*n#+ic#%%* (in! #%% t.e neto/s in t.e inteneto/
● ensue t.#t #%% outes .#ve t.e s#+e outing t#%e"
✔ E2#+p%es o( outing potoco%s #e RIP3 IGRP3
EIGRP3 IS9IS3OSP43BGP etc"
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CETTM MTNL
21IP Routing
C%#ssi(ic#tion o( Routing Potoco%s
T.ee #e t.ee c%#sses o( outing potoco%s:✔ Dist#nce vecto ● T.e !ist#nce9vecto potoco%s (in! t.e est p#t. to #
e+ote neto/ * >u!ging !ist#nce .ic. is t.e no" o(.ops" Bot. RIP #n! IGRP #e !ist#nce9vecto outingpotoco%s" T.e* sen! t.e entie outing t#%e to !iect%*connecte! neig.os"
✔ Lin/ st#te● A%so c#%%e! #s s.otest9p#t.9(ist potoco%s3 t.e outes
e#c. ce#te t.ee sep##te t#%es" OSP4 is #n IP outingpotoco% t.#t is co+p%ete%* %in/ st#te"
✔ *i!● *i! potoco%s use #spects o( ot. !ist#nce vecto #n!
%in/ st#te=(o e2#+p%e3 EIGRP"
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CETTM MTNL
22IP Routing
Routing Potoco% T*pes
✔ T.ee #e to t*pes o( outing potoco%s use! ininteneto/s:● Inteio G#te#* Potoco%s 5IGPs6 Eg"
RIP3EIGRP3OSP4
● E2teio G#te#* Potoco%s 5EGPs6Eg" BGP
✔ IGPs #e use! to e2c.#nge outing in(o+#tion it.outes in t.e s#+e #utono+ous s*ste+ 5AS6"
✔ An AS is # co%%ection o( neto/s un!e # co++on#!+inist#tive !o+#in3 .ic. +e#ns t.#t #%% outes
s.#ing t.e s#+e outing t#%e in(o+#tion #e in t.es#+e AS"✔ EGPs #e use! to co++unic#te eteen ASes"
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CETTM MTNL
23LAN
A!+inist#tive Dist#nces
✔ T.e administrative distance 5AD6 is use! to #te t.etustot.iness o( outing in(o+#tion eceive! on #oute (o+ # neig.o oute"
✔ An #!+inist#tive !ist#nce is #n intege (o+ 0 to $))3
.ee 0 is t.e +ost tuste! #n! $)) +e#ns no t#((ic i%%e p#sse! vi# t.is oute"
✔ I( # oute eceives to up!#tes %isting t.e s#+e e+oteneto/3 t.e (ist t.ing t.e oute c.ec/s is t.e AD"
✔ I( one o( t.e #!vetise! outes .#s # %oe AD t.#n t.e
ot.e3 t.en t.e oute it. t.e %oest AD i%% e p%#ce! int.e outing t#%e"
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CETTM MTNL
24IP Routing
A!+inist#tive Dist#nces9 Cont!
✔ I( ot. #!vetise! outes to t.e s#+e neto/ .#ve t.es#+e AD3 t.en outing potoco% +etics i%% e use! to(in! t.e est p#t. to t.e e+ote neto/"
✔ T.e #!vetise! oute it. t.e %oest +etic i%% ep%#ce! in t.e outing t#%e"
✔ But i( ot. #!vetise! outes .#ve t.e s#+e AD #s e%%#s t.e s#+e +etics3 t.en t.e outing potoco% i%%
%o#!9#%#nce to t.e e+ote neto/
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CETTM MTNL
25IP Routing
De(#u%t A!+inist#tive Dist#nces
Connecte! Inte(#ce 0
St#tic Route 1
EIGRP ?0
IGRP 100OSP4 110
RIP 1$0
E2ten#% EIGRP 1@0
Un/non $))
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CETTM MTNL
26IP Routing
Routing In(o+#tion Potoco% 5RIP6
✔ A tue !ist#nce9vecto outing potoco%✔ Sen!s t.e co+p%ete outing t#%e out to #%% #ctive
inte(#ces eve* &0 secon!s 5Peio!ic o#!c#st6✔ On%* uses .op count to !ete+ine t.e est #* to
# e+ote neto/✔ #s # +#2i+u+ #%%o#%e .op count o( 1) *
!e(#u%t3 +e#ning t.#t 1, is !ee+e! une#c.#%e✔ o/s e%% in s+#%% neto/s3 ut it8s ine((icient on
%#ge neto/s it. s%o AN %in/s o onneto/s it. # %#ge nu+e o( outes inst#%%e!
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CETTM MTNL
27IP Routing
✔ RIP vesion 1 uses on%* c%#ss(u% outing3 .ic.+e#ns t.#t #%% !evices in t.e neto/ +ust use t.es#+e sunet +#s/"
✔ RIP vesion 1 !oesn8t sen! up!#tes it. sunet+#s/ in(o+#tion in to"
✔ RIP vesion $ povi!es pe(i2 outing3 #n! !oessen! sunet +#s/ in(o+#tion it. t.e outeup!#tes" T.is is c#%%e! c%#ss%ess outing"
Routing In(o+#tion Potoco% 5RIP6
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CETTM MTNL
28IP Routing
RIP Ti+es
RIP uses (ou !i((eent /in!s o( ti+es to egu%#te its
pe(o+#nce:● Route up!#te ti+e
● Route inv#%i! ti+e
● o%!!on ti+e
● Route (%us. ti+e
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CETTM MTNL
29IP Routing
o%!ing Don RIP Pop#g#tions
✔ T.ee #e # (e !i((eent #*s to stop un#nte! RIP
up!#tes (o+ pop#g#ting #coss LANs #n! ANs"
✔ T.e e#siest one is t.oug. t.e p#ssive9inte(#ce
co++#n!"
✔ T.is co++#n! pevents RIP up!#te o#!c#sts (o+
eing sent out # !e(ine! inte(#ce3 ut t.#t s#+e
inte(#ce c#n sti%% eceive RIP up!#tes"
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CETTM MTNL
30IP Routing
Sp%it oion
T.is +et.o! pevents #ccept#nce o( #n* oute
#!vetise+ents on t.e inte(#ce (o+ .ee t.e
s#+e oute is #!vetise! initi#%%*
Route Poisoning
An* une#c.#%e oute is #!vetise! it. # .op
count o( 1, 5 T.e +#2i+u+ .op count (o RIPeing1)6
T.is #!vetise+ent is #c/no%e!ge! * t.e
ecipient * Poison Revese
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CETTM MTNL
31LAN
Loop Avoi!#nce Met.o!s
✔ Sp%it oion● T.is +et.o! pevents #ccept#nce o( #n* oute
#!vetise+ents on t.e inte(#ce (o+ .ee t.e s#+e
oute is #!vetise! initi#%%*✔ Route Poisoning
● An* une#c.#%e oute is #!vetise! it. # .op count o(1, 5 T.e +#2i+u+ .op count (o RIP eing1)6
● T.is #!vetise+ent is #c/no%e!ge! * t.e ecipient *
Poison Revese
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CETTM MTNL
32IP Routing
RIP esion $ 5RIPv$6
✔ Bot. RIPv1 #n! RIPv$ #e !ist#nce9vecto potoco%s3 9
oute unning RIP sen!s its co+p%ete outing t#%esout #%% #ctive inte(#ces #t peio!ic ti+e intev#%s
✔ A%so3 t.e ti+es #n! %oop9#voi!#nce sc.e+es #e t.es#+e in ot. RIP vesions=i"e"3 .o%!!on ti+es #n!sp%it .oion u%e
✔ RIPv$ is consi!ee! c%#ss%ess ec#use sunetin(o+#tion is sent it. e#c. oute up!#te63 #n! ot.RIPv1 - v$ .#ve t.e s#+e #!+inist#tive !ist#nce51$06
✔
RIPv$ +oe sc#%#%e t.#n RIPv1✔ RIP is #n open st#n!#!3 #n! c#n e use! it. #n*#n! o( oute
✔ RIP euies too +uc. #n!i!t.
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CETTM MTNL
33IP Routing
RIPv1 vs" RIPv$
RIP v1 RIP v2
Dist#nce ecto Dist#nce ecto
M#2i+u+ .op count 1) M#2i+u+ .op count 1)
C%#ss(u% C%#ss%ess
No suppot (o LSM Suppots LSM
No suppot (o !iscontiguousneto/s
Suppots !iscontiguousneto/s
Routing up!#tes * peio!ic
o#!c#sts 5&0 sec6
Routing up!#tes * peio!ic
+u%tic#st $$'"0"0"?
No #ut.entic#tion Suppots #ut.entic#tion
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CETTM MTNL
34IP Routing
Su++#*
1" B#sic outing concepts$" Routing #n! Route! Potoco%s&" St#tic Routing A!v#nt#ges #n! !is#!v#nt#ges
'" De(#u%t Routing)" D*n#+ic Routing," Routing potoco%s t*pes - C%#ssi(ic#tion@" A!+inist#tive Dist#nce
<" RIP vesion 1 - $
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CETTM MTNL
35LAN
Re(eences
URLs:● .ttp:;;cisco"co+
●
.ttp:;;en"i/ipe!i#"og
Boo/s:● Inteneto/ing Tec.no%og* #n!oo/F * Cisco Pess
● CCNA Stu!* Gui!eF * To!! L#++%e
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