{"id":37888,"date":"2019-10-31T22:20:23","date_gmt":"2019-10-31T19:20:23","guid":{"rendered":"https:\/\/prohoster.info\/blog\/trening-cisco-200-125-ccna-v3-0-den-34-rasshirennaya-kontseptsiya-vlan\/"},"modified":"2019-10-31T22:20:23","modified_gmt":"2019-10-31T19:20:23","slug":"trening-cisco-200-125-ccna-v3-0-den-34-rasshirennaya-kontseptsiya-vlan","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/trening-cisco-200-125-ccna-v3-0-den-34-rasshirennaya-kontseptsiya-vlan","title":{"rendered":"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Am discutat deja despre re\u021belele locale VLAN \u00een lec\u021biile video Zilele 11, 12 \u0219i 13 \u0219i ast\u0103zi vom continua studiul lor conform tematicii ICND2. Am \u00eenregistrat un video anterior care a marcat finalizarea preg\u0103tirii pentru examenul ICND1 acum c\u00e2teva luni, \u0219i \u00een tot acest timp p\u00e2n\u0103 \u00een prezent am fost foarte ocupat. Cred c\u0103 mul\u021bi dintre voi a\u021bi trecut cu succes acest examen, iar cei care au am\u00e2nat testarea pot a\u0219tepta finalizarea celei de-a doua p\u0103r\u021bi a cursului \u0219i pot \u00eencerca s\u0103 treac\u0103 examenul complex CCNA 200-125.<\/p>\n<p>Prin lec\u021bia video de ast\u0103zi \u201eZiua 34\u201d \u00eencepem tematica cursului ICND2. Mul\u021bi m\u0103 \u00eentreab\u0103 de ce nu am discutat despre OSPF \u0219i EIGRP. Problema este c\u0103 aceste protocoale nu sunt incluse \u00een tematica cursului ICND1 \u0219i sunt studiate \u00een preg\u0103tirea pentru examenul ICND2. \u00cencep\u00e2nd de ast\u0103zi, vom aborda temele din a doua parte a cursului \u0219i, desigur, vom studia protocoalele OSPF \u0219i EIGRP. \u00cenainte de a \u00eencepe subiectul de ast\u0103zi, vreau s\u0103 vorbesc despre structurarea lec\u021biilor noastre video. C\u00e2nd am prezentat tematica ICND1, nu am urmat \u0219abloanele acceptate, ci am explicat logic materialul, deoarece am considerat c\u0103 aceast\u0103 abordare este mai u\u0219or de \u00een\u021beles. Acum, c\u00e2nd studiem ICND2, la cererea studen\u021bilor, voi prezenta materialul de studiu conform planului de \u00eenv\u0103\u021bare \u0219i programului cursului Cisco.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>Dac\u0103 accesa\u021bi site-ul companiei, ve\u021bi putea vedea acest plan \u0219i c\u0103 \u00eentregul curs este \u00eemp\u0103r\u021bit \u00een 5 p\u0103r\u021bi principale: <\/p>\n<p> \u2014 Tehnologii de comutare a re\u021belelor locale (26% din materialul de studiu);<br \/>\n \u2014 Tehnologii de rutare (29%);<br \/>\n \u2014 Tehnologii de re\u021bele globale (16%);<br \/>\n \u2014 Servicii de infrastructur\u0103 (14%);<br \/>\n \u2014 \u00centre\u021binerea infrastructurii (15%).<\/p>\n<p>Voi \u00eencepe cu prima parte. Dac\u0103 ap\u0103sa\u021bi pe meniul derulant din dreapta, pute\u021bi vedea tematica detaliat\u0103 a acestei sec\u021biuni. Lec\u021bia video de ast\u0103zi va acoperi subiectul sec\u021biunii 1.1: \u201eConfigurarea, verificarea \u0219i depanarea re\u021belelor VLAN (standard \/ extensiv), care acoper\u0103 mai multe switch-uri\u201d \u0219i subsec\u021biunile 1.1a \u201ePorturi de acces (date \u0219i mesaje vocale)\u201d \u0219i 1.1.b \u201eVLAN implicit\u201d.<\/p>\n<p>\u00cen continuare, voi \u00eencerca s\u0103 respect aceea\u0219i abordare de expunere, adic\u0103 fiecare lec\u021bie video va fi dedicat\u0103 unei sec\u021biuni cu subsec\u021biuni, iar dac\u0103 materialul va fi insuficient, voi combina \u00eentr-o singur\u0103 lec\u021bie teme din mai multe sec\u021biuni, de exemplu, 1.2 \u0219i 1.3. Dac\u0103 materialul sec\u021biunii va fi abundent, \u00eel voi \u00eemp\u0103r\u021bi \u00een dou\u0103 videoclipuri. \u00cen orice caz, vom urma programa cursului, iar voi ve\u021bi putea compara cu u\u0219urin\u021b\u0103 \u00eenregistr\u0103rile voastre cu planul de \u00eenv\u0103\u021b\u0103m\u00e2nt Cisco. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/e671e79c1e89fa800e14627045986689.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPe ecran vede\u021bi noul meu desktop, care este Windows 10. Dac\u0103 dori\u021bi s\u0103 v\u0103 \u00eembun\u0103t\u0103\u021bi\u021bi desktopul cu diferite widget-uri, pute\u021bi viziona videoclipul meu intitulat \u201ePimp Your Desktop\u201d, \u00een care explic cum s\u0103 personaliza\u021bi desktopul computerului conform nevoilor voastre. Videoclipuri de acest tip le public pe un alt canal, ExplainWorld, a\u0219a c\u0103 pute\u021bi folosi linkul din col\u021bul din dreapta sus pentru a viziona con\u021binutul.<\/p>\n<p>\u00cenainte de a \u00eencepe lec\u021bia, v\u0103 rog s\u0103 nu uita\u021bi s\u0103 distribui\u021bi videoclipurile mele \u0219i s\u0103 le aprecia\u021bi. Vreau s\u0103 v\u0103 reamintesc, de asemenea, contactele noastre \u00een re\u021belele sociale \u0219i linkurile c\u0103tre paginile mele personale. M\u0103 pute\u021bi contacta prin email, iar a\u0219a cum am mai spus, prioritate la primirea unui r\u0103spuns personal din partea mea vor avea persoanele care au f\u0103cut o dona\u021bie pe site-ul nostru. <\/p>\n<p>Dac\u0103 nu a\u021bi f\u0103cut dona\u021bii, nu v\u0103 face\u021bi griji, pute\u021bi l\u0103sa comentarii sub lec\u021biile video de pe canalul YouTube, iar eu voi r\u0103spunde pe m\u0103sur\u0103 ce voi avea timp. <\/p>\n<p>A\u0219adar, ast\u0103zi, conform programului Cisco, vom discuta 3 \u00eentreb\u0103ri: vom compara Default VLAN, sau VLAN-ul implicit, cu Native VLAN, sau VLAN-ul \u201enativ\u201d, vom afla care este diferen\u021ba dintre Normal VLAN (range-ul normal de VLAN-uri) \u0219i Extended VLAN (range-ul extins de re\u021bele) \u0219i vom analiza diferen\u021ba dintre Data VLAN (VLAN de date) \u0219i Voice VLAN (VLAN de voce). A\u0219a cum am spus, am discutat deja aceast\u0103 tem\u0103 \u00een episoadele anterioare, dar destul de superficial, a\u0219a c\u0103 p\u00e2n\u0103 acum, mul\u021bi elevi \u00eent\u00e2mpin\u0103 dificult\u0103\u021bi \u00een a distinge \u00eentre tipurile de VLAN. Ast\u0103zi, voi explica astfel \u00eenc\u00e2t s\u0103 fie clar pentru toat\u0103 lumea. <\/p>\n<p>S\u0103 analiz\u0103m \u00een ce const\u0103 diferen\u021ba dintre Default VLAN \u0219i Native VLAN. Dac\u0103 ve\u021bi lua un switch Cisco complet nou, cu set\u0103rile din fabric\u0103, acesta va avea 5 VLAN-uri \u2013 VLAN1, VLAN1002, VLAN1003, VLAN1004 \u0219i VLAN1005. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/412c9dc2fd7f358474d21c027c3e3cb7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVLAN1 este VLAN-ul implicit pentru toate dispozitivele Cisco, iar VLAN-urile 1002-1005 sunt rezervate pentru Token Ring \u0219i FDDI. VLAN1 nu poate fi \u0219ters sau redenumit, nu se pot ad\u0103uga interfe\u021be la el, iar toate porturile switch-ului sunt atribuite implicit acestei re\u021bele, p\u00e2n\u0103 c\u00e2nd nu sunt configurate diferit. Implicit, toate switch-urile pot comunica \u00eentre ele, deoarece toate fac parte din VLAN1. Aceasta este ceea ce \u00eenseamn\u0103 \"VLAN implicit\" sau Default VLAN.<\/p>\n<p>Dac\u0103 accesa\u021bi set\u0103rile switch-ului SW1 \u0219i aloca\u021bi dou\u0103 interfe\u021be re\u021belei VLAN20, acestea vor deveni parte a re\u021belei VLAN20. \u00cenainte de a \u00eencepe lec\u021bia de ast\u0103zi, v\u0103 sf\u0103tuiesc insistent s\u0103 revizui\u021bi seriile men\u021bionate mai sus, 11, 12 \u0219i 13, deoarece nu voi repeta ce este un VLAN \u0219i cum func\u021bioneaz\u0103 acestea. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/eb305f15741bff201a23355d28331161.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVreau s\u0103 reamintesc c\u0103 nu se pot aloca automat interfe\u021be re\u021belei VLAN20, p\u00e2n\u0103 c\u00e2nd aceasta nu este creat\u0103, a\u0219a c\u0103 este necesar s\u0103 accesa\u021bi modul de configurare global a switch-ului \u0219i s\u0103 crea\u021bi VLAN20. Pute\u021bi arunca o privire pe consola de set\u0103ri CLI \u0219i s\u0103 \u00een\u021belege\u021bi la ce m\u0103 refer. Dup\u0103 ce a\u021bi alocat aceste 2 porturi pentru a lucra cu VLAN20, computerul PC1 \u0219i PC2 vor putea comunica \u00eentre ele deoarece ambele vor apar\u021bine acelea\u0219i re\u021bele VLAN20. Dar computerul PC3 va fi \u00eenc\u0103 parte din VLAN1 \u0219i, prin urmare, nu va putea comunica cu computerele din re\u021beaua VLAN20. <\/p>\n<p>Avem un al doilea switch, SW2, unul dintre interfe\u021bele sale fiind alocat pentru a lucra cu VLAN20, iar la acest port este conectat computerul PC5. Cu un astfel de tip de conexiune, PC5 nu poate comunica cu PC4 \u0219i PC6, \u00eens\u0103 aceste dou\u0103 computere pot comunica \u00eentre ele, deoarece apar\u021bin acelea\u0219i re\u021bele VLAN1. <\/p>\n<p>Cele dou\u0103 switch-uri sunt conectate printr-un trunk prin intermediul porturilor configurate corespunz\u0103tor. Nu voi repeta ce am spus, dar voi men\u021biona c\u0103 toate porturile switch-ului sunt configurate implicit pe modul trunking prin protocolul DTP. Dac\u0103 conecta\u021bi un computer la un port, acesta va folosi modul access. Dac\u0103 dori\u021bi s\u0103 schimba\u021bi \u00een acest mod portul la care este conectat PC3, va trebui s\u0103 introduce\u021bi comanda switchport mode access. <\/p>\n<p>\u00cempreun\u0103, dac\u0103 conecta\u021bi dou\u0103 switch-uri, acestea vor forma un trunk. Cele dou\u0103 porturi superioare ale SW1 vor permite traficul doar VLAN20, portul inferior \u2013 doar traficul VLAN1, dar conexiunea trunk va permite tot traficul care trece prin switch. Astfel, SW2 va primi traficul din VLAN1 \u0219i VLAN20. <\/p>\n<p>A\u0219a cum v\u0103 aminti\u021bi, re\u021belele VLAN au o semnifica\u021bie local\u0103. Prin urmare, SW2 \u0219tie c\u0103 traficul care ajunge pe portul VLAN1 de la PC4 poate fi trimis c\u0103tre PC6 doar printr-un port care apar\u021bine de asemenea VLAN1. Totu\u0219i, atunci c\u00e2nd un switch trimite trafic unui alt switch printr-un trunk, trebuie s\u0103 foloseasc\u0103 un mecanism care s\u0103 explice celui de-al doilea switch ce tip de trafic este. Ca un astfel de mecanism este utilizat\u0103 re\u021beaua Native VLAN, care este conectat\u0103 la portul trunk \u0219i permite trafic etichetat. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/84745e25b106958c42201ddace64df8c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>A\u0219a cum am spus, switch-ul are doar o singur\u0103 re\u021bea care nu este supus\u0103 modific\u0103rilor - aceasta este re\u021beaua implicit\u0103 VLAN1. Dar implicit, Native VLAN este VLAN1. Ce este Native VLAN? Aceasta este re\u021beaua care permite trafic netichetat VLAN1, dar de \u00eendat\u0103 ce pe portul trunk ajunge trafic din orice alt\u0103 re\u021bea, \u00een cazul nostru VLAN20, este obligatoriu s\u0103 fie etichetat. Fiecare cadru are adresa de destina\u021bie DA, adresa surs\u0103 SA \u0219i eticheta VLAN, care con\u021bine identificatorul re\u021belei VLAN ID. \u00cen cazul nostru, acest identificator arat\u0103 c\u0103 traficul respectiv se refer\u0103 la VLAN20, prin urmare poate fi trimis doar prin portul VLAN20 \u0219i destinat pentru PC5. Se poate spune c\u0103 Native VLAN decide dac\u0103 traficul trebuie s\u0103 fie etichetat sau netichetat. <\/p>\n<p>Re\u021bine\u021bi c\u0103 VLAN1 este implicit re\u021beaua Native VLAN, deoarece implicit toate porturile folosesc VLAN1 ca Native VLAN pentru transmiterea traficului netichetat. Totu\u0219i, re\u021beaua Default VLAN este doar VLAN1, singura re\u021bea care nu poate fi modificat\u0103. Dac\u0103 switch-ul prime\u0219te cadre netichetate pe portul trunk, acesta le asociaz\u0103 automat cu Native VLAN. <\/p>\n<p>Pe scurt, \u00een switch-urile Cisco, orice VLAN, de exemplu, VLAN20, poate fi folosit ca Native VLAN, iar VLAN1 poate fi folosit doar ca Default VLAN. <\/p>\n<p>\u00cen acest caz, poate ap\u0103rea o problem\u0103. Dac\u0103 schimb\u0103m VLAN-ul nativ pentru portul de trunk al primului switch \u00een VLAN20, portul va considera: \u201edeoarece acesta este VLAN-ul nativ, nu este nevoie s\u0103 etichetez traficul\u201d \u0219i va trimite traficul netagged al re\u021belei VLAN20 pe trunk c\u0103tre al doilea switch. Switch-ul SW2, primind acest trafic, va spune: \u201eexcelent, acest trafic nu are eticheta. Conform set\u0103rilor mele, VLAN-ul meu nativ este VLAN1, deci trebuie s\u0103 trimit acest trafic netagged prin re\u021beaua VLAN1\u201d. Astfel, SW2 va direc\u021biona traficul primit doar c\u0103tre PC4 \u0219i PC-6, de\u0219i acesta este destinat PC5. Aceasta va crea o problem\u0103 mare de securitate, deoarece va amesteca traficul VLAN. De aceea, este \u00eentotdeauna necesar s\u0103 se configureze acela\u0219i VLAN nativ pe ambele porturi de trunk, adic\u0103, dac\u0103 VLAN-ul nativ pentru portul de trunk al SW1 este VLAN20, aceea\u0219i VLAN20 trebuie configurat\u0103 ca VLAN nativ pe portul de trunk al SW2. <\/p>\n<p>Iat\u0103 \u00een ce const\u0103 diferen\u021ba \u00eentre VLAN-ul nativ \u0219i VLAN-ul implicit, \u0219i trebuie s\u0103 re\u021bine\u021bi c\u0103 toate VLAN-urile native din trunk trebuie s\u0103 fie acelea\u0219i (not\u0103 a translatorului: prin urmare, este mai bine s\u0103 folosi\u021bi o re\u021bea diferit\u0103 de VLAN1 ca VLAN nativ). <\/p>\n<p>S\u0103 ne uit\u0103m la asta din perspectiva switch-ului. Pute\u021bi accesa switch-ul \u0219i tasta\u021bi comanda show vlan brief, dup\u0103 care ve\u021bi observa c\u0103 toate porturile switch-ului sunt conectate la VLAN-ul implicit 1.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/aec028a9aac7f7a8902a9f4524f4e62a.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMai jos sunt prezentate \u00eenc\u0103 patru re\u021bele VLAN: 1002, 1003, 1004 \u0219i 1005. Acestea sunt de asemenea VLAN-uri implicite, pute\u021bi observa acest lucru din denumirea lor. Ele sunt re\u021bele implicite, deoarece sunt rezervate pentru anumite standarde de re\u021bea \u2014 Token Ring \u0219i FDDI. Dup\u0103 cum pute\u021bi vedea, acestea sunt active, dar nu sunt suportate, deoarece la switch nu sunt conectate re\u021belele men\u021bionate. <\/p>\n<p>Denumirea \u201edefault\u201d pentru re\u021beaua VLAN 1 nu poate fi schimbat\u0103, deoarece aceasta este re\u021beaua implicit\u0103. Deoarece, \u00een mod implicit, toate porturile switch-ului apar\u021bin acestei re\u021bele, toate switch-urile se pot conecta \u00eentre ele implicit, adic\u0103 f\u0103r\u0103 a fi necesar\u0103 o configurare suplimentar\u0103 a porturilor. Dac\u0103 dori\u021bi s\u0103 conecta\u021bi un switch la o alt\u0103 re\u021bea, intra\u021bi \u00een modul de configurare global\u0103 \u0219i crea\u021bi aceast\u0103 re\u021bea, de exemplu, VLAN20. Dup\u0103 ap\u0103sarea pe \u201eEnter\u201d, ve\u021bi accesa set\u0103rile re\u021belei create \u0219i pute\u021bi atribui un nume, de exemplu, Management, dup\u0103 care ie\u0219i\u021bi din set\u0103ri.<\/p>\n<p>Dac\u0103 acum folosim comanda show vlan brief, vom vedea c\u0103 avem o nou\u0103 re\u021bea VLAN20, pentru care nu este asociat niciunul dintre porturile switch-ului. Pentru a aloca aceast\u0103 re\u021bea unui port specific, trebuie s\u0103 select\u0103m interfa\u021ba, de exemplu, int e0\/1, s\u0103 intr\u0103m \u00een set\u0103rile acestui port \u0219i s\u0103 introducem comenzile switchport mode access \u0219i switchport access vlan20. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/4a898aa3e3ff92ec0ba8b9b26d4afc60.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n <br \/>\nDac\u0103 cerem sistemului s\u0103 arate starea re\u021belelor VLAN, vom vedea c\u0103 acum portul Ethernet 0\/1 este destinat re\u021belei Management, adic\u0103 a fost mutat automat aici din zona porturilor destinate implicit pentru VLAN1.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/1388c0f69b853264069777c4263abfb6.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAminti\u021bi-v\u0103 c\u0103 fiecare port de acces poate avea doar o singur\u0103 Data VLAN, astfel c\u0103 nu poate deservi dou\u0103 re\u021bele VLAN \u00een acela\u0219i timp. <\/p>\n<p>Acum s\u0103 ne uit\u0103m la Native VLAN. Folosesc comanda show int trunk \u0219i v\u0103d c\u0103 portul Ethernet0\/0 este alocat pentru trunk. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/c4ebe5496940f94243eaf594f3159854.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNu a fost nevoie s\u0103 fac acest lucru manual, deoarece protocolul DTP a alocat automat aceast\u0103 interfa\u021b\u0103 pentru trunking. Portul se afl\u0103 \u00een modul desirable, \u00eencapsularea este de tip n-isl, iar starea portului este \u2013 trunking, re\u021beaua \u2013 Native VLAN1. <\/p>\n<p>Urm\u0103torul este intervalul valid pentru numerele re\u021belelor VLAN 1-4094 pentru trunking \u0219i indic\u0103 faptul c\u0103 func\u021bioneaz\u0103 re\u021belele VLAN1 \u0219i VLAN20. Acum voi intra \u00een modul de configurare global\u0103 \u0219i voi introduce comanda int e0\/0, cu ajutorul c\u0103reia voi accesa set\u0103rile acestei interfe\u021be. \u00cencerc s\u0103 programez manual acest port pentru a func\u021biona \u00een modul trunk cu comanda switchport mode trunk, dar sistemul nu accept\u0103 comanda, r\u0103spunz\u00e2nd c\u0103: \u201einterfa\u021ba cu modul automat de \u00eencapsulare trunk nu poate fi trecut\u0103 \u00een modul \u00abtrunk\u00bb.\u201d <\/p>\n<p>Prin urmare, trebuie mai \u00eent\u00e2i s\u0103 configurez tipul de \u00eencapsulare trunk, pentru care folosesc comanda switchport trunk encapsulation. Sistemul a furnizat sugestii cu posibilele parametrii ai acestei comenzi:<\/p>\n<p>dot1q \u2014 \u00een timpul trunking-ului, portul utilizeaz\u0103 \u00eencapsularea trunk standard 802.1q;<br \/>\nisl \u2014 \u00een timpul trunking-ului, portul utilizeaz\u0103 \u00eencapsularea trunk doar a protocolului proprietar Cisco ISL;<br \/>\nnegotiate \u2013 dispozitivul realizeaz\u0103 \u00eencapsularea trunk cu orice dispozitiv conectat la acest port.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/ae89c7fc3fb3f7dcd904a9669d315b61.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLa fiecare cap\u0103t al trunk-ului trebuie s\u0103 fie selectat acela\u0219i tip de encapsulare. Implicit, switch-ul \u201edin cutie\u201d suport\u0103 doar trunking de tip dot1q, deoarece acest standard este suportat de aproape toate dispozitivele de re\u021bea. Voi programa interfa\u021ba noastr\u0103 pentru encapsularea trunking conform acestui standard utiliz\u00e2nd comanda switchport trunk encapsulation dot1q, dup\u0103 care voi folosi comanda switchport mode trunk anterioar\u0103. Acum, portul nostru este programat \u00een modul trunk. <\/p>\n<p>Dac\u0103 trunk-ul este format din dou\u0103 switch-uri Cisco, implicit se va folosi protocolul proprietar ISL. Dac\u0103 un switch suport\u0103 dot1q \u0219i ISL, iar cel\u0103lalt doar dot1q, trunk-ul va fi automat transformat \u00een modul de encapsulare dot1q. Dac\u0103 ne uit\u0103m din nou la op\u021biunile de trunking, vom observa c\u0103 acum modul de encapsulare a trunking-ului interfe\u021bei Et0\/0 s-a schimbat de la n-isl la 802.1q.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/c1b9209651e74f7c842e9e796b21ae47.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDac\u0103 introducem comanda show int e0\/0 switchport, vom vedea toate parametrii st\u0103rii acestui port. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/74fed7efe5ef0bcfc589bd96fec51848.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nObserva\u021bi c\u0103, implicit, VLAN1 este pentru trunking \u201ere\u021beaua nativ\u0103\u201d Native VLAN \u0219i, de asemenea, este posibil modul de etichetare a traficului Native VLAN. Apoi, folosesc comanda int e0\/0, intru \u00een set\u0103rile acestei interfe\u021be \u0219i introduc switchport trunk, dup\u0103 care sistemul \u00eemi ofer\u0103 sugestii pentru parametrii posibili ai acestei comenzi. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/2f9d539fa5e1c8cda423dfe6dd29c958.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAllowed \u00eenseamn\u0103 c\u0103, dac\u0103 portul este \u00een modul trunk, vor fi stabilite caracteristicile VLAN permise. Encapsulation activeaz\u0103 encapsularea trunking-ului, dac\u0103 portul este \u00een modul trunk. Folosesc parametrul native, care \u00eenseamn\u0103 c\u0103, \u00een modul trunk, vor fi stabilite caracteristicile native pentru port, \u0219i introduc comanda switchport trunk native VLAN20. Astfel, \u00een modul trunk, VLAN20 va fi Native VLAN pentru acest port al primului switch SW1.<\/p>\n<p>Avem un alt switch, SW2, care pentru portul s\u0103u trunk utilizeaz\u0103 VLAN1 ca Native VLAN. Acum observa\u021bi c\u0103 protocolul CDP afi\u0219eaz\u0103 un mesaj c\u0103 a fost detectat\u0103 o nepotrivire a Native VLAN pe ambele capete ale trunk-ului: portul trunk al primului switch Ethernet0\/0 folose\u0219te Native VLAN20, iar portul trunk al celui de-al doilea \u2014 Native VLAN1. Acest lucru ilustreaz\u0103 diferen\u021ba dintre Native VLAN \u0219i Default VLAN. <\/p>\n<p>Hai s\u0103 \u00eencepem s\u0103 discut\u0103m despre intervalele de re\u021bea VLAN obi\u0219nuite \u0219i extinse.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/8bcd32eb12fedfc8b63ef6bc8aa0e4ea.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMult timp, Cisco a sus\u021binut doar gama de numere VLAN de la 1 la 1005, iar intervalul de la 1002 la 1005 a fost rezervat implicit pentru VLAN Token Ring \u0219i FDDI. Aceste re\u021bele erau numite VLAN-uri obi\u0219nuite. Dac\u0103 v\u0103 aminti\u021bi, VLAN ID este o etichet\u0103 de 12 bi\u021bi care permite stabilirea unui num\u0103r de p\u00e2n\u0103 la 4096, totu\u0219i, din motive de compatibilitate, Cisco a folosit numere doar p\u00e2n\u0103 la 1005. <\/p>\n<p>Gama extins\u0103 de VLAN include numere de la 1006 la 4095. Poate fi utilizat\u0103 pe echipamentele mai vechi doar dac\u0103 acestea suport\u0103 VTP v3. Dac\u0103 folosi\u021bi VTP v3 \u0219i gama extins\u0103 de VLAN, trebuie s\u0103 dezactiva\u021bi suportul pentru VTP v1 \u0219i v2, deoarece primele dou\u0103 versiuni nu pot func\u021biona cu VLAN care au un num\u0103r mai mare de 1005. <\/p>\n<p>A\u0219adar, dac\u0103 utiliza\u021bi VLAN extins pentru switch-uri vechi, VTP trebuie s\u0103 fie \u00een starea \u201edesable\u201d \u0219i trebuie s\u0103-l configura\u021bi manual pentru VLAN, \u00een caz contrar, nu va putea avea loc actualizarea bazei de date VLAN. Dac\u0103 inten\u021biona\u021bi s\u0103 folosi\u021bi VLAN extins cu VTP, ave\u021bi nevoie de versiunea a treia VTP.<\/p>\n<p>S\u0103 examin\u0103m starea VTP cu comanda show vtp status. Vede\u021bi c\u0103 switch-ul func\u021bioneaz\u0103 \u00een modul VTP v2, av\u00e2nd suport pentru versiunile 1 \u0219i 3. I-am atribuit un nume de domeniu nwking.org.<\/p>\n<p>Aici este important modul de gestionare VTP - server. Observa\u021bi c\u0103 num\u0103rul maxim de re\u021bele VLAN acceptate este de 1005. Astfel, se poate \u00een\u021belege c\u0103 acest switch, \u00een mod implicit, sus\u021bine doar gama obi\u0219nuit\u0103 de VLAN. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/dee236807b7eb50037f61e61a48f08b5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAcum voi introduce comanda show vlan brief \u0219i ve\u021bi vedea VLAN20 Management, care este men\u021bionat aici, deoarece face parte din baza de date VLAN.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/4f94acdf66eecbc5a81c8693957860d4.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDac\u0103 acum cer s\u0103 ar\u0103t configura\u021bia curent\u0103 a dispozitivului cu comanda show run, nu vom vedea nicio men\u021biune despre VLAN, deoarece acestea sunt con\u021binute doar \u00een baza de date VLAN. <br \/>\nMai departe, voi folosi comanda vtp mode pentru a seta modul de func\u021bionare VTP. Switch-urile mai vechi aveau doar trei parametri pentru aceast\u0103 comand\u0103: client, care transform\u0103 switch-ul \u00een mod client, server, care activeaz\u0103 modul server, \u0219i transparent, care transform\u0103 switch-ul \u00een modul \u201etransparent\u201d. Deoarece pe switch-urile vechi nu era posibil s\u0103 dezactiv\u0103m complet VTP, \u00een acest mod, switch-ul, r\u0103m\u00e2n\u00e2nd \u00een domeniul VTP, pur \u0219i simplu \u00eenceta s\u0103 primeasc\u0103 actualiz\u0103ri ale bazei de date a re\u021belelor VLAN care sosesc pe porturile sale prin protocolul VTP.<\/p>\n<p>\u00cen noile switch-uri a ap\u0103rut parametrul off, care permite dezactivarea complet\u0103 a modulului VTP. S\u0103 trecem dispozitivul \u00een modul transparent cu comanda vtp mode transparent \u0219i s\u0103 verific\u0103m din nou configura\u021bia curent\u0103. Dup\u0103 cum observa\u021bi, acum a fost ad\u0103ugat\u0103 o intrare pentru VLAN20. Astfel, dac\u0103 ad\u0103ug\u0103m o re\u021bea VLAN, al c\u0103rei num\u0103r se afl\u0103 \u00een intervalul standard VLAN de la 1 la 1005, iar VTP este \u00een modul transparent sau off, conform politicilor interne VLAN, aceast\u0103 re\u021bea va fi ad\u0103ugat\u0103 \u00een configura\u021bia curent\u0103 \u0219i \u00een baza de date a re\u021belelor locale virtuale.<\/p>\n<p>S\u0103 \u00eencerc\u0103m s\u0103 ad\u0103ug\u0103m VLAN 3000 \u0219i ve\u021bi observa c\u0103 \u00een modul transparent aceasta a ap\u0103rut \u0219i \u00een configura\u021bia curent\u0103. De obicei, dac\u0103 dorim s\u0103 ad\u0103ug\u0103m o re\u021bea din intervalul extins de VLAN, trebuie s\u0103 folosim comanda vtp version 3. Dup\u0103 cum observa\u021bi, ambele re\u021bele VLAN20 \u0219i VLAN3000 sunt afi\u0219ate \u00een configura\u021bia curent\u0103.<\/p>\n<p>Dac\u0103 ie\u0219im din modul transparent \u0219i activ\u0103m modul server cu comanda vtp mode server, apoi ne uit\u0103m din nou la configura\u021bia curent\u0103, se observ\u0103 c\u0103 \u00eenregistr\u0103rile pentru VLAN au disp\u0103rut complet. Acest lucru s-a \u00eent\u00e2mplat deoarece toate informa\u021biile despre VLAN sunt stocate doar \u00een baza de date VLAN \u0219i pot fi vizualizate doar \u00een modul transparent VTP. Deoarece am activat modul VTP v3, dup\u0103 utilizarea comenzii show vtp status, se poate vedea c\u0103 num\u0103rul maxim suportat de VLAN a crescut la 4096. <\/p>\n<p>Astfel, baza de date VTP v1 \u0219i VTP v2 suport\u0103 doar VLAN-uri standard cu numere de la 1 la 1005, iar baza de date VTP v3 include \u00eenregistr\u0103ri pentru VLAN-uri extinse cu numere de la 1 la 4096. Dac\u0103 utiliza\u021bi modul VTP transparent sau VTP off, informa\u021biile despre VLAN vor fi ad\u0103ugate \u00een configura\u021bia curent\u0103. Dac\u0103 dori\u021bi s\u0103 utiliza\u021bi intervalul extins de VLAN, dispozitivul trebuie s\u0103 fie \u00een modul VTP v3. Aceasta este diferen\u021ba dintre VLAN-urile standard \u0219i cele extinse.<\/p>\n<p>Acum vom compara VLAN-urile pentru date \u0219i VLAN-urile pentru transmisie voce. Dac\u0103 v\u0103 aminti\u021bi, am spus c\u0103 fiecare port poate apar\u021bine simultan doar unei singure VLAN. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/bc2d985bf217e993c0a276391c2e9062.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nCu toate acestea, \u00een multe cazuri, trebuie s\u0103 configur\u0103m un port pentru a lucra cu un telefon IP. Telefoanele IP Cisco moderne au un switch \u00eencorporat, astfel \u00eenc\u00e2t pute\u021bi conecta telefonul direct la priza de perete cu un cablu \u0219i la computer cu un cablu patch. Problema const\u0103 \u00een faptul c\u0103 priza de perete la care este conectat portul telefonului trebuie s\u0103 aib\u0103 dou\u0103 VLAN-uri diferite. Am discutat deja \u00een lec\u021biile video 11 \u0219i 12 ce trebuie f\u0103cut pentru a evita buclele de trafic, cum se folose\u0219te conceptul de VLAN \u201enativ\u201d care permite traficul netagificat, dar acestea erau toate metode de ocolire. Solu\u021bia final\u0103 a problemei a fost conceptul de separare a VLAN-urilor pentru re\u021belele de trafic de date \u0219i re\u021belele pentru traficul vocal. <\/p>\n<p>\u00cen acest caz, combina\u021bi toate liniile telefonice \u00eentr-o VLAN vocal\u0103. \u00cen imagine se arat\u0103 c\u0103 computerele PC1 \u0219i PC2 pot apar\u021bine re\u021belei VLAN20 ro\u0219ii, computerul PC3 re\u021belei VLAN30 verzi, dar toate telefoanele IP asociate lor vor apar\u021bine acelea\u0219i re\u021bele vocale VLAN50 galbene. <\/p>\n<p>De fapt, fiecare port al switch-ului SW1 va avea simultan 2 re\u021bele VLAN \u2013 pentru date \u0219i pentru voce. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/c481dc049bcd2a703adb822c6569ff98.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA\u0219a cum am spus, VLAN-ul de acces are \u00eentotdeauna un singur VLAN, nu pute\u021bi avea dou\u0103 VLAN-uri pe un singur port. Nu pute\u021bi aplica simultan acelea\u0219i comenzi switchport access vlan 10, switchport access vlan 20 \u0219i switchport access vlan 50 pe aceea\u0219i interfa\u021b\u0103. \u00cens\u0103, pute\u021bi folosi dou\u0103 comenzi pentru aceea\u0219i interfa\u021b\u0103: comanda switchport access vlan 10 \u0219i comanda switchport voice vlan 50. A\u0219adar, deoarece telefonul IP con\u021bine un switch \u00een interior, acesta poate encapsula \u0219i trimite traficul vocal VLAN50 \u0219i \u00een acela\u0219i timp, poate primi \u0219i trimite \u00een modul switchport access traficul de date din re\u021beaua VLAN20 spre switch-ul SW1. S\u0103 vedem cum se configureaz\u0103 acest mod. <\/p>\n<p>Mai \u00eent\u00e2i vom crea re\u021beaua VLAN50, apoi vom trece la set\u0103rile interfe\u021bei Ethernet 0\/1 \u0219i o vom programa pe mod switchport mode access. Dup\u0103 aceea, introduc comenzile switchport access vlan 10 \u0219i switchport voice vlan 50 \u00een ordine.<\/p>\n<p>Am uitat s\u0103 configurez acela\u0219i mod VLAN pentru trunk, a\u0219a c\u0103 voi merge la set\u0103rile portului Ethernet 0\/0 \u0219i voi introduce comanda switchport trunk native vlan 1. Acum, voi solicita s\u0103 ar\u0103t parametrii VLAN \u0219i ve\u021bi vedea c\u0103 acum pe portul Ethernet 0\/1 avem ambele re\u021bele \u2013 VLAN 50 \u0219i VLAN20.<\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/dbdfaa1bdb502e776576fc89774daf49.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA\u0219adar, dac\u0103 observa\u021bi c\u0103 pe un port sunt dou\u0103 VLAN-uri, aceasta \u00eenseamn\u0103 c\u0103 unul dintre ele este o re\u021bea vocal\u0103 Voice VLAN. Nu poate fi un trunk, deoarece, dac\u0103 ne uit\u0103m la parametrii trunk-ului folosind comanda show int trunk, se vede c\u0103 portul trunk con\u021bine toate re\u021belele VLAN, inclusiv re\u021beaua implicit\u0103 VLAN1. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/668b0a20d4f2bde9e751b0ce9595470d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSe poate spune c\u0103, din punct de vedere tehnic, atunci c\u00e2nd crea\u021bi o re\u021bea de date \u0219i o re\u021bea vocal\u0103, fiecare dintre ace\u0219ti porturi se comport\u0103 ca un semi-trunk: pentru o re\u021bea func\u021bioneaz\u0103 ca trunk, iar pentru cealalt\u0103 ca port de acces. <\/p>\n<p>Dac\u0103 introduce\u021bi comanda show int e0\/1 switchport, pute\u021bi vedea c\u0103 unele caracteristici corespund celor dou\u0103 moduri de func\u021bionare: avem at\u00e2t access static, c\u00e2t \u0219i encapsularea trunk-ului. La acest mod de operare, re\u021beaua de date VLAN 20 Management corespunde modului de acces \u0219i simultan re\u021beaua vocal\u0103 VLAN 50 este prezent\u0103. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/59794bc040651d530a4f62448a50b0ae.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSe poate vizualiza configura\u021bia curent\u0103, care va ar\u0103ta de asemenea c\u0103 pe acest port sunt prezente re\u021belele access vlan 20 \u0219i voice vlan 50. <\/p>\n<p><img decoding=\"async\" alt=\"Instruire Cisco 200-125 CCNA v3.0. Ziua 34. Conceptul avansat de VLAN\" src=\"\/wp-content\/uploads\/2019\/09\/8cb42fb8a63eedfbae0d1b15cf8d66be.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nIat\u0103 \u00een ce const\u0103 diferen\u021ba dintre re\u021belele Data VLAN \u0219i Voice VLAN. Sper c\u0103 a\u021bi \u00een\u021beles tot ce v-am explicat, dac\u0103 nu \u2013 v\u0103 rog s\u0103 viziona\u021bi din nou acest tutorial video. <\/p>\n<p><center><div class=\"youtube-placeholder\" data-id=\"Kk61XLgPeGg\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/Kk61XLgPeGg\/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\/466347\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041c\u044b \u0443\u0436\u0435 \u0440\u0430\u0441\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u043b\u0438 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0435\u0442\u0438 VLAN \u0432 \u0432\u0438\u0434\u0435\u043e\u0443\u0440\u043e\u043a\u0430\u0445 \u0414\u0435\u043d\u044c 11, 12 \u0438 13 \u0438 \u0441\u0435\u0433\u043e\u0434\u043d\u044f \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u043c \u0438\u0445 \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u0435 \u0432 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u0438 \u0441 \u0442\u0435\u043c\u0430\u0442\u0438\u043a\u043e\u0439 ICND2. \u042f \u0437\u0430\u043f\u0438\u0441\u0430\u043b \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0435 \u0432\u0438\u0434\u0435\u043e, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043e\u0437\u043d\u0430\u043c\u0435\u043d\u043e\u0432\u0430\u043b\u043e \u043e\u043a\u043e\u043d\u0447\u0430\u043d\u0438\u0435 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043a\u0438 \u043a \u0441\u0434\u0430\u0447\u0435 \u044d\u043a\u0437\u0430\u043c\u0435\u043d\u0430 ICND1, \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u043d\u0430\u0437\u0430\u0434 \u0438 \u0432\u0441\u0435 \u044d\u0442\u043e \u0432\u0440\u0435\u043c\u044f \u0434\u043e \u0441\u0435\u0433\u043e\u0434\u043d\u044f\u0448\u043d\u0435\u0433\u043e \u0434\u043d\u044f \u0431\u044b\u043b \u043e\u0447\u0435\u043d\u044c \u0437\u0430\u043d\u044f\u0442. \u0414\u0443\u043c\u0430\u044e, \u043c\u043d\u043e\u0433\u0438\u0435 \u0438\u0437 \u0432\u0430\u0441 \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u0441\u0434\u0430\u043b\u0438 \u044d\u0442\u043e\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28433,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-37888","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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