Re: checksum offloading

["Yuniesky Machado" <ymachado@inivit.cu>]

> El Thu, 08 Apr 2010 08:12:15 -0400, Yuniesky Machado escribió:
>
>> Alguien puediera decirme el por que no puedo midificar este parametro en
>> mi tarjeta de red
>>
>> ethtool -K eth0 tx off
>> Cannot set device tx csum settings: Operation not supported
>
> Es posible que te diga la verdad, es decir, que la tarjeta (o los
> drivers) no lo admitan.
>
> Según el manual (man ethtool) si ejecutas "ethtool -k eth0" te dirá los
> parámetros que permite modificar.
>
> Saludos,
>
> --
> Camaleón
>
>
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>
>

Aqui va el resultado

~# ethtool -k eth0
Offload parameters for eth0:
Cannot get device rx csum settings: Operation not supported
Cannot get device tx csum settings: Operation not supported
Cannot get device scatter-gather settings: Operation not supported
Cannot get device tcp segmentation offload settings: Operation not supported
Cannot get device udp large send offload settings: Operation not supported
rx-checksumming: off
tx-checksumming: off
scatter-gather: off
tcp segmentation offload: off
udp fragmentation offload: off
generic segmentation offload: off~# ethtool -k eth0
Offload parameters for eth0:
Cannot get device rx csum settings: Operation not supported
Cannot get device tx csum settings: Operation not supported
Cannot get device scatter-gather settings: Operation not supported
Cannot get device tcp segmentation offload settings: Operation not supported
Cannot get device udp large send offload settings: Operation not supported
rx-checksumming: off
tx-checksumming: off
scatter-gather: off
tcp segmentation offload: off
udp fragmentation offload: off
generic segmentation offload: off


El problema que analizando el trafico de la tarjeta con wireshark

detecte el siguiente problema

Checksum: 0xc9ee [incorrect, should be 0x05bc (maybe caused by checksum
offloading?)]Checksum: 0xc9ee [incorrect, should be 0x05bc (maybe caused by
checksum offloading?)]

Alguien le ha pasado algo similiar que lo haya solucionado

Gracias de Antemano



-- 
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 * Yuniesky Machado Rojas       *
 * Administrador de Redes       *
 * Instituto Nacional de Investigación en Viandas Tropicales
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