{"id":562,"date":"2021-01-11T08:06:26","date_gmt":"2021-01-11T14:06:26","guid":{"rendered":"http:\/\/jmcristobal.com.mx\/?p=562"},"modified":"2022-02-07T22:30:32","modified_gmt":"2022-02-08T06:30:32","slug":"cdp","status":"publish","type":"post","link":"http:\/\/ec2-52-7-70-250.compute-1.amazonaws.com\/es\/2021\/01\/11\/cdp\/","title":{"rendered":"CDP &#8211; Cisco Discovery Protocol"},"content":{"rendered":"<p lang=\"es-MX\">Es un protocolo propietario de Cisco utilizado para recopilar informaci\u00f3n de dispositivos en la red que est\u00e1n conectados directamente, tal como hardware, software, nombre del dispositivo y m\u00e1s.<\/p>\n<p lang=\"es-MX\">CDP al ser un protocolo proprietario de Cisco no es compatible con otros marcas, opera en la capa 2 (enlace de datos) y est\u00e1 habilitado por default.<\/p>\n<p lang=\"es-MX\">Actualmente CDP se encuetra en la versi\u00f3n 2:<\/p>\n<ul type=\"disc\">\n<li lang=\"es-MX\">V1:- Esta versi\u00f3n solo colectaba informaci\u00f3n del dispositivo vecino.<\/li>\n<li lang=\"es-MX\">V2:- Con esta versi\u00f3n se incluyeron mejoras al protocolo, actualmente CDP es capaz de idientificar un mismatch con los ID de la vlan nativa o un mismatch en el duplex de los dispositivos que tiene conectados directamente.<\/li>\n<\/ul>\n<p lang=\"es-MX\">Comando para ver la versi\u00f3n, el intervalo de los anuncios y  holdtime de CDP:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">Switch#show cdp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\nGlobal CDP information:\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Sending CDP packets every 60 seconds\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Sending a holdtime value of 180 seconds\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Sending CDPv2 advertisements is\u00a0 enabled\nSwitch#<\/pre>\n<p lang=\"es-MX\">Como se puede observar en la salida anterior los anuncios CDP se env\u00edan cada 60 segundos por default y estos se env\u00edan por cada interfaz activa. Si despues de 180 segundos el switch no recibe anuncios CDP por alguna interfaz, este procede a eliminar el neighbor.<\/p>\n<p lang=\"es-MX\">Comando para mostrar la informaci\u00f3n sobre los anuncios  CDP que ha recibido un switch:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">Switch# show cdp neighbors [ type member\/module\/number] [ detail]\n\nSwitch# show cdp neighbors gig1\/0\/24<\/pre>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">Switch#\nSwitch# show cdp neighbors \nCapability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone\n\nDevice ID\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Local Intrfce\u00a0\u00a0\u00a0\u00a0 Holdtme\u00a0\u00a0\u00a0 Capability\u00a0 Platform\u00a0 Port ID\nSW5   \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fas 1\/4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 166\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/13\nSwitch03\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Gig 2\/1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 139\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/85\nSW6\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0       Fas 5\/10\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 142\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/18\nFA3A55D\u00a0         Fas 0\/9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 132\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 H P\u00a0\u00a0\u00a0\u00a0\u00a0 IP Phone 7 Port 1\nSW7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fas 0\/5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 162\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/11\nSWVLAN\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fas 0\/3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 166\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/19\nSW1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fas 0\/8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 155\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/16\nSW2              Gig 1\/40\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 140\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S I\u00a0\u00a0\u00a0\u00a0\u00a0 WS-C3750G-Gig 1\/0\/12\n\nSwitch#<\/pre>\n<p lang=\"es-MX\">Para ver toda la informaci\u00f3n CDP recibida en un anuncio, agregue la palabra clave detail.<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">Switch# show cdp neighbors detail<\/pre>\n<p lang=\"es-MX\">El comando anterior mostrar\u00e1 la informaci\u00f3n a detalle de todos los dispositivos conocidos a trav\u00e9s de CDP. Podemos filtrar la informaci\u00f3n a trav\u00e9s de una sola interfaz:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">Switch# show cdp neighbors Fas 1\/1 det\n-------------------------\nDevice ID: Sw01\nEntry address(es): \n\u00a0 IP address: 10.2.6.4\nPlatform: cisco WS-C3750G-24TS-1U,\u00a0 Capabilities: Switch IGMP \nInterface: FastEthernet1\/1,\u00a0 Port ID (outgoing port): GigabitEthernet2\/0\/24\nHoldtime : 169 sec\n\nVersion :\nCisco IOS Software, C3750 Software (C3750-ADVIPSERVICESK9-M), Version 12.2(44)SE6, RELEASE SOFTWARE (fc1)\nCopyright (c) 1986-2009 by Cisco Systems, Inc.\nCompiled Mon 09-Mar-09 17:56 by gereddy\n\nadvertisement version: 2\nProtocol Hello:\u00a0 OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF010221FF000000000000FCFBFB780E00FF0000\nVTP Management Domain: ''\nNative VLAN: 1\nDuplex: full\n\nSwitch#<\/pre>\n<p>Para deshabilitar CDP de manera global se realiza con el siguiente comando:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">!\nSwitch(config)# no cdp run\n!<\/pre>\n<p lang=\"es-MX\">A veces, por razones de seguridad, es posible que desee deshabilitar los anuncios de CDP en una interfaz individual y\/o que no esten conectadas a equipos cisco:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">!\nSwitch(config)# int fa0\/12\nSwitch(config-if)# [no] cdp enable\n!<\/pre>\n<p>En resumen, les dejo un listado de comandos para configurar CDP:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">(config)# cdp run\u00a0\u00a0 \u00a0                 Enables CDP globally on device.\n(config)# no cdp run\u00a0\u00a0 \u00a0              Disables CDP globally on device.\n(config-if)# cdp enable\u00a0\u00a0 \u00a0           Enables CDP on an interface device if CDP is enabled globally.\n(config-if)# no cdp enable\u00a0\u00a0 \u00a0        Disables CDP on an interface device.\n(config)# cdp timer &lt;seconds&gt;\u00a0\u00a0 \u00a0\n(config)# cdp holdtime &lt;seconds&gt;<\/pre>\n<p>Comandos de verificaci\u00f3n:<\/p>\n<pre class=\"height-set:true height:700 width-set:true width:700 top-margin:25 left-set:true left-margin:25 toolbar:2 lang:sh decode:true\">!\nSwitch# clear cdp counters\nSwitch# clear cdp table\nSwitch# show cdp\nSwitch# show cdp entry device-name [protocol | version]\nSwitch# show cdp interface [type number]\nSwitch# show cdp neighbors [type number] [detail]\nSwitch# show cdp traffic\n!<\/pre>\n<p>Mas informaci\u00f3n<\/p>\n<p><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/switches\/lan\/catalyst3750x_3560x\/software\/release\/15-2_4_e\/configurationguide\/b_1524e_consolidated_3750x_3560x_cg\/b_1524e_consolidated_3750x_3560x_cg_chapter_0100101.html\">https:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/switches\/lan\/catalyst3750x_3560x\/software\/release\/15-2_4_e\/configurationguide\/b_1524e_consolidated_3750x_3560x_cg\/b_1524e_consolidated_3750x_3560x_cg_chapter_0100101.html<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>CDP is a Cisco proprietary protocol used to collect information from devices on the network that is directly connected, such as hardware, <\/p>","protected":false},"author":2,"featured_media":1392,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[233],"tags":[497,280,496,340,462,427],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - 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