En mi trabajo, por más de una ocasión, me han solicitado que deseaban saber cuanto tiempo llevaba una interfaz sin cursar tráfico. O cuando toca hacer un peinado de armario, o re-estructuración de cableado.
Primero debemos saber cuanto tiempo lleva encendido el equipo en cuestión, para saber el tiempo máximo que nos va a mostrar el filtro que vamos a hacer.
SwitchA#show version | i uptime
SwitchA uptime is 2 years, 25 weeks, 16 hours, 39 minutes
Por consiguiente, el tiempo máximo que una interfaz ha estado sin cursar tráfico va a ser 2 años, 25 semanas, 16 horas y 39 minutos.
Una vez obtenido este resultado, hacemos el filtro para saber el tiempo de inactividad de las interfaces.
SwitchA#show int | i Ethernet0/*|proto.*notconnect|proto.*administratively down|Last in
GigabitEthernet0/1 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/2 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/3 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/4 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/5 is down, line protocol is down (notconnect)
Last input never, output 1y29w, output hang never
GigabitEthernet0/6 is down, line protocol is down (notconnect)
Last input never, output never, output hang never
GigabitEthernet0/7 is down, line protocol is down (notconnect)
Last input never, output 1y29w, output hang never
GigabitEthernet0/8 is down, line protocol is down (notconnect)
Last input never, output 1y29w, output hang never
GigabitEthernet0/9 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/10 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/11 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/12 is down, line protocol is down (notconnect)
Last input never, output 1y29w, output hang never
GigabitEthernet0/13 is down, line protocol is down (notconnect)
Last input 17w0d, output 17w0d, output hang never
GigabitEthernet0/14 is down, line protocol is down (notconnect)
Last input 17w0d, output 17w0d, output hang never
GigabitEthernet0/15 is down, line protocol is down (notconnect)
Last input 17w0d, output 17w0d, output hang never
GigabitEthernet0/16 is down, line protocol is down (notconnect)
Last input 17w0d, output 17w0d, output hang never
GigabitEthernet0/17 is down, line protocol is down (notconnect)
Last input never, output never, output hang never
GigabitEthernet0/18 is down, line protocol is down (notconnect)
Last input 2y30w, output 1y29w, output hang never
GigabitEthernet0/19 is up, line protocol is up (connected)
Last input never, output 00:00:01, output hang never
GigabitEthernet0/20 is up, line protocol is up (connected)
Last input 2y30w, output 00:00:01, output hang never
GigabitEthernet0/21 is down, line protocol is down (notconnect)
Last input 2y30w, output 1y29w, output hang never
GigabitEthernet0/22 is up, line protocol is up (connected)
Last input 00:00:03, output 00:00:00, output hang never
GigabitEthernet0/23 is down, line protocol is down (notconnect)
Last input 13w0d, output 13w0d, output hang never
GigabitEthernet0/24 is up, line protocol is up (connected)
Last input 00:00:01, output 00:00:00, output hang never
GigabitEthernet0/25 is up, line protocol is up (connected)
Last input 00:00:00, output 00:00:14, output hang never
GigabitEthernet0/26 is up, line protocol is up (connected)
Last input 00:00:00, output 00:00:18, output hang never
GigabitEthernet0/27 is down, line protocol is down (notconnect)
Last input never, output never, output hang never
GigabitEthernet0/28 is down, line protocol is down (notconnect)
Last input never, output never, output hang never
Last input never, output 00:00:00, output hang never
Port-channel11 is down, line protocol is down (notconnect)
Last input never, output 17w0d, output hang never
Port-channel12 is down, line protocol is down (notconnect)
Last input never, output 17w0d, output hang never
Con este resultado podemos deducir que;
1.- Teniendo en cuenta que el equipo lleva encendido 2 años, 25 semanas, 16 horas y 39 minutos.
2.- Cuando en una interfaz como por ejemplo en la interfaz GigabitEthernet0/6, nos aparece el resultado : Last input never, output never, output hang never. podemos garantizar que no ha habido conectado nada en el tiempo máximo que lleva el equipo encendido.
3.- Tomando como ejemplo la interfaz GigabitEthernet0/10 con solo que nos de un resultado con tiempo de Last input, output o output hang daremos por activa la interfaz.
4.- Si nos aparece un resultado como este; Last input 13w0d, output 13w0d, output hang never, entendemos que la interfaz lleva inactiva 13 semanas.
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