{"id":97104,"date":"2020-10-16T08:42:19","date_gmt":"2020-10-16T06:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/packet-tracer-laboratornaya-rabota-nastrojka-plavayushhih-staticheskih-marshrutov"},"modified":"2020-10-16T08:42:19","modified_gmt":"2020-10-16T06:42:19","slug":"packet-tracer-laboratornaya-rabota-nastrojka-plavayushhih-staticheskih-marshrutov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/packet-tracer-laboratornaya-rabota-nastrojka-plavayushhih-staticheskih-marshrutov","title":{"rendered":"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h2>Topologia di rete<\/h2>\n<p>\n<img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/d60e4594ba0528414e58fff3ccb1e8cd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h2>Attivit\u00e0<\/h2>\n<p><\/p>\n<ol>\n<li>Creazione di una rotta statica principale predefinita<\/li>\n<li>Distribuzione della rotta statica flottante<\/li>\n<li>Verifica del passaggio a una rotta statica flottante in caso di guasto della rotta principale<\/li>\n<\/ol>\n<p><\/p>\n<h2>Panoramica<\/h2>\n<p>\nIniziamo con alcune parole su cosa sia una rotta statica, e ancor di pi\u00f9, una rotta flottante. A differenza della routing dinamica, la routing statica richiede la creazione manuale di una rotta verso una rete specifica. Una rotta statica flottante serve a fornire un percorso di backup verso la rete di destinazione in caso di guasto della rotta principale.<\/p>\n<p>Nel nostro esempio, il 'Router di confine' ha attualmente solo rotte direttamente connesse alle reti ISP1, ISP2, LAN_1 e LAN_2.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/a696205f8c9e062d9ada51fda3de9e21.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Creazione di una rotta statica principale predefinita<\/h2>\n<p>\nPrima di parlare della rotta di riserva, \u00e8 necessario costruire prima la rotta principale. Supponiamo che la rotta principale dal router di confine passi attraverso ISP1 verso la rete Internet, mentre la rotta attraverso ISP2 sar\u00e0 quella di riserva. Per questo, sul router di confine, in modalit\u00e0 di configurazione globale, impostiamo una rotta statica predefinita:<\/p>\n<pre><code class=\"xml\">Edge_Router&gt;it\nEdge_Router#conf t\nEdge_Router(config)#ip route 0.0.0.0 0.0.0.0 s0\/0\/0 \n<\/code><\/pre>\n<p>\ndove:<\/p>\n<ul>\n<li>i primi 32 bit di zeri \u2014 l'indirizzo della rete di destinazione; <\/li>\n<li>i secondi 32 bit di zeri \u2014 la maschera di rete; <\/li>\n<li>s0\/0\/0 \u2014 l'interfaccia di uscita del router di confine collegata alla rete ISP1. <\/li>\n<\/ul>\n<p>\nQuesta voce indica che, se i pacchetti in arrivo al router di confine dalle reti LAN_1 o LAN_2 contengono un indirizzo di rete di destinazione non presente nella tabella di routing, verranno inoltrati attraverso l'interfaccia s0\/0\/0. <\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/bc28d8bfebe2fc75d81ab0817588ba15.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVerifichiamo la tabella di routing del router di confine e inviamo una richiesta di eco da <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"server web\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1158\">server web<\/a> PC-A o PC-B:<\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/9cad9e3ba223c822c5e8d5f87e55e5b9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/f38b705b02f9c820bc1eb6db23276e19.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nOsserviamo che nella tabella di routing \u00e8 stata aggiunta una voce di percorso statico predefinito (come indicato dalla voce S*). Effettuiamo un tracciamento del percorso da PC-A o PC-B al server web-<a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3663\">server<\/a>:<\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/449b5e7228c87f188d421378a5e2465c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nIl primo salto avviene da PC-B all'indirizzo IP locale del router di confine 192.168.11.1. Il secondo salto \u2014 dal router di confine a 10.10.10.1 (ISP1). Ricordiamo, in seguito confronteremo i salti.<\/p>\n<h2>Distribuzione della rotta statica flottante<\/h2>\n<p>\nQuindi, abbiamo creato il percorso statico principale. Successivamente, creiamo il percorso statico galleggiante attraverso la rete ISP2. La procedura per creare un percorso statico galleggiante non differisce da quella di un percorso statico normale, tranne per il fatto che nel primo viene specificata un'ulteriore distanza amministrativa. La distanza amministrativa indica il grado di affidabilit\u00e0 del percorso. Infatti, la distanza amministrativa di un percorso statico \u00e8 pari a uno, il che significa assoluto predominio rispetto ai protocolli di instradamento dinamici, i quali hanno distanze amministrative notevolmente pi\u00f9 elevate, ad eccezione dei percorsi locali, che hanno una distanza pari a zero. Di conseguenza, quando si crea un percorso statico galleggiante, \u00e8 necessario indicare una distanza amministrativa maggiore di uno, ad esempio, 5. Cos\u00ec, il percorso galleggiante non avr\u00e0 priorit\u00e0 rispetto al percorso statico principale, ma nel momento in cui questo diventa non disponibile, il percorso predefinito sar\u00e0 considerato principale.<\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/9929fbcf1bb5d27609d41cb1355142d9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nLa sintassi per la configurazione di un percorso statico galleggiante \u00e8 la seguente:<\/p>\n<pre><code class=\"xml\">Edge_Router(config)#ip route 0.0.0.0 0.0.0.0 s0\/0\/1 5<\/code><\/pre>\n<p>\ndove: <\/p>\n<ul>\n<li>5 \u2014 questo \u00e8 il valore della distanza amministrativa;<\/li>\n<li>s0\/0\/1 \u2014 interfaccia di uscita del router borderline collegato alla rete ISP2.<\/li>\n<\/ul>\n<p>\n\u00c8 immediatamente evidente che <u>finch\u00e9 la rotta principale \u00e8 attiva, la rotta statica flottante non verr\u00e0 visualizzata nella tabella di routing.<\/u>. Per maggiore chiarezza, mostriamo il contenuto della tabella di routing mentre la rotta principale \u00e8 in buone condizioni:<\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/e2d4a77200450fcee35a9046c2c6998f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nSi pu\u00f2 vedere che nella tabella di routing \u00e8 ancora visualizzata la rotta statica predefinita con l'interfaccia di uscita Serial0\/0\/0 e che non ci sono altre rotte statiche nella tabella di routing.<\/p>\n<h2>Verifica del passaggio a una rotta statica flottante in caso di guasto della rotta principale<\/h2>\n<p>\n<b>E ora, la parte pi\u00f9 interessante:<\/b> simuleremo il fallimento della rotta principale. Questo pu\u00f2 essere fatto disattivando l'interfaccia a livello software, oppure semplicemente scollegando la connessione tra il router e ISP1. Disattiviamo l'interfaccia Serial0\/0\/0 della rotta principale:<\/p>\n<pre><code class=\"xml\">Edge_Router&gt;en\nEdge_Router#conf t\nEdge_Router(config)#int s0\/0\/0\nEdge_Router(config-if)#shutdown\n<\/code><\/pre>\n<p>\n\u2026 e corriamo subito a controllare la tabella di routing:<\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/961f636462173a5551194c78378782e1.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNell'immagine sopra si pu\u00f2 vedere che dopo il guasto della rotta statica principale, l'interfaccia di uscita Serial0\/0\/0 \u00e8 cambiata in Serial0\/0\/1. Durante il primo tracciamento effettuato in precedenza, il passaggio dal router di confine avveniva all'indirizzo IP 10.10.10.1. Confrontiamo i passaggi eseguendo un nuovo tracciamento utilizzando la rotta di riserva:<\/p>\n<p><img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/5b204b0a79c5ea416622b3ff5c954bee.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nOra il passaggio dal router di confine al server web avviene tramite l'indirizzo IP 10.10.10.5 (ISP2).<\/p>\n<p>Certo, le rotte statiche possono essere visualizzate mostrando la configurazione attuale del router:<\/p>\n<pre><code class=\"xml\">Edge_Router&gt;en\nEdge_Router#show run\n<\/code><\/pre>\n<p>\n<img decoding=\"async\" alt=\"Packet Tracer. Laboratorio: Configurazione di route statiche flottanti\" src=\"\/wp-content\/uploads\/2020\/10\/a4bca44fd296c69f69b6e75c421c0ab0.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/523534\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0422\u043e\u043f\u043e\u043b\u043e\u0433\u0438\u044f \u0441\u0435\u0442\u0438 \u0417\u0430\u0434\u0430\u0447\u0438 \u0421\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0433\u043e \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0420\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u0435 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0433\u043e 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\u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0438\u0439 \u043c\u0430\u0440\u0448\u0440\u0443\u0442. \u0412 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439, \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0446\u0438\u044f \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0441\u0430\u043c\u043e\u0441\u0442\u043e\u044f\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0430 \u0432 \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u0443\u044e \u0441\u0435\u0442\u044c. \u041f\u043b\u0430\u0432\u0430\u044e\u0449\u0438\u0439 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Laboratorio: Configurazione delle rotte statiche flottanti | ProHoster","description":"Topologia di rete Compiti Creazione di una rotta statica principale predefinita Distribuzione di una rotta statica flottante Verifica del passaggio a una rotta statica flottante in caso di guasto della rotta principale Informazioni generali Quindi, per iniziare, qualche parola su cosa sia una rotta statica e, per di pi\u00f9, una rotta flottante. A differenza della dinamica, la configurazione statica richiede la costruzione del percorso verso una rete specifica. Flottante","canonical_url":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/packet-tracer-laboratornaya-rabota-nastrojka-plavayushhih-staticheskih-marshrutov","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47Packet Tracer. \u041b\u0430\u0431\u043e\u0440\u0430\u0442\u043e\u0440\u043d\u0430\u044f \u0440\u0430\u0431\u043e\u0442\u0430: \u041d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0438\u0445 \u0441\u0442\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 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