[mythtv-users] Dumb Ethernet Question on Debian

[cossaboon.mythtv at mac.com]

On Nov 7, 2005, at 7:30 PM, 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.
>
> Chris...
>
> -- 
> "Those who would give up essential liberty to purchase a little
> temporary safety deserve neither liberty nor safety" -- Benjamin
> Franklin
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>

I have a Cisco Switch, and my networking background is to not let  
anything static do any 'auto'. I want FD, so the switch is set to FD,  
and the Server should also be set to FD.

As mentioned duplex problems are usually a wiring issue, and that  
would need to be fixed if there is an issue with FD.

FD works fine, no errors on ether Server or Switch (when I set it  
with mii-tool), but Debian wants to 'auto negotiate' and fails, and  
fall to HD, the Switch being locked at FD, causes collisions on the  
server side (normal duplex issue).

If I let it 'auto' and it chooses HD, this would suck (about 33mbps  
is all that one could expect from 100m HD). I want FD, so why not set  
the network the way it should be, resolve any issue (such as NIC not  
coming up in locked FD).

For PC or 'public ports' switches should be auto-negotiated, to  
permit what ever PC/laptop plugs in to work, but a Server should be  
static.

I will dig deeper, I can not believe that there is a server OS that  
does not permit locking of Duplex and Speed.


From:
     Kevin Cossaboon
     Home MAC Mini Computer
     http://www.cossaboon.net
     cossaboon.mythtv at mac.com