[Lista ArNOG] input errors

[Ivan Chapero]

En mi caso, sobre un CISCO ISR 3825 me volví loco al cuete, el incremento
de ese mismo counter (ignored) se daba por tramas de un protocolo L2
propietario del switch a donde estaba conectado el router. Un
Allied-Telesis, la feature era loopback-detect, algo así como un
mini-spanning-tree.

Supongo que esto se podría extender a cualquier protoclo L2 o BPDU que le
llegue a una interfaz del router y el stack del mismo no la pueda
interpretar.

2017-10-11 19:02 GMT-03:00 Fernando R. Soto <fsoto en fi.uba.ar>:

> Hola. Tengo estos input errors en una interfaz…
>
> Alguno con experiencia en esos errores?
>
> Sera un host detrás que manda mal los paquetes?
>
> Como lo rastreo? Port mirror y wireshark?
>
>
>
>
>
> R1DC#show interfaces fastEthernet 0/1
>
> FastEthernet0/1 is up, line protocol is up
>
>   Hardware is i82543 (Livengood), address is 0007.8429.2c06 (bia
> 0007.8429.2c06)
>
>   Description: DCN-CORP-MNG
>
>   MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
>
>      reliability 255/255, txload 13/255, rxload 7/255
>
>   Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
>
>   Keepalive set (10 sec)
>
>   Full-duplex, 100Mb/s, 100BaseTX/FX
>
>   ARP type: ARPA, ARP Timeout 04:00:00
>
>   Last input 00:00:00, output 00:00:00, output hang never
>
>   Last clearing of "show interface" counters 00:02:54
>
>   Input queue: 3/75/34/2468 (size/max/drops/flushes); Total output drops: 0
>
>   Queueing strategy: fifo
>
>   Output queue: 0/40 (size/max)
>
>   30 second input rate 3012000 bits/sec, 1741 packets/sec
>
>   30 second output rate 5172000 bits/sec, 3742 packets/sec
>
>      313428 packets input, 66419283 bytes
>
>      Received 3669 broadcasts (0 IP multicasts)
>
>      0 runts, 0 giants, 6 throttles
>
>      403 input errors, 0 CRC, 0 frame, 0 overrun, 403 ignored
>
>      0 watchdog
>
>      0 input packets with dribble condition detected
>
>      681911 packets output, 129437759 bytes, 0 underruns
>
>      0 output errors, 0 collisions, 0 interface resets
>
>      0 unknown protocol drops
>
>      0 babbles, 0 late collision, 0 deferred
>
>      0 lost carrier, 0 no carrier
>
>      0 output buffer failures, 0 output buffers swapped out
>
> R1DC#
>
>
>
> Includes runts, giants, no buffer, CRC, frame, overrun, and ignored
> counts. Other input-related errors can also cause the input errors count to
> be increased, and some datagrams may have more than one error; therefore,
> this sum may not balance with the sum of enumerated input error counts.
>
>
>
>
>
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>
>


-- 

*Ivan ChaperoÁrea Técnica y Soporte*
Fijo: 03464-470280 (interno 535) | Móvil:  03464-155-20282  | Skype ID:
ivanchapero
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