Can there be an Ethernet Switch that doesn't work with Linux???

[geoffrey mendelson]

On Aug 29, 2010, at 11:40 AM, Nadav Har'El wrote:
>>
>
> Like I said on a previous mail, the speed negotiation works. The  
> guess that
> the switch has a bug and forgets my computer's MAC address makes  
> sense, but
> how come it forgets the Linux computer's and remembers the Windows  
> one? :(


Now wait. This is an 8 port hub/switch correct? If you plug the LINUX  
computer into port 1 and the Windows computer into port 2, and the  
WINDOWS computer "sees"  the supposedly missing packets from the LINUX  
computer, then the hub/switch works.

If you are not sure, you can move the computers around until you find  
that all ports work, or there is a bad port. If there is a bad port,  
return the switch. If there is no bad port, then you have a very  
different problem than what you are describing.

BTW, gigabit ethernet is not. It is 4 full duplex pairs (send and  
receive on the same wires), 100mbit and 10mbit are 2 half duplex (send  
and receive on different wires). Full duplex on 10 and 100mbit means  
that it is sending data on the send data pair while receiving data on  
the receive pair, 1000mbit it
means it is sending and receiving data on all 4 pairs in both  
directions at once.

You said the autonegotiation works, have you tried to force it to  
100mbit, half duplex?

Also while you are at it, try cutting down your MTU on the Linux  
computers to 256. If it works, up it to 1400.

Geoff.

-- 
Geoffrey S. Mendelson,  N3OWJ/4X1GM
To help restaurants, as part of the "stimulus package", everyone must  
order dessert. As part of the socialized health plan, you are  
forbidden to eat it. :-)