Bandwidth Problems with Freebsd 5.x

[ptitoliv]

Danial Thom a écrit :

>--- ptitoliv <ptitoliv at frenchsuballiance.cjb.net>
>wrote:
>
>  
>
>>Hello everybody,
>>
>>I am writing here because I have a problem with
>>network on freebsd 5.3
>>and 5.4. The machines are pluged in a 100
>>Mbit/s with via rhine network
>>cards. On this same LAN  I have a Debian Sarge
>>computer. When I try to
>>transferts big files beetween the FreeBSD and
>>the Debian, I see that I
>>have an assymetric bandwith :
>>
>>>From Debian to BSD : No problem. The bandwitdh
>>is OK : About 8 MBytes/s
>>which is normal for a LAN I guess.
>>>From BSD to Debian : The bandwidth is quite
>>awful => Beetween 300
>>KBytes/s to 1Mbyte/s.
>>
>>Network have been changed and the problem is
>>still the same. So I
>>thought it was a network problem. Then I
>>installed an other FreeBSD on a
>>different computer and plugged it in a
>>completely different network and
>>the problem is still here. That's why I think
>>there is a thing to
>>configure on the BSD system but I don't know
>>why.
>>
>>That's why I am looking here for someone who
>>knows this problem and who
>>will be able to help me.
>>
>>Thank you for your answers
>>
>>Best Regards,
>>ptitoliv
>>    
>>
>
>Are you doing "GET" from each machine, or
>comparing GET to PUT? Get has always been a lot
>faster then PUT. 
>
I tried GET and PUT from the two servers and the problem is still the same.

>Put a monitor on the LAN and
>look for weird sending patterns. The 4.x FTP
>servers will stop altogether if you set the
>window under 1500 bytes. I don't know if its the
>server app or the stack, but its probably the
>specific application, as HTTPD seems not to have
>such problems.
>
The problem still exists with HTTP and SCP requests.