{"id":112,"date":"2021-03-19T07:53:25","date_gmt":"2021-03-19T06:53:25","guid":{"rendered":"http:\/\/www.netexpertise.eu\/es\/?p=112"},"modified":"2021-05-01T08:34:03","modified_gmt":"2021-05-01T07:34:03","slug":"rele-dhcp-sobre-un-switch-cisco-catalyst-2960","status":"publish","type":"post","link":"http:\/\/www.netexpertise.eu\/es\/redes\/cisco\/rele-dhcp-sobre-un-switch-cisco-catalyst-2960.html","title":{"rendered":"Rel\u00e9 DHCP sobre un Switch Cisco Catalyst 2960"},"content":{"rendered":"\n<p>Tener un rel\u00e9 DHCP en un switch de nivel 2 puede parecer absurdo. El servidor DHCP del enrutador que perteneci\u00f3 al PSI se hab\u00eda bloqueado en&nbsp;un sitio remoto, no pod\u00eda<strong>&nbsp;<\/strong>hacer nada m\u00e1s que conectarme al switch. Era mi \u00fanica opci\u00f3n para evitar un cambio masivo para IP est\u00e1ticas.<\/p>\n\n\n\n<p id=\"tw-target-text\">Algunos dir\u00edan que el hardware de nivel 2 no puede manejar DHCP pero miren, es parte de la lista de <a href=\"http:\/\/www.cisco.com\/en\/US\/prod\/collateral\/switches\/ps5718\/ps6406\/prod_presentation_c97-494780.pdf\">caracter\u00edsticas<\/a> del <a href=\"\/es\/category\/redes\/cisco\">Cisco<\/a> Catalyst 2960&#8230; Incluso funciona en un modelo equipado con una imagen LAN b\u00e1sica.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img src=\"\/images\/Cisco_catalyst_dhcp_relay.png\" alt=\"Rel\u00e9 DHCP en Cisco Catalyst\"\/><\/figure>\n\n\n\n<p id=\"tw-target-text\">Primero cre\u00e9 un nuevo alcance en el servidor DHCP de Windows de mi sitio principal cuya direcci\u00f3n IP es 192.168.15.240.<br><br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img src=\"http:\/\/www.netexpertise.eu\/images\/Windows_DHCP_Relay_Scope.png\" alt=\"Rangos de DHCP en Windows\"\/><\/figure><\/div>\n\n\n\n<p id=\"tw-target-text\"><br>Y as\u00ed es como configur\u00e9 mi Cisco 2960: es un sitio peque\u00f1o, uno vlan (VLAN 50), todos los puertos est\u00e1n en el mismo vlan <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">interface Vlan50\n ip address 192.168.50.11 255.255.255.0\n no ip route-cache\n!\nip default-gateway 192.168.50.254\n\nservice dhcp\n\nip dhcp pool Mi_Dhcp_Pool\n   relay source 192.168.50.0 255.255.255.0\n   relay destination 192.168.15.240\n!<\/code><\/pre>\n\n\n\n<p id=\"tw-target-text\"><br>Aseg\u00farese de tener conectividad con el servidor DHCP<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">conmutador# ping 192.168.15.240\n\nType escape sequence to abort.\nSending 5, 100-byte ICMP Echos to 192.168.15.240, timeout is 2 seconds:\n!!!!!\nSuccess rate is 100 percent (5\/5), round-trip min\/avg\/max = 33\/42\/59 ms<\/code><\/pre>\n\n\n\n<p><br><\/p>\n\n\n\n<p id=\"tw-target-text\">La interfaz del vlan debe configurarse con una direcci\u00f3n IP y una m\u00e1scara de red adecuadas, y debe activarse con el comando <em>no shutdown<\/em>.<br><\/p>\n\n\n\n<p id=\"tw-target-text\">Como el switch tiene solo una interfaz, solo puede proporcionar direcciones IP en un solo rango. No creo que una solicitud dhcp recibida en un puerto asignado a un vlan diferente obtenga una respuesta, aunque no lo he probado<\/p>\n\n\n\n<p id=\"tw-target-text\"><br>Desactive el rel\u00e9 DHCP si ya no lo necesita<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json\">no service dhcp<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Tener un rel\u00e9 DHCP en un switch de nivel 2 puede parecer absurdo. El servidor DHCP del enrutador que perteneci\u00f3 al PSI se hab\u00eda bloqueado en&nbsp;un sitio remoto, no pod\u00eda&nbsp;hacer nada m\u00e1s que conectarme al switch. Era mi \u00fanica opci\u00f3n para evitar un cambio masivo para IP est\u00e1ticas. Algunos dir\u00edan que el hardware de nivel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[29],"tags":[30,31,32,33,34,37,35,36],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Netexpertise - Rel\u00e9 DHCP sobre un Switch Cisco Catalyst 2960<\/title>\n<meta name=\"description\" content=\"Configure un switch Cisco Catalyst 2960 de nivel 2 como un rel\u00e9 DHCP de un servidor Windows, \u00a1es posible!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.netexpertise.eu\/es\/redes\/cisco\/rele-dhcp-sobre-un-switch-cisco-catalyst-2960.html\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Netexpertise - 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