{"id":2766,"date":"2019-01-10T13:48:19","date_gmt":"2019-01-10T12:48:19","guid":{"rendered":"https:\/\/www.websupport.sk\/podpora\/?post_type=ht_kb&p=2766"},"modified":"2020-11-26T18:20:00","modified_gmt":"2020-11-26T17:20:00","slug":"kolko-trva-zmena-dns-zaznamu","status":"publish","type":"ht_kb","link":"https:\/\/www.websupport.sk\/podpora\/kb\/kolko-trva-zmena-dns-zaznamu\/","title":{"rendered":"Ko\u013eko trv\u00e1 zmena DNS z\u00e1znamu?"},"content":{"rendered":"\n

Pri zmene DNS z\u00e1znamov m\u00f4\u017ee trva\u0165 a\u017e 24 hod\u00edn, k\u00fdm v\u0161etky servery na internete dostan\u00fa nov\u00e9 inform\u00e1cie. Maxim\u00e1lnu dobu ur\u010duje nastavenie parametra TTL.<\/p>\n\n\n\n

\n\n\n\n

\u010co je to TTL?<\/strong><\/h3>\n\n\n\n

Skratka TTL znamen\u00e1 „Time To Live“. Je ud\u00e1van\u00e1 v sekund\u00e1ch a ozna\u010duje dobu, na ako dlho m\u00f4\u017ee by\u0165 DNS z\u00e1znam uchovan\u00fd v cache pam\u00e4ti DNS servera u poskytovate\u013ea internetu. \u010casto je ud\u00e1van\u00e1 hodnota 86400 sek\u00fand, \u010do je 24 hod\u00edn. Potom \u010do doba TTL uplynie, s\u00fa DNS nastavenia nanovo na\u010d\u00edtavan\u00e9.<\/p>\n\n\n\n

Pre\u010do m\u00f4\u017ee trva\u0165 zmena DNS a\u017e 24 hodin\u00e1ch?<\/strong><\/h3>\n\n\n\n

Po\u010d\u00edta\u010de pristupuj\u00fa k cie\u013eov\u00e9mu serveru s obsahom dom\u00e9ny r\u00f4znymi cestami. Na IP adresu cie\u013eov\u00e9ho servera sa dopytuj\u00fa r\u00f4znych DNS serverov. Servery ktor\u00e9 s\u00fa „po ceste“ si v\u0161ak kv\u00f4li zn\u00ed\u017eeniu z\u00e1\u0165a\u017ee ukladaj\u00fa hodnoty DNS nastaven\u00ed do svojeje cache pam\u00e4te. Dobu ulo\u017eenia ur\u010duje pr\u00e1ve hodnota TTL. Z toho d\u00f4vodu, m\u00f4\u017ee DNS server po\u010d\u00edta\u010du vraca\u0165 e\u0161te star\u00fa hodnotu nastavenia DNS a to a\u017e do doby ne\u017e vypr\u0161\u00ed TTL. Potom DNS server svoj z\u00e1znam aktualizuje.<\/p>\n\n\n\n

Ako sa d\u00e1 zisti\u0165, \u010di sa u\u017e zmena prejavila?<\/strong><\/h3>\n\n\n\n

Ak pozn\u00e1te IP adresu nov\u00e9ho cie\u013eov\u00e9ho servera, sta\u010d\u00ed zada\u0165 pr\u00edkaz ping v pr\u00edkazovom riadku (napr. „ping 37.9.168.19“). Ak IP adresu nepozn\u00e1te, je lep\u0161ie pou\u017ei\u0165 pr\u00edkaz tracert (napr. „tracert websupport.sk“). Tento pr\u00edkaz V\u00e1m zobrazia cez ak\u00e9 uzly sa V\u00e1\u0161 po\u010d\u00edta\u010d k cie\u013eov\u00e9mu serveru prip\u00e1ja.<\/p>\n\n\n\n

Zmena sa ani po 24 hodin\u00e1ch neprejavila, je to mo\u017en\u00e9?<\/strong><\/h3>\n\n\n\n

\u00c1no, vo v\u00fdnimo\u010dn\u00fdch pr\u00edpadoch m\u00f4\u017ee trva\u0165 zmena DNS aj dlh\u0161ie ako 24 hod\u00edn. Napr\u00edklad ak je na nejakom DNS serveri „po ceste“ nastaven\u00e9 TTL na viac ako 86400 sek\u00fand. \u010eal\u0161ia mo\u017enos\u0165 je, \u017ee p\u00f4vodn\u00e9 nastavenia DNS s\u00fa ulo\u017een\u00e9 v lok\u00e1lnej DNS cache po\u010d\u00edta\u010da. T\u00fato cache mo\u017eno vypr\u00e1zdni\u0165 pomocou pr\u00edkazov\u00e9ho riadku a pr\u00edkazu Flushdns.<\/strong><\/p>\n\n\n\n

Vo Windows<\/strong> postupujte nasledovne:<\/p>\n\n\n\n

1. Kliknite na tla\u010didlo „\u0160tart“ a spustite „cmd“. V nov\u0161\u00edch verzi\u00e1ch Windows, sta\u010d\u00ed „cmd“ nap\u00edsa\u0165 do riadku vyh\u013ead\u00e1vania a stla\u010di\u0165 „Enter“, u star\u0161\u00edch verzi\u00ed je nutn\u00e9 klikn\u00fa\u0165 na „Spusti\u0165“ a a\u017e n\u00e1sledne „cmd“ nap\u00edsa\u0165.<\/p>\n\n\n\n

2. Do zobrazen\u00e9ho okna, m\u00f4\u017eete nap\u00edsa\u0165 pr\u00edkaz „ipconfig \/flushdns“ a stla\u010dte „Enter“. Ak sa zobraz\u00ed hl\u00e1\u0161ka, \u017ee pam\u00e4\u0165 bola premazan\u00e1, prebehlo v\u0161etko v poriadku.<\/p>\n\n\n\n


<\/p>\n","protected":false},"excerpt":{"rendered":"

Pri zmene DNS z\u00e1znamov m\u00f4\u017ee trva\u0165 a\u017e 24 hod\u00edn, k\u00fdm v\u0161etky servery na internete dostan\u00fa nov\u00e9 inform\u00e1cie. Maxim\u00e1lnu dobu ur\u010duje nastavenie parametra TTL. \u010co je to TTL? Skratka TTL znamen\u00e1 „Time To Live“. Je ud\u00e1van\u00e1 v sekund\u00e1ch a ozna\u010duje dobu, na ako dlho m\u00f4\u017ee by\u0165 DNS z\u00e1znam uchovan\u00fd v cache pam\u00e4ti DNS…<\/p>\n","protected":false},"author":30,"template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[37,30],"ht-kb-tag":[],"class_list":["post-2766","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-dns-zaznamy","ht_kb_category-domeny"],"yoast_head":"\nKo\u013eko trv\u00e1 zmena DNS z\u00e1znamu? - Websupport centrum podpory<\/title>\n<meta name=\"description\" content=\"Pri zmene DNS z\u00e1znamov m\u00f4\u017ee trva\u0165 a\u017e 24 hod\u00edn, k\u00fdm v\u0161etky servery na internete dostan\u00fa nov\u00e9 inform\u00e1cie. 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