{"id":1656,"date":"2022-03-09T17:00:00","date_gmt":"2022-03-10T01:00:00","guid":{"rendered":"https:\/\/jmcristobal.com\/?p=1656"},"modified":"2022-03-09T17:39:10","modified_gmt":"2022-03-10T01:39:10","slug":"switchport-analyzer-span-and-rspan","status":"publish","type":"post","link":"http:\/\/ec2-52-7-70-250.compute-1.amazonaws.com\/es\/2022\/03\/09\/switchport-analyzer-span-and-rspan\/","title":{"rendered":"Switched Port Analyzer (SPAN and RSPAN)"},"content":{"rendered":"
SPAN (Switched Port Analyzer) es un feature que permite copiar el tr\u00e1fico desde un puerto origen o vlan del switch a un puerto destino.<\/p>\n\n\n\n
En este art\u00edculo hablaremos de:<\/p>\n\n\n\n
SPAN Local: tanto la fuente SPAN como el destino se encuentran en el switch local. La fuente es uno o m\u00e1s puertos de switch. <\/li>
SPAN Remoto: la fuente y el destino de SPAN se encuentran en diferentes switches. El tr\u00e1fico duplicado se copia sobre una VLAN de prop\u00f3sito especial en los switches a trav\u00e9s de troncales desde el origen hasta el destino.<\/li><\/ul>\n\n\n\n
De acuerdo a la imagen de arriba, configuremos una sesi\u00f3n SPAN para hacer una copia de todo el tr\u00e1fico del puerto g0\/1 hacia el puerto g0\/15 donde se encuentra el analyzer:<\/p>\n\n\n\n
both significa que se va a enviar el trafico entrante y saliente de la interfaz origen (both es por default), se puede utilizar rx o tx para solo enviar el tr\u00e1fico en un sentido.<\/p>\n\n\n\n
Configuraci\u00f3n RSPAN.<\/strong><\/h5>\n\n\n\n
Definir una vlan para transportar el tr\u00e1fico SPAN entre los switches:<\/p>\n\n\n\n
En el switch de destino, debe volver a identificar el origen y el destino de RSPAN utilizando los siguientes comandos de configuraci\u00f3n global:<\/p>\n\n\n\n
Aqu\u00ed los roles est\u00e1n invertidos. Los paquetes RSPAN se extraen de la VLAN de RSPAN y se colocan en el destino, que es una interfaz de conmutaci\u00f3n f\u00edsica o una VLAN de Capa 2.<\/p>\n\n\n\n
De acuerdo al diagrama la fuente SPAN es el puerto g0\/1 del switch1 y el objetivo es hacerlo llegar al analyzer que se encuentra en el puerto g0\/9 del switch 3 a trav\u00e9s de la vlan 33.<\/p>\n\n\n\n
!Configuraci\u00f3n del Switch1<\/b><\/span> !Crear vlan RSPAN, definir sesiones RSPAN y propagar la vlan 33 por el puerto troncal g0\/15<\/strong><\/span> Switch1(config)# vlan 33 Switch1(config-vlan)# remote-span Switch1(config)# monitor session 1 source interface g0\/1 both Switch1(config)# monitor session 1 destination remote remote vlan 33<\/kbd>
!Configuraci\u00f3n del Switch2<\/strong> !Crear la vlan 33 y permitirla en los enlaces troncales del hacia el Switch 1 y 2<\/strong><\/span> Switch2(config)# vlan 33 Switch2(config-vlan)# remote-span<\/kbd>
!Configuraci\u00f3n del Switch3 Crear la vlan 33, permitirla en los enlaces troncales hacia el Switch 2 y configurar las sesi\u00f3n RSPAN hacia el puerto g0\/9<\/span><\/strong> Switch3(config-vlan)# vlan 33 Switch3(config)# remote-span Switch3(config)# monitor session 1 source remote vlan 33 Switch3(config)# monitor session 1 interface g0\/9<\/kbd><\/p>\n\n\n\n
Comandos de verificaci\u00f3n<\/strong><\/h5>\n\n\n\n
Switch# show monitor Switch# show run | i monitor<\/kbd><\/p>\n\n\n\n
<\/p>","protected":false},"excerpt":{"rendered":"
SPAN (Switched Port Analyzer) es un feature que permite copiar el tr\u00e1fico desde un puerto origen o vlan del switch a un puerto destino. <\/p>","protected":false},"author":2,"featured_media":1659,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[233],"tags":[570,569,568,427,428],"yoast_head":"\n
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