[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Ethernet driver 10 not 100 Mbps



Hi,
I had a problems something like that,
In the 10BASE-T mode all is o.k,
but in the 100BASE-TX mode there's many many packet loses.
It's almost impossible to network bootloading.

After changing PHY reference clock ETRAX100LX 25MHz TXER
to extra 25.000MHz oscillator, the problem was vanished.
Maybe somewhat failure of PLL circuit affected the accuracy of clock frequency.

Best Regards,
Hyojun Kim


----- Original Message ----- 
From: "polto" <polto@xxxxxxx.com>
To: <dev-etrax@xxxxxxx.com>
Sent: Friday, June 28, 2002 11:56 PM
Subject: Ethernet driver 10 not 100 Mbps


> 
> Hello all! 
> 
> I patched the ethernet and others file of kernel 2.4.14 and the kernel can 
> now handle large size packets without crashing. 
> 
> Now we have make somes tests with the devboard... our switch show the 
> devboard as a 100 Mbps but the kernel handle only 10 mbps... it's easy to 
> see with iptables on the board and iptraf on the PC ... 
> 
> 
> The second thing is a litle (1 second) sleep of the ethernet in plain BIG 
> BIG ICMP flood ... the board respond at 10 Mbps and some times the ethernet 
> led stop a second and restart to send/receve packeges ... 
> 
> Is it possible to have a real 100 Mbps on the board ?? 
> 
> And we also noticed what where is not enough memory on the board to fragment 
> big packeges with a big speed ... 
> 
> is simple way to add na normal 8 MB compact flash ?? (an old flash from my 
> kodak digital photo) 
> 
>  
> 
> Thanks !! 
> 
> PS: sorry for my english... 
> 
> Alexander Poltorak
> Alsenet S.A.