100MBPS? Yeah right..

Quote:

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Originally posted by Fubarian:
<STRONG>


100mbps doesn't mean 100 megabytes a sec, its 100 mega BITS per second. so the TRUE xfer rate at peak is 20 megabytes a sec for 100mbps. On a hub, this'll be divided by the number of connections....

Oh, and make sure you subnet masks are the same - helps stop collisions <IMG SRC="smilies/biggrin.gif" border="0">

Try using a crossover cable too, just from 1 comp to another...</STRONG>

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I know it isn't 100 MB/sec but it's not even 20, or not even 10 or 5! It sometimes takes a few seconds to transfer one 200kb JPEG.. <IMG SRC="smilies/frown.gif" border="0">

Id try setting up the NIC cards to 100mbs Full Duplex then configure the IPX so it runs at 802.3

this should speeds some things up.

I'm confused (even more than usual) I bought a roll of UTP cat5e the other day and have to construct my first trial pear-to-pear network over the next couple of days.

The guy in the computer shop told me it didn't matter how I wired the connectors, as long the wiring order was the same at each connector.

KoWind7, states that:
[quote]
100 mbit cabling should go:
orange/white
orange
green/white
blue
blue/white
green
brown/white
brown
<hr></blockquote>

Note that:
[quote]
orange
green/white
blue
<hr></blockquote>

is not keeping the pairs together (I take "pairs" to mean green/white goes next to green).

However, KoWind7, states:
[quote]
JSYK, the order of the cables does not matter, as long as you keep the pairs together...
<hr></blockquote>

Now I have three different versions of how to wire the connectors, and I have to actually do it tomorrow.

Can someone please clarify all this?

Regards, Les Bentley.

If you want to make 100 meter cable runs then the layout of the wires will matter.
If you're making 2 - 25 meter patch leads it doesn't matter too much.

Making cables to the spec is good practice so if you have the fingers for it, make them to spec.

[quote]
orange/white
orange
green/white
blue
blue/white
green
brown/white
brown
<hr></blockquote>
In this layout, the green and blue pair are input/ output respectively (can't remember which is which though). The reason the pairs are twisted in the first place is to eliminate environmental interference. If a 1 comes through one wire in the pair but not the other it is treated as noise.
Making the cables without twisted pairs for input and output will still carry signal but you won't get any noise cancelation and the cable may display intermittant performance.

I think I've got the right idea but as with all my posts I reserve the right to be completely deluded about technical issues.

From Windriver's own library of help comes

<a href="http://www.duxcw.com/digest/Howto/network/cable/cable2.htm" target="_blank">http://www.duxcw.com/digest/Howto/network/cable/cable2.htm</a>

This will help you.

WSesley

Fubarian,

I was wondering when somone was gonna get around to telling everyone this! LOL WTG bits vs bytes, / by 8

You also need to remember that you will get a theoreticla maximun speed of 80% of your true line speed.
you all have to account for half duplex, which is packet send, stop, packet recieved, stop, packet send...
the other thing is that if one NIC is operating at full duplex, and the other is working at half duplex, you will get ALOT of collisions, which will slow it to a crawl.

[quote]Originally posted by JMM:
<strong>

I know it isn't 100 MB/sec but it's not even 20, or not even 10 or 5! It sometimes takes a few seconds to transfer one 200kb JPEG.. <IMG SRC="smilies/frown.gif" border="0"></strong><hr></blockquote>

thats when you need to start lookin at yer hub. My lil pos 8 port 10/100 Linksys xfers at full speed almost all the time, when no one else is xferin stuff....

SBlive - hehe, you bet!...see what happens when you ed-you-ma-cate people? :D

Kinda like how HDs sizes are in decimal and windows measures it in binary !!

Read <a href="http://www.dalantech.com/bandwidth.shtml" target="_blank">this</a>, it should clear up a few things for all of you.