{"id":37049,"date":"2019-10-31T22:15:29","date_gmt":"2019-10-31T19:15:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/trening-cisco-200-125-ccna-v3-0-den-13-nastrojka-vlan\/"},"modified":"2019-10-31T22:15:29","modified_gmt":"2019-10-31T19:15:29","slug":"trening-cisco-200-125-ccna-v3-0-den-13-nastrojka-vlan","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/trening-cisco-200-125-ccna-v3-0-den-13-nastrojka-vlan","title":{"rendered":"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00cen lec\u021bia de ast\u0103zi ne vom concentra pe configur\u0103rile VLAN, adic\u0103 vom \u00eencerca s\u0103 realiz\u0103m tot ceea ce am discutat \u00een lec\u021biile anterioare. Acum vom analiza 3 \u00eentreb\u0103ri: crearea VLAN, atribuirea porturilor VLAN \u0219i vizualizarea bazei de date VLAN.<\/p>\n<p>Vom deschide fereastra programului Cisco Packet Tracer cu topologia logic\u0103 a re\u021belei noastre desenat\u0103 de mine. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/9d87d622b82d820bbbadf1160a617793.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLa primul switch SW0 sunt conectate 2 computere PC0 \u0219i PC1, unite \u00eentr-o re\u021bea VLAN10 cu domeniul de adrese IP 192.168.10.0\/24. Prin urmare, adresele IP ale acestor computere vor fi 192.168.10.1 \u0219i 192.168.10.2. De obicei, oamenii identific\u0103 num\u0103rul VLAN dup\u0103 al treilea octet al adresei IP, \u00een cazul nostru este 10, cu toate acestea, aceasta nu este o condi\u021bie obligatorie pentru denumirea re\u021belelor; pute\u021bi atribui orice identificator VLAN, \u00eens\u0103 aceast\u0103 regul\u0103 este adoptat\u0103 \u00een companiile mari, deoarece faciliteaz\u0103 configurarea re\u021belei. <\/p>\n<p>Mai departe se afl\u0103 switch-ul SW1, care este conectat la re\u021beaua VLAN20 cu adresa IP 192.168.20.0\/24, av\u00e2nd dou\u0103 laptopuri Laptop1 \u0219i Laptop2.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>VLAN10 este situat\u0103 la etajul 1 al biroului companiei \u0219i reprezint\u0103 re\u021beaua conducerii departamentului de v\u00e2nz\u0103ri. La acela\u0219i switch SW0 este conectat laptopul Laptop0 al marketerului, care apar\u021bine VLAN20. Aceast\u0103 re\u021bea se extinde la etajul 2, unde se afl\u0103 al\u021bi angaja\u021bi, \u0219i este conectat\u0103 la departamentul de v\u00e2nz\u0103ri, care poate fi situat \u00eentr-o alt\u0103 cl\u0103dire sau la etajul 3 al acelea\u0219i cl\u0103diri. Aici sunt conectate alte 3 computere \u2013 PC2, PC3 \u0219i PC4, care fac parte din re\u021beaua VLAN10.<\/p>\n<p>Re\u021beaua VLAN10, ca \u0219i VLAN20, trebuie s\u0103 asigure o comunicare ne\u00eentrerupt\u0103 \u00eentre to\u021bi angaja\u021bii, indiferent de faptul c\u0103 se afl\u0103 pe etaje diferite sau \u00een cl\u0103diri diferite. Aceast\u0103 concep\u021bie de re\u021bea o vom analiza ast\u0103zi. <\/p>\n<p>S\u0103 \u00eencepem configurarea acesteia \u0219i s\u0103 \u00eencepem cu computerul PC0. D\u00e2nd clic pe icoan\u0103, vom intra \u00een set\u0103rile de re\u021bea ale computerului \u0219i vom introduce adresa IP 192.168.10.1 \u0219i masca de subre\u021bea 255.255.255.0. Nu introduc adresa gateway-ului implicit, deoarece aceasta este necesar\u0103 pentru a ie\u0219i dintr-o re\u021bea local\u0103 \u00een alta, iar \u00een cazul nostru nu ne ocup\u0103m de set\u0103rile nivelului 3 OSI, ne intereseaz\u0103 doar nivelul 2 \u0219i nu inten\u021bion\u0103m s\u0103 discut\u0103m despre rutarea traficului \u00een alt\u0103 re\u021bea. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/17f8cbbded337e14311d8efcbdee723e.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNe preg\u0103tim s\u0103 configur\u0103m re\u021beaua intern\u0103 \u0219i doar acele gazde care fac parte din aceasta. Dup\u0103 aceea, ne vom muta la computerul PC2 \u0219i vom face acela\u0219i lucru ca pentru primul PC. Acum, s\u0103 verific\u0103m dac\u0103 pot pinge PC1 de pe computerul PC0. Dup\u0103 cum vede\u021bi, pingul trece, iar computerul cu adresa IP 192.168.10.2 returneaz\u0103 pachete cu u\u0219urin\u021b\u0103. Astfel, am stabilit cu succes o leg\u0103tur\u0103 \u00eentre PC0 \u0219i PC1 prin intermediul switch-ului. <\/p>\n<p>Pentru a \u00een\u021belege de ce ne-a reu\u0219it aceasta, s\u0103 intr\u0103m \u00een set\u0103rile switch-ului \u0219i s\u0103 ne uit\u0103m la tabelul VLAN.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/7bad9b9a3fce02345ca4b939ceb56ad7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTehnic, acest switch are 5 VLAN-uri: VLAN1 este implicit, iar apoi 1002, 1003, 1004 \u0219i 1005. Dac\u0103 ne uit\u0103m la ultimele 4 re\u021bele, putem observa c\u0103 acestea nu sunt suportate \u0219i sunt marcate ca unsupported. Acestea sunt re\u021bele virtuale ale unei vechi tehnologii \u2013 fddi, fddinet, trnet. \u00cen prezent, ele nu sunt utilizate, dar conform cerin\u021belor tehnice, \u00eenc\u0103 sunt incluse \u00een dispozitivele noi. Astfel, practic, switch-ul nostru are implicit doar o singur\u0103 re\u021bea virtual\u0103 \u2013 VLAN1, de aceea toate por\u021bile oric\u0103rui switch Cisco sunt setate pentru aceast\u0103 re\u021bea \u201edin fabric\u0103\u201d. Acestea sunt 24 de por\u021bi Fast Ethernet \u0219i 2 por\u021bi Gigabit Ethernet. Aceasta faciliteaz\u0103 semnificativ compatibilitatea noilor switch-uri, deoarece din fabric\u0103 toate fac parte din aceea\u0219i VLAN1.<\/p>\n<p>Trebuie s\u0103 reprofil\u0103m por\u021bile care sunt setate implicit s\u0103 func\u021bioneze cu VLAN1, pentru a func\u021biona cu VLAN10. Packet Tracer arat\u0103 c\u0103 \u00een cazul nostru acestea sunt por\u021bile Fa0 \u0219i Fa0\/2. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/a0f311c1b18981a451d95dc8ec00be7c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nS\u0103 ne \u00eentoarcem la switch-ul SW0 \u0219i s\u0103 configur\u0103m aceste dou\u0103 por\u021bi. Pentru aceasta, folosesc comanda configure terminal pentru a intra \u00een modul de configurare global\u0103 \u0219i introduc comanda de configurare a acestui interfa\u021b\u0103 \u2013 int fastEthernet 0\/1. Trebuie s\u0103 setez modul de func\u021bionare al acestei por\u021bi pe access, deoarece este un port de tip access, \u0219i folosesc comanda switchport mode access. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/1b87e58cfd2bbd2f051573dbd3af5e4b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAceast\u0103 port este configurat ca un port access static, dar dac\u0103 voi conecta un alt switch, datorit\u0103 utiliz\u0103rii protocoalelor DTP, acesta va trece \u00een modul trunk dinamic. Implicit, acest port apar\u021bine VLAN1, astfel \u00eenc\u00e2t trebuie s\u0103 folosesc comanda switchport access vlan 10. \u00cen acest moment, sistemul ne va da un mesaj c\u0103 VLAN10 nu exist\u0103 \u0219i c\u0103 trebuie creat. Dac\u0103 v\u0103 aminti\u021bi, \u00een baza de date VLAN avem doar o re\u021bea \u2013 VLAN1, \u0219i nu exist\u0103 nicio re\u021bea VLAN10 acolo. Dar am solicitat switch-ului s\u0103 ne ofere acces la VLAN10, a\u0219a c\u0103 am primit un mesaj de eroare.<\/p>\n<p>Prin urmare, trebuie s\u0103 cre\u0103m VLAN10 \u0219i s\u0103 atribui acest port de acces acesteia. Dup\u0103 aceea, dac\u0103 accesa\u021bi baza de date VLAN, ve\u021bi putea vedea VLAN0010 creat de cur\u00e2nd, care se afl\u0103 \u00een stare activ\u0103 \u0219i c\u0103ruia \u00eei apar\u021bine portul Fa0\/1. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/1643458c550ffee349c89844ae73ccdf.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNu am efectuat nicio modificare pe computer, ci doar am configurat portul switch-ului la care este conectat. Acum s\u0103 \u00eencerc\u0103m s\u0103 pping\u0103m adresa IP 192.168.10.2, ceea ce am reu\u0219it cu c\u00e2teva minute \u00een urm\u0103. Nu am avut succes pentru c\u0103 portul la care este conectat PC0 apar\u021bine acum re\u021belei VLAN10, iar portul legat de computerul PC1 continu\u0103 s\u0103 fie parte din VLAN1, neexist\u00e2nd nicio conexiune \u00eentre aceste dou\u0103 re\u021bele. Pentru a stabili o conexiune \u00eentre aceste computere, trebuie s\u0103 configur\u0103m ambele porturi pentru a func\u021biona cu VLAN10. Revin \u00een modul de configurare global\u0103 \u0219i execut acela\u0219i lucru pentru switchport f0\/2.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/6778fde917ff1a5fccaf37fe662841aa.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nS\u0103 ne uit\u0103m din nou la tabelul VLAN. Acum vedem c\u0103 re\u021beaua VLAN10 este configurat\u0103 pe porturile Fa0\/1 \u0219i Fa0\/2. A\u0219a cum se poate observa, ppingul trece cu succes acum, deoarece ambele porturi ale switch-ului SW0, la care sunt conectate dispozitivele, apar\u021bin acelea\u0219i re\u021bele. S\u0103 \u00eencerc\u0103m s\u0103 schimb\u0103m numele re\u021belei pentru a-i indica scopul. Dac\u0103 dorim s\u0103 facem vreo modificare \u00een VLAN, trebuie s\u0103 acces\u0103m set\u0103rile acestei re\u021bele. <\/p>\n<p>Pentru aceasta, tastez comanda vlan 10, iar voi observa\u021bi c\u0103 promptul liniei de comand\u0103 s-a schimbat de la Switch (config) # la Switch (config-vlan) #. Dac\u0103 introduc semnul \u00eentreb\u0103rii, sistemul ne va ar\u0103ta doar 3 comenzi posibile: exit, name \u0219i no. Pot s\u0103 aloc un nume re\u021belei folosind comanda name, s\u0103 revoc comenzile la starea lor implicit\u0103, tast\u00e2nd no sau s\u0103 salvez modific\u0103rile efectuate folosind comanda exit. Prin urmare, introduc comenzile name SALES \u0219i exit.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/f4d7da0ad6a5f59c3aaac31d34042e1b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDac\u0103 ne uit\u0103m la baza de date VLAN, putem verifica c\u0103 echipele noastre au fost implementate \u0219i c\u0103 fostul VLAN10 se nume\u0219te acum SALES \u2013 departamentul de v\u00e2nz\u0103ri. A\u0219adar, am conectat 2 computere din biroul nostru la re\u021beaua creat\u0103 pentru departamentul de v\u00e2nz\u0103ri. Acum trebuie s\u0103 cre\u0103m o re\u021bea pentru departamentul de marketing. Pentru a conecta acestui re\u021bea laptopul Laptop0, trebuie s\u0103 intr\u0103m \u00een set\u0103rile sale de re\u021bea \u0219i s\u0103 introducem adresa IP 192.168.20.1 \u0219i masca de subre\u021bea 255.255.255.0, iar gateway-ul implicit nu este necesar. Apoi trebuie s\u0103 ne \u00eentoarcem la set\u0103rile switch-ului, s\u0103 intr\u0103m \u00een set\u0103rile portului cu comanda int fa0\/3 \u0219i s\u0103 introducem comanda switchport mode access. Comanda urm\u0103toare va fi switchport access vlan 20. <\/p>\n<p>Primim din nou un mesaj c\u0103 VLAN-ul nu exist\u0103 \u0219i c\u0103 trebuie creat. Putem aborda alt\u0103 cale \u2013 voi ie\u0219i din set\u0103rile portului Switch (config-if), voi intra \u00een Switch (config) \u0219i voi introduce comanda vlan 20, astfel cre\u00e2nd re\u021beaua VLAN20. Cu alte cuvinte, putem crea mai \u00eent\u00e2i re\u021beaua VLAN20, s\u0103-i atribuim numele MARKETING, s\u0103 salv\u0103m modific\u0103rile cu comanda exit \u0219i apoi s\u0103 configur\u0103m portul pentru aceasta. <\/p>\n<p>Dac\u0103 intri \u00een baza VLAN cu comanda sh vlan, po\u021bi vedea re\u021beaua MARKETING pe care am creat-o \u0219i portul corespunz\u0103tor Fa0\/3. Nu voi putea s\u0103 ping laptopurile de pe acest notebook din dou\u0103 motive: avem VLAN-uri diferite \u0219i dispozitivele noastre apar\u021bin subre\u021belelor diferite. Deoarece apar\u021bin VLAN-urilor diferite, switch-ul va respinge pachetele de pe laptop care sunt direc\u021bionate c\u0103tre o alt\u0103 re\u021bea, deoarece nu are un port care apar\u021bine VLAN20. <\/p>\n<p>A\u0219a cum am spus, compania se extinde, biroul mic de la etajul \u00eent\u00e2i nu este suficient, a\u0219a c\u0103 a mutat departamentul de marketing la etajul al doilea al cl\u0103dirii, instaleaz\u0103 computere pentru 2 angaja\u021bi acolo \u0219i dore\u0219te s\u0103 asigure conexiunea cu departamentul de marketing de la etajul \u00eent\u00e2i. Pentru aceasta, trebuie mai \u00eent\u00e2i s\u0103 cre\u0103m un trunk \u00eentre cele dou\u0103 switch-uri \u2013 portul Fa0\/4 al primului switch \u0219i portul Fa0\/1 al celui de-al doilea switch. Pentru aceasta, intru \u00een set\u0103rile SW0 \u0219i introduc comenzile int f0\/4 \u0219i switchport mode trunk. <\/p>\n<p>Exist\u0103 comanda de incapsulare switchport trunk enc, totu\u0219i, \u00een noile switch-uri aceasta nu se aplic\u0103, deoarece \u00een mod implicit folosesc tehnologia de incapsulare prin protocolul 802.1q. Totu\u0219i, modelele mai vechi de switch-uri Cisco utilizau protocolul proprietar ISL, care nu mai este utilizat, deoarece acum toate switch-urile \u00een\u021beleg protocolul .1Q. Astfel, nu mai este necesar s\u0103 folosi\u021bi comanda switchport trunk enc.<\/p>\n<p>Dac\u0103 accesezi acum baza de date VLAN, po\u021bi observa c\u0103 portul Fa0\/4 a disp\u0103rut. Aceasta se \u00eent\u00e2mpl\u0103 pentru c\u0103 \u00een aceast\u0103 tabel\u0103 sunt indicate doar porturile de acces, care apar\u021bin unei VLAN specifice. Pentru a vedea porturile trunk ale switch-ului, trebuie s\u0103 folose\u0219ti comanda sh int trunk. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/9e95c63afd05ae8cfec06def103d1cc5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u00cen fereastra de comand\u0103 vedem c\u0103 portul Fa0\/4 este activat, \u00eencarc\u0103 encapsularea conform protocoalelor 802.1q \u0219i apar\u021bine native vlan 1. A\u0219a cum \u0219tim, dac\u0103 acest port trunk prime\u0219te trafic netagificat, \u00eel direc\u021bioneaz\u0103 automat c\u0103tre re\u021beaua native vlan 1. \u00cen lec\u021bia urm\u0103toare vom discuta despre configurarea native vlan, dar deocamdat\u0103 re\u021bine\u021bi cum arat\u0103 set\u0103rile trunk pentru acest dispozitiv.<\/p>\n<p>Acum m\u0103 voi deplasa la al doilea switch SW1, voi intra \u00een mod de configurare int f0\/1 \u0219i voi repeta secven\u021ba de configurare a portului similar cu cazul precedent. Cele dou\u0103 porturi Fa0\/2 \u0219i Fa0\/3, la care sunt conectate laptopurile angaja\u021bilor din departamentul de marketing, trebuie s\u0103 fie configurate \u00een modul access \u0219i ad\u0103ugate la re\u021beaua VLAN20. <\/p>\n<p>\u00cen cazul anterior, am configurat individual fiecare port al switch-ului, iar acum vreau s\u0103 v\u0103 ar\u0103t cum s\u0103 accelera\u021bi acest proces folosind un \u0219ablon de comand\u0103. Po\u021bi introduce comanda pentru a configura gama de interfe\u021be int range f0\/2-3, rezult\u00e2nd \u00een apari\u021bia promptului de comand\u0103 Switch (config-if-range)#, iar tu po\u021bi introduce aceea\u0219i parametr\u0103 sau aplica aceea\u0219i comand\u0103 pentru gama specificat\u0103 de porturi, de exemplu, simultan pentru 20 de porturi. <\/p>\n<p>\u00cen exemplul precedent, am folosit de mai multe ori acelea\u0219i comenzi switchport mode access \u0219i switchport access vlan 10 pentru mai multe porturi ale switch-ului. Aceste comenzi pot fi introduse o singur\u0103 dat\u0103, dac\u0103 folose\u0219ti gama de porturi. Acum voi introduce comenzile switchport mode access \u0219i switchport access vlan 20 pentru gama de porturi selectat\u0103. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/44de481d240ca1f059e5d62a8e9fb5d5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDeoarece re\u021beaua VLAN20 nu exist\u0103 deocamdat\u0103, sistemul o va crea automat. Tast\u0103m exit pentru a salva modific\u0103rile efectuate \u0219i cerem s\u0103 ne arate tabela VLAN. Dup\u0103 cum vezi, acum porturile Fa0\/2 \u0219i Fa0\/3 fac parte din VLAN20 tocmai creat. <\/p>\n<p>Acum voi configura adresele IP ale laptopurilor de la etajul al doilea al biroului nostru: Laptop1 va primi adresa 192.168.20.2 \u0219i masca de subre\u021bea 255.255.255.0, iar Laptop2 va primi adresa IP 192.168.20.3. S\u0103 verific\u0103m func\u021bionalitatea re\u021belei ping\u00e2nd primul laptop de la al doilea. A\u0219a cum pute\u021bi vedea, pingul trece cu succes, deoarece ambele dispozitive fac parte din aceea\u0219i VLAN \u0219i sunt conectate la acela\u0219i switch. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/690f2213143c16b361e8ca82deab7c12.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nCu toate acestea, laptopurile din departamentul de marketing de la etajele \u00eent\u00e2i \u0219i doi sunt conectate la switch-uri diferite, de\u0219i se afl\u0103 \u00een aceea\u0219i re\u021bea VLAN. S\u0103 verific\u0103m cum este asigurat\u0103 comunicarea \u00eentre ele, pentru aceasta voi face ping de la Laptop2 c\u0103tre laptopul de la primul etaj, care are adresa IP 192.168.20.1. A\u0219a cum pute\u021bi vedea, totul func\u021bioneaz\u0103 f\u0103r\u0103 probleme \u00een ciuda faptului c\u0103 laptopurile sunt conectate la switch-uri diferite. Comunicarea se realizeaz\u0103 datorit\u0103 faptului c\u0103 ambele switch-uri sunt conectate printr-un trunk. <\/p>\n<p>Pot stabili o conexiune \u00eentre Laptop2 \u0219i computerul PC0? Nu, nu pot, deoarece apar\u021bin VLAN-uri diferite. Acum s\u0103 configur\u0103m re\u021beaua pentru computerele PC2,3,4, pentru care mai \u00eent\u00e2i vom crea un trunk \u00eentre switch-ul secundar Fa0\/4 \u0219i switch-ul ter\u021b Fa0\/1. <\/p>\n<p>Intru \u00een set\u0103rile SW1 \u0219i tastez comanda config t, dup\u0103 care selectez int f0\/4, apoi introduc comenzile switchport mode trunk \u0219i exit. \u00cen mod similar, configurez al treilea switch SW2. Am creat un trunk \u0219i vede\u021bi c\u0103, dup\u0103 ce set\u0103rile au intrat \u00een vigoare, culoarea porturilor s-a schimbat de la portocalie la verde. Acum trebuie s\u0103 configurez por\u021bile Fa0\/2,0\/3,0\/4, la care sunt conectate computerele din departamentul de v\u00e2nz\u0103ri, care apar\u021bin re\u021belei VLAN10. Pentru aceasta, intru \u00een set\u0103rile switch-ului SW2, selectez intervalul de porturi f0\/2-4 \u0219i aplic comenzile switchport mode access \u0219i switchport access vlan 10. Deoarece pe aceste porturi re\u021beaua VLAN10 nu exist\u0103, aceasta este creat\u0103 automat de sistem. Dac\u0103 privim baza de date VLAN a acestui switch, putem observa c\u0103 acum porturile Fa0\/2,0\/3,0\/4 apar\u021bin re\u021belei VLAN10. <\/p>\n<p>Dup\u0103 aceasta, este necesar s\u0103 configur\u0103m re\u021beaua pentru fiecare dintre cele 3 computere, introduc\u00e2nd adresele IP \u0219i m\u0103\u0219tile de subre\u021bea. PC2 prime\u0219te adresa 192.168.10.3, PC3 \u2013 adresa 192.168.10.4, iar PC4 \u2013 adresa IP 192.168.10.5. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/e0b45bbd05f2941dc8d89fb97a6b3e37.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPentru a r\u0103spunde la \u00eentrebarea dac\u0103 re\u021beaua noastr\u0103 func\u021bioneaz\u0103, vom face ping de la computerul PC4 de la etajul 3 c\u0103tre computerul PC0 de la etajul 1 sau dintr-o alt\u0103 cl\u0103dire. Ping-ul s-a \u00eencheiat cu insucces, a\u0219a c\u0103 s\u0103 \u00eencerc\u0103m s\u0103 \u00een\u021belegem de ce acest lucru nu a fost posibil.<\/p>\n<p>C\u00e2nd am \u00eencercat s\u0103 facem ping Laptop0 de pe laptopul Laptop2, totul a func\u021bionat perfect, de\u0219i laptopurile erau conectate la switch-uri diferite. De ce acum, c\u00e2nd calculatoarele din departamentul de v\u00e2nz\u0103ri sunt la fel de exact conectate la switch-uri diferite, legate printr-un trunk, ping-ul nu trece? Pentru a \u00een\u021belege cauza problemei, trebuie s\u0103 ne amintim cum func\u021bioneaz\u0103 un switch. <\/p>\n<p>C\u00e2nd trimitem un pachet de pe computerul PC4 la switch-ul SW2, acesta observ\u0103 c\u0103 pachetul ajunge pe portul Fa0\/4. Switch-ul \u00ee\u0219i verific\u0103 baza de date \u0219i descoper\u0103 c\u0103 portul Fa0\/4 face parte din re\u021beaua VLAN10. Apoi, switch-ul eticheteaz\u0103 cadrul cu num\u0103rul re\u021belei, adic\u0103 ata\u0219eaz\u0103 la pachetul de trafic un antet VLAN10 \u0219i \u00eel trimite prin trunk c\u0103tre al doilea switch, SW1. Acest switch \"cite\u0219te\" antetul \u0219i observ\u0103 c\u0103 pachetul este destinat re\u021belei VLAN10, se uit\u0103 \u00een baza sa de date VLAN \u0219i, nefiind g\u0103sit\u0103 nici o VLAN10, pachetul este respins. Astfel, dispozitivele PC2, 3 \u0219i 4 pot comunica f\u0103r\u0103 probleme \u00eentre ele, dar \u00eencercarea de a stabili o conexiune cu calculatoarele PC0 \u0219i PC1 se sf\u00e2r\u0219e\u0219te f\u0103r\u0103 succes, deoarece switch-ul SW1 nu \u0219tie nimic despre re\u021beaua VLAN10. <\/p>\n<p>Putem s\u0103 remediam u\u0219or aceast\u0103 problem\u0103, acces\u00e2nd set\u0103rile SW1, cre\u00e2nd re\u021beaua VLAN10 cu comanda vlan 10 \u0219i introduc\u00e2nd denumirea MARKETING. S\u0103 \u00eencerc\u0103m s\u0103 repet\u0103m ping-ul \u2013 observa\u021bi c\u0103 primele trei pachete sunt respinse, iar al patrulea trece cu succes. Aceasta se explic\u0103 prin faptul c\u0103 switch-ul a verificat mai \u00eent\u00e2i adresele IP \u0219i a determinat adresa MAC, ceea ce a durat un anumit timp, iar cele trei pachete ini\u021biale au fost respinse din cauza timeout-ului. Acum, conexiunea este stabilit\u0103, deoarece switch-ul a completat tabela sa de adrese MAC \u0219i direc\u021bioneaz\u0103 pachetele direct c\u0103tre adresa dorit\u0103. <br \/>\nTot ce am f\u0103cut pentru a remedia problema a fost s\u0103 accesez set\u0103rile switch-ului intermediar \u0219i s\u0103 creez acolo re\u021beaua VLAN10. Astfel, chiar dac\u0103 re\u021beaua nu este direct conectat\u0103 la switch, acesta trebuie s\u0103 \u0219tie despre toate re\u021belele implicate \u00een conexiunile de re\u021bea. Cu toate acestea, dac\u0103 \u00een re\u021beaua dumneavoastr\u0103 exist\u0103 o sut\u0103 de switch-uri, nu ve\u021bi putea accesa fizic set\u0103rile fiec\u0103ruia \u0219i s\u0103 configura\u021bi manual identificatele VLAN. De aceea, folosim protocolul VTP, al c\u0103rui setare o vom discuta \u00een urm\u0103torul tutorial video. <\/p>\n<p>A\u0219adar, ast\u0103zi am discutat tot ce ne-am propus: cum s\u0103 cre\u0103m VLAN, cum s\u0103 atribuim porturi VLAN \u0219i cum s\u0103 vizualiz\u0103m baza de date VLAN. Pentru a crea re\u021bele, intr\u0103m \u00een modul de configurare global\u0103 a switch-ului \u0219i folosim comanda vlan , putem, de asemenea, s\u0103 atribuim un nume re\u021belei create cu ajutorul comenzii name . <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/1972c3b2dbc6d936ae40a4a58f5b5f2d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDe asemenea, putem crea VLAN \u00eentr-un alt mod, intr\u00e2nd \u00een modul de interfa\u021b\u0103 \u0219i folosind comanda switchport access vlan . Dac\u0103 nu exist\u0103 o re\u021bea cu acest num\u0103r, aceasta va fi creat\u0103 automat de sistem. Nu uita\u021bi s\u0103 folosi\u021bi comanda exit dup\u0103 ce a\u021bi f\u0103cut modific\u0103ri \u00een configura\u021bia ini\u021bial\u0103, altfel acestea nu se vor salva \u00een baza de date VLAN. Apoi, pute\u021bi atribui porturi re\u021belelor VLAN specifice, folosind comenzile corespunz\u0103toare.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/b6a157eec727d6727609aa15585f64d7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nComanda switchport mode access transfer\u0103 interfa\u021ba \u00een modul static access-port, dup\u0103 care num\u0103rul VLAN-ului corespunz\u0103tor este ata\u0219at portului cu comanda switchport access vlan . Pentru a vizualiza baza de date VLAN se folose\u0219te comanda show vlan, care trebuie introdus\u0103 \u00een modul EXEC utilizator. Pentru a vizualiza lista porturilor trunk, trebuie folosit\u0103 comanda show int trunk. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 13. Configurarea VLAN\" src=\"\/wp-content\/uploads\/2019\/08\/f509ce4c2965ac5a2c58cd1e9294dbe9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<center><div class=\"youtube-placeholder\" data-id=\"BtKpVcn_8ec\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/BtKpVcn_8ec\/hqdefault.jpg\" alt=\"Reda\u021bi video\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><br \/>\nV\u0103 mul\u021bumim c\u0103 r\u0103m\u00e2ne\u021bi cu noi. V\u0103 plac articolele noastre? Dori\u021bi s\u0103 vede\u021bi mai multe materiale interesante? Sus\u021bine\u021bi-ne f\u0103c\u00e2nd o comand\u0103 sau recomand\u00e2ndu-ne prietenilor. <b>30% reducere pentru utilizatorii Habr pentru un server entry-level unic, creat special pentru tine:<\/b> <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/company\/ua-hosting\/blog\/347386\/\">Adev\u0103rul despre VPS (KVM) E5-2650 v4 (6 nuclee) 10GB DDR4 240GB SSD 1Gbps de la 20$ sau cum s\u0103 \u00eemp\u0103r\u021bim corect un server?<\/a><\/noindex> (sunt disponibile op\u021biuni cu RAID1 \u0219i RAID10, p\u00e2n\u0103 la 24 nuclee \u0219i p\u00e2n\u0103 la 40GB DDR4).<\/p>\n<p><b>Dell R730xd la jum\u0103tate de pre\u021b?<\/b> Numai la noi <b><noindex><a rel=\"nofollow\" href=\"https:\/\/ua-hosting.company\/serversnl\">2 x Intel TetraDeca-Core Xeon 2x E5-2697v3 2.6GHz 14C 64GB DDR4 4x960GB SSD 1Gbps 100 TB de la 199 $<\/a><\/noindex> \u00een Olanda! <b>Dell R420 \u2014 2x E5-2430 2.2Ghz 6C 128GB DDR3 2x960GB SSD 1Gbps 100TB \u2014 de la 99 $!<\/b><\/b> Citi\u021bi despre <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/company\/ua-hosting\/blog\/329618\/\">Cum s\u0103 construi\u021bi o infrastructur\u0103 de clas\u0103 enterprise folosind servere Dell R730xd E5-2650 v4 la pre\u021buri foarte mici de 9000 \u20ac?<\/a><\/noindex><br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/463183\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u0435\u0433\u043e\u0434\u043d\u044f\u0448\u043d\u0438\u0439 \u0443\u0440\u043e\u043a \u043c\u044b \u043f\u043e\u0441\u0432\u044f\u0442\u0438\u043c \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u043c VLAN, \u0442\u043e \u0435\u0441\u0442\u044c \u043f\u043e\u043f\u0440\u043e\u0431\u0443\u0435\u043c \u043f\u0440\u043e\u0434\u0435\u043b\u0430\u0442\u044c \u0432\u0441\u0451 \u0442\u043e, \u043e \u0447\u0435\u043c \u0433\u043e\u0432\u043e\u0440\u0438\u043b\u0438 \u043d\u0430 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445 \u0443\u0440\u043e\u043a\u0430\u0445. \u0421\u0435\u0439\u0447\u0430\u0441 \u043c\u044b \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c 3 \u0432\u043e\u043f\u0440\u043e\u0441\u0430: \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 VLAN, \u043f\u0440\u0438\u0441\u0432\u0430\u0438\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0440\u0442\u043e\u0432 VLAN \u0438 \u043f\u0440\u043e\u0441\u043c\u043e\u0442\u0440 \u0431\u0430\u0437\u044b \u0434\u0430\u043d\u043d\u044b\u0445 VLAN. \u041e\u0442\u043a\u0440\u043e\u0435\u043c \u043e\u043a\u043d\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b Cisco Packer tracer \u0441 \u043d\u0430\u0440\u0438\u0441\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043c\u043d\u043e\u044e \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0442\u043e\u043f\u043e\u043b\u043e\u0433\u0438\u0435\u0439 \u043d\u0430\u0448\u0435\u0439 \u0441\u0435\u0442\u0438. \u041a \u043f\u0435\u0440\u0432\u043e\u043c\u0443 \u0441\u0432\u0438\u0442\u0447\u0443 SW0 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u044b 2 \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u0430 PC0 \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27773,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-37049","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - 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