5.2.1.8 laboratorio: observación de arp con la cli de windows, la cli de ios y wireshark

7/17/2019 5.2.1.8 Laboratorio: observación de ARP con la CLI de Windows, la CLI de IOS y Wireshark

http://slidepdf.com/reader/full/5218-laboratorio-observacion-de-arp-con-la-cli-de-windows-la-cli-de-ios 1/17

Práctica de laboratorio: Observación del protocolo ARP mediante

la CLI de Windows, la CLI del IOS y Wiresar!

"opolo#$a

"abla de direccionamiento

%ispositivo Inter&a' %irección IP

(áscara de

s)bred

*ateway

predeterminado

R1 G0/1 192.168.1.1 255.255.255.0 No aplicable

S1 VLAN 1 192.168.1.11 255.255.255.0 192.168.1.1

S2 VLAN 1 192.168.1.12 255.255.255.0 192.168.1.1

PC-A NIC 192.168.1.3 255.255.255.0 192.168.1.1

PC-B NIC 192.168.1.2 255.255.255.0 192.168.1.1

Ob+etivos

Parte : Armar y con&i#)rar la red

Parte -: .tili'ar el comando ARP de Windows

Parte /: .tili'ar el comando sow ARP del IOS

Parte 0: .tili'ar Wiresar! para e1aminar los intercambios ARP

In&ormación básica2Sit)ación

CP/IP !"ili#a el p$o"ocolo %e $e&ol!ci'( %e %i$eccio(e& )ARP* pa$a a&i+(a$ !(a %i$ecci'( IP %e capa 3 a !(a%i$ecci'( ,AC %e capa 2. C!a(%o &e coloca !(a "$aa e( la $e% %ebe "e(e$ !(a %i$ecci'( ,AC %e %e&"i(o.Pa$a %e&c!b$i$ %i(icae("e la %i$ecci'( ,AC %el %i&po&i"io %e %e&"i(o &e "$a(&i"e !(a &olici"!% %e ARPe( la LAN. l %i&po&i"io !e co("ie(e la %i$ecci'( IP %e %e&"i(o $e&po(%e la %i$ecci'( ,AC &e $e+i&"$a e(la cac4 ARP. Ca%a %i&po&i"io e( la LAN a("ie(e &! p$opio cac4 ARP o !( $ea pe!ea e( RA, !e

7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a %e 3



Práctica de laboratorio: Observación del protocolo ARP mediante la CLI de Windows, la CLI del IOS y

Wiresar!

co("ie(e lo& $e&!l"a%o& ARP. ;( c$o('e"$o %e cac4 %e ARP elii(a la& e("$a%a& ARP !e (o &e 4a(!&a%o po$ !( %e"e$i(a%o pe$<o%o %e "iepo.

ARP e& !( e=cele("e e>eplo %el e!ilib$io %el $e(%iie("o. Si( cac4 ARP %ebe co("i(!ae("e &olici"a$"$a%!ccio(e& %e %i$eccio(e& ca%a e# !e &e coloca !(a "$aa e( la $e%. &"o a+$e+a la"e(cia a laco!(icaci'( p!e%e co(+e&"io(a$ la LAN. Po$ el co("$a$io lo& "iepo& %e e&pe$a ilii"a%o& po%$<a(p$ooca$ e$$o$e& co( %i&po&i"io& !e %e>a( la $e% o cabia$ la %i$ecci'( %e la Capa 3.

;( a%i(i&"$a%o$ %e $e% %ebe e&"a$ al "a("o %el ARP pe$o e& po&ible !e (o i("e$ac":e co( el p$o"ocolo$e+!la$e("e. ARP e& !( p$o"ocolo !e pe$i"e !e lo& %i&po&i"io& %e $e% &e co!(i!e( co( el p$o"ocoloCP/IP. Si( ARP (o 4a !( "o%o eicie("e pa$a co(&"$!i$ el %a"a+$aa %e la %i$ecci'( %e %e&"i(o %e laCapa 2. abi( ARP e& !( $ie&+o %e &e+!$i%a% po"e(cial. La &!pla("aci'( %e i%e("i%a% %e ARP oe(e(e(aie("o %e ARP e& !(a "c(ica !&a%a po$ !( a"aca("e pa$a i(ec"a$ !(a %i$ecci'( ,AC i(co$$ec"aa&ocia%a a !(a $e%. ;( a"aca("e al&iica la %i$ecci'( ,AC %e !( %i&po&i"io la& "$aa& &o( e(ia%a& a!( %e&"i(o e!ioca%o. Co(i+!$a$ a(!ale("e a&ociacio(e& ARP e&""ica& e& !(a a(e$a %e ipe%i$ la&!pla("aci'( %e i%e("i%a% %e ARP. Po$ :l"io &e p!e%e co(i+!$a$ !(a li&"a %e %i$eccio(e& ,ACa!"o$i#a%a& e( lo& %i&po&i"io& Ci&co pa$a $e&"$i(+i$ el acce&o a la $e% &olo a lo& %i&po&i"io& ap$oba%o&.

( e&"a p$c"ica %e labo$a"o$io !"ili#a$ lo& coa(%o& ARP "a("o e( lo& $o!"e$& ?i(%o@& coo Ci&co pa$ai&!ali#a$ la "abla ARP. abi( bo$$a$ la cac4 ARP a+$e+a$ e("$a%a& ARP e&""ica&.

4ota lo& $o!"e$& !e &e !"ili#a( e( la& p$c"ica& %e labo$a"o$io %e CCNA &o( $o!"e$& %e &e$icio& i("e+$a%o&)ISR I("e+$a"e% Se$ice& Ro!"e$&* Ci&co 191 co( Ci&co IS e$&i'( 15.2)*,3 )ia+e( !(ie$&al9*. Lo&&@i"c4e& !e &e !"ili#a( &o( Ci&co Ca"al&" 2960& co( Ci&co IS e$&i'( 15.0)2* )ia+e( %e la(ba&e9*.P!e%e( !"ili#a$&e o"$o& $o!"e$& &@i"c4e& e$&io(e& %e Ci&co IS. Se+:( el o%elo la e$&i'( %e Ci&coIS lo& coa(%o& %i&po(ible& lo& $e&!l"a%o& ob"e(i%o& p!e%e( %ie$i$ %e lo& !e &e !e&"$a( e( la&p$c"ica& %e labo$a"o$io. Co(&!l"e la "abla Re&!e( %e i("e$ace& %el $o!"e$ !e &e e(c!e("$a al i(al %e e&"ap$c"ica %e labo$a"o$io pa$a ob"e(e$ lo& i%e("iica%o$e& %e i("e$a# co$$ec"o&.

4ota a&e+:$e&e %e !e lo& $o!"e$& lo& &@i"c4e& &e 4aa( bo$$a%o (o "e(+a( co(i+!$acio(e& %e i(icio. Si(o e&" &e+!$o co(&!l"e co( el i(&"$!c"o$.

Rec)rsos necesarios

D 1 $o!"e$ )Ci&co 191 co( Ci&co IS e$&i'( 15.2)*,3 ia+e( !(ie$&al o &iila$*

D 2 &@i"c4e& )Ci&co 2960 co( Ci&co IS e$&i'( 15.0)2* Eia+e( la(ba&e9 o copa$ableF*D 2 PC )?i(%o@& Vi&"a o HP co( !( p$o+$aa %e e!laci'( %e "e$i(al i(&"ala%o po$ e>eplo e$a

e$ ?i$e&4a$*

D Cable& %e co(&ola pa$a co(i+!$a$ lo& %i&po&i"io& Ci&co IS e%ia("e lo& p!e$"o& %e co(&ola

D Cable& "4e$(e" coo &e !e&"$a e( la "opolo+<a.

4ota: la& i("e$ace& a&" "4e$(e" e( lo& &@i"c4e& Ci&co 2960 c!e("a( co( %e"ecci'( a!"o"ica &e p!e%e!"ili#a$ !( cable %i$ec"o %e "4e$(e" e("$e lo& &@i"c4e& S1 S2. Si !"ili#a o"$o o%elo %e &@i"c4 Ci&co p!e%e&e$ (ece&a$io !&a$ !( cable c$!#a%o "4e$(e".

Parte : Armar y con&i#)rar la red

Paso : "ender el cableado de red de ac)erdo con la topolo#$a

Paso -: Con&i#)rar las direcciones IP de los dispositivos de ac)erdo con la tabla de

direccionamiento

Paso /: 5eri&icar la conectividad de red aciendo pin# a todos los dispositivos de la PC67

Parte -: .sar el comando ARP de Windows

7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a - %e 3




Wiresar!

l coa(%o arp pe$i"e al !&!a$io e$ o%iica$ la cac4 ARP e( ?i(%o@&. A e&"e coa(%o &e acce%e%e&%e el &<bolo %el &i&"ea %e ?i(%o@&.

Paso : 5is)ali'ar la cac8 ARP

a. Ab$a !(a e("a(a %e coa(%o& e( la PC-A e&c$iba arp.

C:\Users\User1> arp

Displays and modifies the IP-to-Physical address translation tables used by

address resolution protocol (AP!"

AP -s inet#addr eth#addr $if#addr%

AP -d inet#addr $if#addr%

AP -a $inet#addr% $-& if#addr% $-'%

-a Displays current AP entries by interroatin the current

protocol data" If inet#addr is specified) the IP and Physical

addresses for only the specified computer are displayed" If

more than one net*or+ interface uses AP) entries for each AP

table are displayed" - ,ame as -a" -' Displays

current AP entries in 'erbose mode" All in'alid entries and

entries on the loop-bac+ interface *ill be sho*n" inet#addr ,pecifies an

internet address" -& if#addr Displays the AP entries for the net*or+

interface specified by if#addr" -d Deletes the

host specified by inet#addr" inet#addr may be *ildcarded *ith

to delete all hosts" -s Adds the host and associates the

Internet address inet#addr *ith the Physical address eth#addr"

.he Physical address is i'en as / he0adecimal bytes separated

by hyphens" .he entry is permanent" eth#addr ,pecifies

a physical address"

if#addr If present) this specifies the Internet address of the

interface *hose address translation table should be modified" Ifnot present) the first applicable interface *ill be used" 0ample:

> arp -s 123"22"42"515 66-aa-66-/5-c/-67 """" Adds a static entry"

> arp -a """" Displays the arp table"

b. b&e$e el $e&!l"a%o.

JK! coa(%o &e !&a$<a pa$a o&"$a$ "o%a& la& e("$a%a& e( la cac4 ARP

a$p Ma

JK! coa(%o &e !&a$<a pa$a elii(a$ "o%a& la& e("$a%a& %e la cac4 ARP )p!$+a$ la cac4 ARP*

a$p M%

JK! coa(%o &e !&a$<a pa$a elii(a$ la e("$a%a %e la cac4 ARP pa$a 192.168.1.11

a$p M% 192.168.1.11

c. &c$iba arp 9a pa$a i&!ali#a$ la "abla ARP.

C:\Users\User1> arp –a

Interface: 175"1/4"1"8 --- 60b

Internet Address Physical Address .ype

175"1/4"1"1 d9-4c-b2-ce-a6-c1 dynamic

175"1/4"1"522 ff-ff-ff-ff-ff-ff static

7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a / %e 3




Wiresar!

559"6"6"55 61-66-2e-66-66-1/ static

559"6"6"525 61-66-2e-66-66-fc static

587"522"522"526 61-66-2e-3f-ff-fa static

4ota: la "abla ARP e&" ac<a &i !"ili#a ?i(%o@& HP )coo &e !e&"$a a co("i(!aci'(*.

C:\Documents and ,ettins\User1> arp -a &o

AP ntries ound"

%. Oa+a pi(+ %e la PC-A a la PC-B pa$a a+$e+a$ %i(icae("e e("$a%a& %e la cac4 ARP.

C:\Documents and ,ettins\User1> ping 192.168.1.2

Interface: 175"1/4"1"8 --- 60b


175"1/4"1"5 66-26-2/-be-f/-db dynamic

JC!l e& la %i$ecci'( <&ica pa$a el 4o&" co( %i$ecci'( IP 192.168.1.2

00-50-56-be-6-%b

Paso -: A+)star las entradas en la cac8 ARP man)almente

Pa$a elii(a$ la& e("$a%a& e( la cac4 ARP ei"a el coa(%o arp 9d inet6addr ; <=. La& %i$eccio(e& &ep!e%e( elii(a$ %e a(e$a i(%ii%!al al e&peciica$ la %i$ecci'( IP o bie( "o%a& >!("a& co( el @il%ca$% *.

Ve$ii!e !e la cac4 ARP co("e(+a la& e("$a%a& &i+!ie("e& el +a"e@a p$e%e"e$i(a%o R1 G0/1)192.168.1.1* la PC-B )192.168.1.2* lo& %o& &@i"c4e& )192.168.1.11 192.168.1.12*.

a. ( la PC-A 4a+a pi(+ a "o%a& la& %i$eccio(e& %e la "abla %e %i$eccio(e&.

b. Ve$ii!e !e "o%a& la& %i$eccio(e& &e 4aa( a+$e+a%o a la cac4 ARP. Si la %i$ecci'( (o e&" e( lacac4 ARP 4a+a pi(+ a la %i$ecci'( %e %e&"i(o e$ii!e !e &e 4aa a+$e+a%o a la cac4 ARP.


Interface: 175"1/4"1"8 --- 60b


175"1/4"1"1 d9-4c-b2-ce-a6-c1 dynamic

175"1/4"1"5 66-26-2/-be-f/-db dynamic

175"1/4"1"11 6c-d7-7/-e4-4a-96 dynamic

175"1/4"1"15 6c-d7-7/-d5-96-96 dynamic


559"6"6"55 61-66-2e-66-66-1/ static

559"6"6"525 61-66-2e-66-66-fc static

587"522"522"526 61-66-2e-3f-ff-fa static

c. Coo a%i(i&"$a%o$ acce%a al &<bolo %el &i&"ea. Oa+a clic e( el <co(o Inicio e( el c!a%$o Buscar programas y archivo e&c$iba cmd. C!a(%o apa$e#ca el <co(o cmd 4a+a clic co( el bo"'( &ec!(%a$io e(l &eleccio(e >+ec)tar como administrador . Oa+a clic e( S$ pa$a pe$i"i$ !e e&"e p$o+$aa $ealicelo& cabio&.

4ota: pa$a lo& !&!a$io& %e ?i(%o@& HP (o e& (ece&a$io "e(e$ p$iile+io& %e a%i(i&"$a%o$ pa$ao%iica$ la& e("$a%a& %e la cac4 ARP.

7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a 0 %e 3




Wiresar!

%. ( la e("a(a %el &<bolo %el &i&"ea A%i(i&"$a%o$ e&c$iba arp 9d <. &"e coa(%o elii(a "o%a& la&e("$a%a& %e la cac4 ARP. Ve$ii!e !e "o%a& la& e("$a%a& %e la cac4 ARP &e 4aa( elii(a%oQ pa$ae&o e&c$iba arp6a e( el &<bolo %el &i&"ea.

C:\*indo*s\system85> arp –d *

C:\*indo*s\system85> arp –a &o

AP ntries ound"

e. &pe$e !(o& i(!"o&. l p$o"ocolo %e %e&c!b$iie("o %e eci(o& coie(#a a lle(a$ la cac4 ARP(!eae("e.


Interface: 175"1/4"1"8 --- 60b



4ota: el p$o"ocolo %e %e&c!b$iie("o %e eci(o& (o e&" iplee("a%o e( ?i(%o@& HP.

. ( la PC-A 4a+a pi(+ a la PC-B )192.168.1.2* a lo& &@i"c4e& )192.168.1.11 192.168.1.12* pa$aa+$e+a$ la& e("$a%a& ARP. Ve$ii!e !e la& e("$a%a& ARP &e 4aa( a+$e+a%o a la cac4.


Interface: 175"1/4"1"8 --- 60b


7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a ? %e 3




Wiresar!

175"1/4"1"5 66-26-2/-be-f/-db dynamic

175"1/4"1"11 6c-d7-7/-e4-4a-96 dynamic

175"1/4"1"15 6c-d7-7/-d5-96-96 dynamic


+. Re+i&"$e la %i$ecci'( <&ica %el &@i"c4 S2.

La& $e&p!e&"a& a$<a(. 0c-%9-96-%2-0-0 e( e&"e ca&o.

4. lii(e !(a e("$a%a %e cac4 ARP e&pec<ica e&c$ibie(%o arp 9d inet-addr . ( el &<bolo %el &i&"eae&c$iba arp 9d @-B3- pa$a elii(a$ la e("$a%a ARP pa$a el S2.

C:\*indo*s\system85> arp –d 192.168.1.12

i. &c$iba arp 9a pa$a e$iica$ !e la e("$a%a ARP pa$a el S2 &e elii(' %e la cac4 ARP.


Interface: 175"1/4"1"8 --- 60b


175"1/4"1"5 66-26-2/-be-f/-db dynamic

175"1/4"1"11 6c-d7-7/-e4-4a-96 dynamic175"1/4"1"522 ff-ff-ff-ff-ff-ff static

>. P!e%e a+$e+a$ !(a e("$a%a %e cac4 ARP e&pec<ica e&c$ibie(%o arp 9s inet_addr_mac_addr . ( e&"ee>eplo &e !"ili#a$ la %i$ecci'( IP la %i$ecci'( ,AC pa$a el S2. ;&e la %i$ecci'( ,AC $e+i&"$a%a e( elpa&o +.

C:\*indo*s\system85> arp –s 192.168.1.12 0c-d9-96-d2-40-40

. Ve$ii!e !e la e("$a%a ARP pa$a el S2 &e 4aa a+$e+a%o a la cac4.

Parte /: .tili'ar el comando sow arp del IOS

Ci&co IS "abi( p!e%e o&"$a$ la cac4 ARP e( lo& $o!"e$& &@i"c4e& e%ia("e el coa(%o sow arp o

sow ip arp.Paso : (ostrar las entradas ARP del ro)ter R

1; show arp

Protocol Address Ae (min! <ard*are Addr .ype Interface

Internet 175"1/4"1"1 - d94c"b2ce"a6c1 APA =iabitthernet61

Internet 175"1/4"1"5 6 6626"2/be"f/db APA =iabitthernet61

Internet 175"1/4"1"8 6 6626"2/be"3/4c APA =iabitthernet61 1;

b&e$e !e (o 4a (i(+:( alo$ %e A+e )-* pa$a la p$ie$a e("$a%a la i("e$a# %el $o!"e$ G0/1 )el+a"e@a p$e%e"e$i(a%o %e LAN*. A+e e& la ca("i%a% %e i(!"o& )i(* !e la e("$a%a e&"!o e( lacac4 ARP &e i(c$ee("a pa$a la& o"$a& e("$a%a&. l p$o"ocolo %e %e&c!b$iie("o %e eci(o& lle(a la&e("$a%a& ARP %e la& %i$eccio(e& IP ,AC %e la PC-A la PC-B.

Paso -: A#re#ar entradas ARP del ro)ter R

P!e%e a+$e+a$ e("$a%a& ARP a la "abla ARP %el $o!"e$ 4acie(%o pi(+ a o"$o& %i&po&i"io&. a.

Oa+a pi(+ al &@i"c4 S1.

1; ping 192.168.1.11

.ype escape se?uence to abort" ,endin 2) 166-byte IC@P chos to

175"1/4"1"11) timeout is 5 seconds: "

,uccess rate is 46 percent (92!) round-trip mina'ma0 B 159 ms

7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a B %e 3




Wiresar!

b. Ve$ii!e !e !(a e("$a%a ARP pa$a el &@i"c4 S1 &e 4aa a+$e+a%o a la "abla ARP %el R1.

1; show ip arp


Internet 175"1/4"1"1 - d94c"b2ce"a6c1 APA =iabitthernet61

Internet 175"1/4"1"5 / 6626"2/be"f/db APA =iabitthernet61

Internet 175"1/4"1"8 / 6626"2/be"3/4c APA =iabitthernet61 Internet

175"1/4"1"11 6 6cd7"7/e4"4a96 APA =iabitthernet61

1;

Paso /: (ostrar las entradas ARP del switc S

,1; show ip arp


Internet 175"1/4"1"1 9/ d94c"b2ce"a6c1 APA lan1

Internet 175"1/4"1"5 4 6626"2/be"f/db APA lan1

Internet 175"1/4"1"8 4 6626"2/be"3/4c APA lan1 Internet

175"1/4"1"11 - 6cd7"7/e4"4a96 APA lan1

,1;

Paso 0: A#re#ar entradas ARP en el switc S

Al 4ace$ pi(+ a o"$o& %i&po&i"io& "abi( &e p!e%e a+$e+a$ e("$a%a& ARP a la "abla ARP %el &@i"c4. a.

( el &@i"c4 S1 4a+a pi(+ al &@i"c4 S2.

,1; ping 192.168.1.12

.ype escape se?uence to abort" ,endin 2) 166-byte IC@P chos to

175"1/4"1"15) timeout is 5 seconds: "

,uccess rate is 46 percent (92!) round-trip mina'ma0 B 154 ms

b. Ve$ii!e !e la e("$a%a ARP pa$a el &@i"c4 S2 &e 4aa a+$e+a%o a la "abla ARP %el S1.

,1; show ip arp

Protocol Address Ae (min! <ard*are Addr .ype InterfaceInternet 175"1/4"1"1 2 d94c"b2ce"a6c1 APA lan1

Internet 175"1/4"1"5 11 6626"2/be"f/db APA lan1

Internet 175"1/4"1"8 11 6626"2/be"3/4c APA lan1

Internet 175"1/4"1"11 - 6cd7"7/e4"4a96 APA lan1 Internet175"1/4"1"15 5 6cd7"7/d5"9696 APA lan1

,1;

Parte 0: .tili'ar Wiresar! para e1aminar los intercambios ARP

( la pa$"e e=ai(a$ lo& i("e$cabio& ARP e%ia("e ?i$e&4a$ pa$a cap"!$a$ eal!a$ el i("e$cabio ARP. abi( e=ai(a$ la la"e(cia %e $e% !e ca!&a( lo& i("e$cabio& ARP e("$e lo& %i&po&i"io&.

Paso : Con&i#)rar Wiresar! para las capt)ras de pa)etes

a. I(icie ?i$e&4a$.

b. li>a la i("e$a# %e $e% !e %e&ea !&a$ pa$a cap"!$a$ lo& i("e$cabio& ARP.

Paso -: Capt)rar y eval)ar las com)nicaciones del ARP

a. I(icie la cap"!$a %e pa!e"e& e( ?i$e&4a$. ;"ilice el il"$o pa$a o&"$a$ &olae("e lo& pa!e"e& ARP.

b. P!$+!e la cac4 ARPQ pa$a e&o e&c$iba el coa(%o arp 9d < e( el &<bolo %el &i&"ea.

7 201 Ci&co /o &!& iliale&. o%o& lo& %e$ec4o& $e&e$a%o&. &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co. P+i(a D %e 3




Wiresar!

c. Ve$ii!e !e la cac4 ARP &e 4aa bo$$a%o.

%. (<e !( pi(+ al +a"e@a p$e%e"e$i(a%o e%ia("e el coa(%o pin# @-B3.

e. e&p!& %e 4ace$ pi(+ al +a"e@a p$e%e"e$i(a%o %e"e(+a la cap"!$a %e ?i$e&4a$.

. =ai(e la& cap"!$a& %e ?i$e&4a$ pa$a lo& i("e$cabio& ARP e( el pa(el %e %e"alle& %el pa!e"e.

JC!l !e el p$ie$ pa!e"e %e ARP Solici"!% %e ARP

Cople"e la &i+!ie("e "abla co( i(o$aci'( &ob$e el p$ie$ pa!e"e %e ARP !e &e cap"!$'.

Campo 5alor

%irección (AC del emisor 5C260A195592 - La& $e&p!e&"a& a$<a(.

%irección IP del emisor 192.168.1.3

%irección (AC de destino 000000000000

%irección IP de destino 192.168.1.1

JC!l !e el &e+!(%o pa!e"e %e ARP Re&p!e&"a %e ARP





Wiresar!

Cople"e la &i+!ie("e "abla co( i(o$aci'( &ob$e el &e+!(%o pa!e"e %e ARP !e &e cap"!$'.

Campo 5alor

%irección (AC del emisor C153A1. La& $e&p!e&"a& a$<a(.

%irección IP del emisor 192.168.1.1

%irección (AC de destino 5C260A195592 - La& $e&p!e&"a& a$<a(.

%irección IP de destino 192.168.1.3

Paso /: >1aminar la latencia de red )e ca)sa el ARP

a. Bo$$e la& e("$a%a& ARP %e la PC-A.

b. I(icie !(a cap"!$a %e ?i$e&4a$.

c. Oa+a pi(+ al &@i"c4 S2 )192.168.1.12*. l pi(+ %ebe &e$ co$$ec"o %e&p!& %e la p$ie$a &olici"!% %e eco.

4ota: &i "o%o& lo& pi(+& &o( co$$ec"o& el S1 %ebe ole$ a ca$+a$&e pa$a ob&e$a$ la la"e(cia %e $e% co(el ARP.

C:\Users\User1> ping 192.168.1.12

e?uest timed out"

eply from 175"1/4"1"15: bytesB85 timeB5ms ..B522



Pin statistics for

175"1/4"1"15:

Pac+ets: ,ent B 9) ecei'ed B 8) ost B 1 (52E loss!) Appro0imate

round trip times in milli-seconds:

@inimum B 1ms) @a0imum B 8ms) A'erae B 5ms

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Wiresar!

%. ;(a e# i(ali#a%o el pi(+ %e"e(+a la cap"!$a %e ?i$e&4a$. ;"ilice el il"$o %e ?i$e&4a$ pa$a o&"$a$&olae("e lo& $e&!l"a%o& %e ARP e IC,P. ( ?i$e&4a$ e&c$iba arp o icmp e( el $ea %e e("$a%aEilter: )il"$o*.

e. =ai(e la cap"!$a %e ?i$e&4a$. ( e&"e e>eplo la "$aa 10 e& la p$ie$a &olici"!% %e IC,P !e &ee(<a %e la PC-A al S1. a%o !e (o 4a !(a e("$a%a ARP pa$a el S1 &e e(i' !(a &olici"!% %e ARP a la%i$ecci'( IP %e a%i(i&"$aci'( %el S1 e( la !e &e &olici"a la %i$ecci'( ,AC. !$a("e lo& i("e$cabio&

ARP la &olici"!% %e eco (o $ecibi' !(a $e&p!e&"a a("e& %e a+o"a$&e el "iepo %e e&pe$a %e la &olici"!%.)$aa& 8 a 12*

e&p!& %e !e la e("$a%a ARP pa$a el S1 &e a+$e+' a la cac4 ARP lo& :l"io& "$e& i("e$cabio&IC,P !e$o( co$$ec"o& coo &e !e&"$a e( la& "$aa& 26 2 30-33.

Coo &e !e&"$a e( la cap"!$a %e ?i$e&4a$ ARP e& !( e=cele("e e>eplo %el e!ilib$io %el$e(%iie("o. Si( cac4 ARP %ebe co("i(!ae("e &olici"a$ "$a%!ccio(e& %e %i$eccio(e& ca%a e# !e &ecoloca !(a "$aa e( la $e%. &"o a+$e+a la"e(cia a la co!(icaci'( p!e%e co(+e&"io(a$ la LAN.

Re&le1ión

1. JC'o c!(%o &e !i"a( la& e("$a%a& ARP e&""ica&

Se elii(a( a(!ale("e.

2. JPo$ ! %e&ea a+$e+a$ e("$a%a& ARP e&""ica& e( la cac4

;(a e("$a%a ARP e&""ica p!e%e i"i+a$ el e(e(e(aie("o o la &!pla("aci'( ARP e( la $e%.

3. Si la& &olici"!%e& ARP p!e%e( ca!&a$ la"e(cia %e $e% Jpo$ ! (o e& co(e(ie("e "e(e$ "iepo& %e e&pe$ailii"a%o& pa$a la& e("$a%a& ARP

Lo& "iepo& %e e&pe$a ilii"a%o& po%$<a( p$ooca$ e$$o$e& co( %i&po&i"io& !e %e>a( la $e% o cabia$ la

%i$ecci'( %e capa 3.

"abla de res)men de inter&aces del ro)ter

Res)men de inter&aces del ro)ter

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Wiresar!

(odelo de

ro)ter

Inter&a' >ternet G Inter&a' >ternet G- Inter&a' serial G Inter&a' serial G-

1800 a&" "4e$(e" 0/0

)0/0*

a&" "4e$(e" 0/1

)0/1*

Se$ial 0/0/0 )S0/0/0* Se$ial 0/0/1 )S0/0/1*

1900 Gi+abi" "4e$(e" 0/0

)G0/0*

Gi+abi" "4e$(e" 0/1

)G0/1*

Se$ial 0/0/0 )S0/0/0* Se$ial 0/0/1 )S0/0/1*

2801 a&" "4e$(e" 0/0

)0/0*

a&" "4e$(e" 0/1

)0/1*

Se$ial 0/1/0 )S0/1/0* Se$ial 0/1/1 )S0/1/1*

2811 a&" "4e$(e" 0/0

)0/0*

a&" "4e$(e" 0/1

)0/1*

Se$ial 0/0/0 )S0/0/0* Se$ial 0/0/1 )S0/0/1*

2900 Gi+abi" "4e$(e" 0/0

)G0/0*

Gi+abi" "4e$(e" 0/1

)G0/1*

Se$ial 0/0/0 )S0/0/0* Se$ial 0/0/1 )S0/0/1*

4ota pa$a co(oce$ la co(i+!$aci'( %el $o!"e$ ob&e$e la& i("e$ace& a i( %e i%e("iica$ el "ipo %e $o!"e$

c!("a& i("e$ace& "ie(e. No e=i&"e !(a o$a eica# %e co(eccio(a$ !(a li&"a %e "o%a& la& cobi(acio(e& %e

co(i+!$acio(e& pa$a ca%a cla&e %e $o!"e$. ( e&"a "abla &e i(cl!e( lo& i%e("iica%o$e& pa$a la& po&ible&cobi(acio(e& %e i("e$ace& "4e$(e" &e$iale& e( el %i&po&i"io. ( e&"a "abla (o &e i(cl!e (i(+:( o"$o "ipo %e

i("e$a# &i bie( p!e%e 4ace$ i("e$ace& %e o"$o "ipo e( !( $o!"e$ %e"e$i(a%o. La i("e$a# BRI ISN e& !(

e>eplo. La ca%e(a e("$e pa$("e&i& e& la ab$eia"!$a le+al !e &e p!e%e !"ili#a$ e( lo& coa(%o& %e Ci&co IS

pa$a $ep$e&e("a$ la i("e$a#.

Con&i#)raciones de dispositivos

Ro)ter R

1;sho* run

Fuildin confiuration"""

Current confiuration : 11/2 bytes

'ersion 12"5 ser'ice timestamps debu

datetime msec ser'ice timestamps lo

datetime msec no ser'ice pass*ord-

encryption

hostname 1

boot-start-mar+er boot-end-mar+er

no aaa ne*-model

memory-siGe iomem 12

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Wiresar!

ip cef no ip'/ cef multilin+

bundle-name authenticated

interface mbedded-,er'ice-

nine66 no ip address shutdo*n

interface =iabitthernet66

no ip address shutdo*n

duple0 auto speed auto

interface =iabitthernet61 ip

address 175"1/4"1"1 522"522"522"6

duple0 auto speed auto

interface ,erial666

no ip address

shutdo*n cloc+ rate

5666666

interface ,erial661

no ip address shutdo*n

ip for*ard-protocol nd

no ip http ser'er no ip

http secure-ser'er

control-plane

line con 6 line au0 6 line 5 no acti'ation-character no e0ec

transport preferred none transport input all transport

output pad telnet rloin lapb-ta mop udptn '156 ssh stopbits

1 line 'ty 6 9

loin transport input all

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Wiresar!

scheduler allocate 56666 1666

end

Switc S,1;sho* run


Current confiuration : 1862 bytes

'ersion 12"6 no ser'ice pad ser'ice

timestamps debu datetime msec ser'ice

timestamps lo datetime msec no

ser'ice pass*ord-encryption

hostname ,1


no aaa ne*-model system

mtu routin 1266

spannin-tree mode p'st spannin-treee0tend system-id

'lan internal allocation policy ascendin

interface astthernet61





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Wiresar!

interface astthernet6/















Práctica de laboratorio: Observación del protocolo ARP mediante la CLI de Windows, la CLI del IOS y W










interface lan1 ip address 175"1/4"1"11 522"522"522"6

ip http ser'er ip http secure-ser'er

line con 6 line 'ty 2 12

end

Switc S-

,5;sho* run


Current confiuration : 1818 bytes

'ersion 12"6 no ser'ice pad ser'ice timestamps debu datetime msec

ser'ice timestamps lo datetime msec no ser'ice pass*ord-encryption

hostname ,5


no aaa ne*-model system mtu routin 1266

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spannin-tree mode p'st spannin-tree e0tend system-id

'lan internal allocation policy ascendin





















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interface lan1 ip address 175"1/4"1"15 522"522"522"6

ip http ser'er ip http secure-ser'er

line con 6 line 'ty 2 12

end

7 201 Ci&co /o &!& iliale& o%o& lo& %e$ec4o& $e&e$a%o& &"e %oc!e("o e& i(o$aci'( p:blica %e Ci&co P+i(a D %e