[KLUG Members] switches vs. hubs

bill members@kalamazoolinux.org
Fri, 02 Apr 2004 15:38:19 -0500


notes below...

Rusty Yonkers wrote:

>>Switched, button pushed to "uplink" and yes, both units have been
>>power 
>>cycled.
> 
> 
> Do you get green lights on both switches showing good connectivity?? 

Yup.

> Is your cable run very long?  

Maybe three feet, maybe two.

> If you have a long run check to make
> sure that the cabling is correct.  

This was a stock cable I had laying around.  Too short for anything 
useful, great for connecting switches.

> I know that when I was initially
> taught to cable I was taught to just run the colors from left to
> right.  Well for longer runs that will not work because you will be
> defeating the functionality of the twisted pair.  

For all the custom cabling, which is just about everything except this 
stock cable, I always swap them, never straight through.

> 1 and 2 need to be
> one color pair (the standard is either striped orange/orange or
> striped green/green, and 3 and 6 need to be another pair, standard is
> opposite of what you just used above.  You would then put blue in 4
> and 5 and brown in 7 and 8 (actually they are not even used truth be
> told).  

Might be easier to just swap out the connecting cable.  But, I'm 
assuming the cable is fine because when I swapped the switch for a hub, 
everything worked fine (didn't even have to power recycle anything).

> I have seen situations if the person just went like orange,
> green, blue, brown then a hub would work but a switch would not. 
> Don't ask me why because I do not know or care really just that it
> has happened for me...  Oh and long would be like over 20 or thirty
> feet.  

Hmmmm...  And a quick check shows I'm out of RJ-45 ends.  Everything 
else laying around is just stock cables (which are usually straight 
through).  I think I have some custom crossover cables I made a while 
back.  I could use one of those and just turn the uplink button off.

The new switch arrived, so experimentation will follow.

kind regards,

bill