[K12OSN] Re: New amer.com switch troubles

[Huck]

I have 1gig speed on cat 5e...
but I did end up having to move my server closer to the switch closet...
as the 300+ ft run I had it going over connected initially at 
1000...then dropped to 100 sometime later...noticed by the immense lag 
of 20 machines attempting to access the server at once.



gKw-X wrote:
> Hello,
> 
> I emailed recently about this problem and I want to bring it up again. I 
> have a 1gig switch from amer.com and a 1gig intel nic in my server, but 
> for some reason the connection between the server and the switch will 
> not go over 100meg speed...
> 
> I have tried a couple commands to tell it to re-negotiate, and to tell 
> it to go at 1000meg/full duplex, but it always ends up back at 
> 100meg/full duplex. This is one of the commands I tried:
> 
> ethtool -s eth0 duplex full speed 1000
> 
> I have had several people suggest the cabling, I will give that another 
> try, but it's a long drive to go in and I would like to have some other 
> options when I do. What commands should I be running to verify the 
> connection, and to change it? Is there any config anywhere that might 
> tell it to use 100meg only? Or is it guaranteed to be a problem outside 
> of the server?
> 
> I've heard certain kernels have trouble with 1gig speed. I don't know 
> what version I have, but I downloaded k12ltsp in early August. Someone 
> specifically mentioned that kernel version "2.6.11" and earlier has 
> troubles with GB ethernet? Has anyone else ever had similar troubles or 
> did it just magically work?
> 
> Also, I am pretty sure the cable is cat5e, and cable from the same spool 
> is used between the swithes, and that connection reports 1000meg speed 
> on the switch, so the cable should be fine, correct? Unless that one 
> cable was badly crimped or by sheer bad luck has a flaw. Someone 
> suggested I need cat6 cable, is this true?
> 
> Thanks for your input!
> 
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