looking for a board/chipset for an internal switch...

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hi...

i'm considering a system/box which would have multiple internal
motherboards. i want to create this from off th shelf/fry's parts. i'm
trying to find out if anyone knows where i can find a board that i can
use that will provide me with the ability to have an interanl 10/100M
switch functionality.

i envision the ethernet cable entering the box, and then splitting the
ethernet connection to the various inputs on the boards. are there
chipsets that you know of that i should look into for this?

are there sites on the net that might shed more light into this issue?

doing a google hasn't shown a lot of options...
thanks

bruce
bedouglas@earthlink.net
 
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i know what it's called.. and i don't what a hub functionality. i want'
a switch functionality... hub functionality essentiallt splits up the
bandwith between the ports... i want to implement switching
functionality, as i want to be able to have the ports to have access to
the 10/100M bandwidth simultaneously.

however, i'm still trying to find out if there's a board/chipset that
can be inserted inside a box for this purpose. (short of me ripping the
guts out of a 4 port switch and inserting the board inside the box!
thanks

bruce
bedouglas@earthlink.net
 
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the problem with the 'ripping' soln... is that it's only going to work
for a prototype.. for a production system/situation... i'm going to
need a board/chipset solution...
thanks

bruce
bedouglas@earthlink.net
 
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In article <1103413354.788104.203350@f14g2000cwb.googlegroups.com>,
<usc_dog@yahoo.com> wrote:
>the problem with the 'ripping' soln... is that it's only going to work
>for a prototype.. for a production system/situation... i'm going to
>need a board/chipset solution...
>thanks
>
>bruce
>bedouglas@earthlink.net
>


Cut open a cheap switch and see who made the main chip and the part
number. Contact the maufacturer and see if they can sell you the chip
and related parts, and they'll cladly give you a prototype circuit
design.


--

a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore.
 
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In article says...
> hi...
>
> i'm considering a system/box which would have multiple internal
> motherboards. i want to create this from off th shelf/fry's parts. i'm
> trying to find out if anyone knows where i can find a board that i can
> use that will provide me with the ability to have an interanl 10/100M
> switch functionality.
>
> i envision the ethernet cable entering the box, and then splitting the
> ethernet connection to the various inputs on the boards. are there
> chipsets that you know of that i should look into for this?
>
> are there sites on the net that might shed more light into this issue?
>
Its called a network hub. Unlike a router, a hub broadcasts the same
info over all ports.


--
Conor

A man alone in the forest is talking to himself and no women around to
hear him. Is he still wrong?
 
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ok....

it looks like 'realtek' provides the chipsets that i could eventually
use.... actually, the chip that was mentioned in the above reply is
seriously overkill!!!

at this stage, i's probably be comfortable with kludging a chassis,
with the multiple power supplies/boards/drives/etc... as well as the
board for the switch/router..

i'd like to have a single external eth connection at the exterior of
the box, and handle the separate router/switching functions between the
two boards by the internal switch/router board. i'll have to run the
eth cable from the switch card, to the two boards internal to the
system....

i'm assuiming that in quantity, a 3rd party/manufacturer could do the
board with the right chipset/ref design, for a few $$$.

-bruce
bedouglas@earthlink.net

ps.. by the way, i wasn't aware that fry's carried networking
chips/chipsets that could be used as the basis for routers/switches....
 
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On 18 Dec 2004 13:49:05 -0800, usc_dog@yahoo.com wrote:

>i know what it's called.. and i don't what a hub functionality. i want'
>a switch functionality... hub functionality essentiallt splits up the
>bandwith between the ports... i want to implement switching
>functionality, as i want to be able to have the ports to have access to
>the 10/100M bandwidth simultaneously.
>
>however, i'm still trying to find out if there's a board/chipset that
>can be inserted inside a box for this purpose. (short of me ripping the
>guts out of a 4 port switch and inserting the board inside the box!
>thanks


Ripping the guts out of a 4 port switch will be vastly
superior to any other alternative. It will be smaller, use
far less power, quieter, less expensive, less heat, and
probably faster too.

On the other hand there might be some PCI switch cards in
the market, I think I've seen one but don't recall where.
 
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In article Al Dykes says...

>
> Cut open a cheap switch and see who made the main chip and the part
> number. Contact the maufacturer and see if they can sell you the chip
> and related parts, and they'll cladly give you a prototype circuit
> design.
>
No they won't. They'll licence it to you but it'll cost $1000's.


--
Conor

A man alone in the forest is talking to himself and no women around to
hear him. Is he still wrong?
 
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In article says...
> the problem with the 'ripping' soln... is that it's only going to work
> for a prototype.. for a production system/situation... i'm going to
> need a board/chipset solution...
> thanks
>
How good are you at electronics? By good I mean are you happy designing
multi layered PCBs using SMD sized components?


--
Conor

A man alone in the forest is talking to himself and no women around to
hear him. Is he still wrong?
 
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On 18 Dec 2004 15:42:34 -0800, usc_dog@yahoo.com wrote:

>the problem with the 'ripping' soln... is that it's only going to work
>for a prototype.. for a production system/situation... i'm going to
>need a board/chipset solution...
>thanks
>
>bruce
>bedouglas@earthlink.net

Why will it only work for a prototype?
You claimed need for "off the shelf/fry's parts.
Fry's carries bulk networking chips?

Is it a necessity to produce all boards in-house?
Is it going to be a one-time production run, on-demand,
continual, or ?
Unless you're talking about a huge quantity it may not be
cost-effective to do it yourself.

Given a bulk purchase of the switches certainly you can
simply account for their dimensions when adding standoffs
and appropriate plastic facia cutouts. Do you see where
I"m going with this? Given what you proposed, you already
need the extra PCB anyway, so the remaining question is the
pricing, and whether you can get just the circuit boards or
must buy whole kit in it's plastic or metal shell then
disassemble it, perhaps also retrofitting for an internal
power supply.

For example, the following is an internal pic of a Gigabit 5
port switch, one having front-mounted ports and connection,
power LEDs, and a rear 12V DC/1A power requirement. There
are a number of ways one could mount such a finished PCB in
a different custom enclosure, and many of them even have a
peel-off thick plastic sticker labeling the front, should
you not care about branding on the outside of the chassis
and then not have need to print up additional labeling... we
really dont' know the extent of your project.
http://69.36.189.159/usr_1034/smc_8505t-inside.jpg

....or if you wanted to attach it from the chip angle,
http://www.realtek.com.tw/products/products1-2.aspx?modelid=2003071
 
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usc_dog@yahoo.com wrote:

> i know what it's called.. and i don't what a hub functionality. i want'
> a switch functionality... hub functionality essentiallt splits up the
> bandwith between the ports... i want to implement switching
> functionality, as i want to be able to have the ports to have access to
> the 10/100M bandwidth simultaneously.
>
> however, i'm still trying to find out if there's a board/chipset that
> can be inserted inside a box for this purpose. (short of me ripping the
> guts out of a 4 port switch and inserting the board inside the box!

I was wondering why you don't just do that to begin with.

> thanks
>
> bruce
> bedouglas@earthlink.net
>
 
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On 18 Dec 2004 20:59:30 -0800, usc_dog@yahoo.com wrote:


>i'm assuiming that in quantity, a 3rd party/manufacturer could do the
>board with the right chipset/ref design, for a few $$$.

It'd have to be a really large quantity to be cost-effective
compared to a bulk purchase of an existing switch (design).



>
>-bruce
>bedouglas@earthlink.net
>
>ps.. by the way, i wasn't aware that fry's carried networking
>chips/chipsets that could be used as the basis for routers/switches....

They don't, that was the point... you'd mentioned Fry's but
they DON'T have at all what you're looking for, only
finished products.
 
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In article says...

> i'm assuiming that in quantity, a 3rd party/manufacturer could do the
> board with the right chipset/ref design, for a few $$$.
>
Yeah..the right quantity being in the 1000's and that'll still cost you
$10,000's assuming that you are going to do the PCB designing.

My thoughts at this stage is that you know so little about electronic
engineering, especially designing from scratch, that this is beyond your
capabilities.


--
Conor

A man alone in the forest is talking to himself and no women around to
hear him. Is he still wrong?
 
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conor...

well versed with engineering/designing from scratch.. however, what i'm
looking for in the proto, will be vastly different from the final
design.. if it ever gets to that stage. so.. perhaps you shouldn't be
hasty in your judgement of one's skillset!

peace..


Conor wrote:
> In article says...
>
> > i'm assuiming that in quantity, a 3rd party/manufacturer could do
the
> > board with the right chipset/ref design, for a few $$$.
> >
> Yeah..the right quantity being in the 1000's and that'll still cost
you
> $10,000's assuming that you are going to do the PCB designing.
>
> My thoughts at this stage is that you know so little about electronic

> engineering, especially designing from scratch, that this is beyond
your
> capabilities.
>
>
> --
> Conor
>
> A man alone in the forest is talking to himself and no women around
to
> hear him. Is he still wrong?
 
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i had considered this option... but i was/still am looking for
something a little cleaner/more polished...

peace...
 
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In article says...
> conor...
>
> well versed with engineering/designing from scratch.. however, what i'm
> looking for in the proto, will be vastly different from the final
> design.. if it ever gets to that stage. so.. perhaps you shouldn't be
> hasty in your judgement of one's skillset!
>
What made me doubt your skills was the comment about trying to find off
the shelf parts at Frys which is pretty much guaranteed not to happen.


--
Conor

A man alone in the forest is talking to himself and no women around to
hear him. Is he still wrong?