[mythtv-users] Dumb Ethernet Question on Debian

Kevin Kuphal kuphal at dls.net
Mon Nov 7 21:23:30 EST 2005


Chris Trown wrote:

> Rudy Zijlstra wrote:
>
>> cossaboon.mythtv at mac.com wrote:
>>
>>> Anyone know how to make this STICK so it is inplace after reboot :(
>>>
>>> Thanks
>>> On Nov 4, 2005, at 2:08 PM, Kevin Kuphal wrote:
>>>
>>>> cossaboon.mythtv at mac.com wrote:
>>>>
>>>>
>>>>> Where do you set the duplex and speed of your NIC in Debian (or  
>>>>> Linux).
>>>>>
>>>>> My server is in half duplex (as I have collisions showing in   
>>>>> ifconfig) and my through put sucks ((1.2 gig file is taking 60  
>>>>> hours!)
>>>>>
>>>>> I can not seem to find this anywhere?
>>>>>
>>>>> Thank you in advance.
>>>>>
>>>>>
>>>> If it is anything like my redhat system,
>>>>
>>>> man mii-tool
>>>>
>>>> Kevin
>>>>
>> Why don't you check why it is going to half-duplex? This usually 
>> indicates a serious problem, as this is the last fall-back of 
>> auto-negotiation....
>> Problem can range from:
>> - faulty switch
>> - incorrect switch setting
>> - faulty cable
>>
>> forcing to full duplex without researching the underlying problem 
>> will likely only generate more problems. Also the transmission time 
>> you mention is indicating more problems than just duplex mismatch.
>>
>
>
>      I'll second this.  There was a time when setting the speed/duplex 
> was almost required for Cisco switches.  Not sure anymore.  Trying to 
> force speed/duplex on an HP switch will cause nothing but problems.
>
>      I say start with everything auto and go from there.
>
>
Just from my own experience, it is not uncommon to see duplex 
incorrectly detected between various cards and switches.  We have had 
situations where we needed to set the duplex (which is where I 
remembered the command from), but we're way OT now.

Kevin


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