[CentOS] need help on second Ethernet port (eth1) point to point connect

William L. Maltby CentOS4Bill at triad.rr.com
Sun Sep 2 17:40:55 UTC 2007


On Wed, 2007-08-29 at 23:21 +0800, mcclnx mcc wrote:
> setup IP address as "192.168.xxx.xxx" does NOT work. 
> Someone say I need use "crossover" type of cable, but
> I don't have.  I put a switch and coneect cable from
> each PC and it work fine.

Crossover cables are easy. I make my own straight-through and crossovers
when needed.

Regardless, the others were right: you *did* need a crossover *until*
you put an auto-sensing switch into the mix. I have one of these on my
home network (SMCGS8 unmanaged) and have sense not made up any custom
cables.

As others have stated though, I do have both cross-over and straight
patch cables on-hand JIC.

Anyway, if you make your own, when the RJ-45 connectors are held side-
by-side clips down facing same direction:

straight = colors occur in same sequence in both
cross-over = colors occur in "mirror" sequence.

For GB E'net, this is more important as two pairs are used. For 10Mb,
only one pair is used, so the simple reverse TX/RX works.

Hmmm... I'm assuming USOC 568A wiring? Can't remember. Anyway, the pin
assignments are the same. Only the color sequence is different.

> 
> Thanks.
> 
> 
>  
> --- gnulinux <gnulinux at comcast.net> 說:
> 
> > mcclnx mcc wrote:
> > ><snip>

--
Bill




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