{"id":1603,"date":"2022-02-23T09:00:00","date_gmt":"2022-02-23T17:00:00","guid":{"rendered":"https:\/\/jmcristobal.com\/?p=1603"},"modified":"2022-02-20T17:23:36","modified_gmt":"2022-02-21T01:23:36","slug":"configuring-ntp-on-cisco-ios","status":"publish","type":"post","link":"https:\/\/jmcristobal.com\/es\/2022\/02\/23\/configuring-ntp-on-cisco-ios\/","title":{"rendered":"Configuring NTP on Cisco IOS"},"content":{"rendered":"<p>Protocolo utilizado para sincronizaci\u00f3n centralizada de la fecha y hora de los dispositivos. Trabaja sobre el puerto UDP 123.&nbsp;<\/p>\n\n\n\n<p>Modos de operaci\u00f3n NTP:<\/p>\n\n\n\n<ul><li><strong>Server:<\/strong> el dispositivo se sincroniza con una fuente de un estrato inferior y proporciona la sincronizaci\u00f3n horaria con servidores o clientes de un estrato superior.<br><\/li><li><strong>Client:<\/strong> el dispositivo sincroniza su reloj con un servidor NTP.<br><\/li><li><strong>Peer:<\/strong> el dispositivo intercambia informaci\u00f3n horaria con otro dispositivo peer.<br><\/li><li><strong>Broadcast\/multicast: <\/strong>el dispositivo funciona como un servidor NTP, pero env\u00eda la informaci\u00f3n horaria a cualquier dispositivo que lo escuche. Debido a que el \"push\" es en una sola direcci\u00f3n, la precisi\u00f3n de la hora puede sufrir un poco.<\/li><\/ul>\n\n\n\n<p><strong>Configuring NTP servers<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code lang=\"adoc\" class=\"language-adoc\">Switch(config)# ntp server ip-address [ prefer ] [ version { 3 | 4 } ]<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>Ajuste la zona horaria de acuerdo a su ubicaci\u00f3n y active el horario de verano:<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code lang=\"adoc\" class=\"language-adoc\">Switch(config)# clock timezone EST-5.<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>Ejemplo:<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code lang=\"adoc\" class=\"language-adoc\">Switch(config)# ntp server 10.1.1.1.1 prefer\nSwitch(config)# ntp server 10.99.99.45<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>Comandos debug<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code lang=\"adoc\" class=\"language-adoc\">Switch# show clock\nSwitch# show ntp status\nSwitch# show ntp associations<\/code><\/pre>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Protocolo utilizado para sincronizaci\u00f3n centralizada de la fecha y hora de los dispositivos. Trabaja sobre el puerto UDP 123.&nbsp; <\/p>","protected":false},"author":2,"featured_media":1392,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[233],"tags":[512,280,549,340,548,407,427,550,440],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Configuring NTP on Cisco IOS - JMCristobal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jmcristobal.com\/es\/2022\/02\/23\/configuring-ntp-on-cisco-ios\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Configuring NTP on Cisco IOS - JMCristobal\" \/>\n<meta property=\"og:description\" content=\"Network Time Protocol (NTP) is used for centralized synchronization of the date and time of devices. 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