[CentOS] 2 Ethernet cabling question

Bowie Bailey Bowie_Bailey at BUC.com
Tue Dec 28 14:20:23 UTC 2010


On 12/25/2010 9:42 AM, S Mathias wrote:
> Two questions that was not always clear for me [sorry for posting to this list :\]:
>
> ##############################################################################################
>
> Q1) when cabling, is the color order important? like:
>
> straight cabling:
> A side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown
> B side: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown
>
> could be eg.: like this??
> A side: white-orange, brown, white-blue, green, white-green, blue, white-brown, orange
> B side: white-orange, brown, white-blue, green, white-green, blue, white-brown, orange

The colors are not important aside from standardization.  If you need to
fix one end of the cable, you have to make sure it's the same as the
other end.  If you use the standard color scheme, that is not a problem.

What IS important is the pairing.  In your second example, you have
messed up the pairings.  This may work, but is not optimal.  You could
do something like this:

    white-brown, brown, white-orange, blue, white-blue, orange,
white-green, green

But there is really no reason for it.  Just stick to the standard colors
and save yourself (and anyone else who works on the cabling later) the
headaches.

> ##############################################################################################
>
> Q2) again cabling.. i know what is the color order of straight and crossover cabling. BUT: what are the color orders, when i need to create physically two separated networks?

Sorry, I don't follow this question.

-- 
Bowie



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