Tom's Hardware > Forum > General Networking > Network General Discussions > Point to point communications over 100baseT
Ask the community Add a reply
Word :    Username :           
 
Anonymous   01-19-2005 at 08:43:31 PM

Archived from groups: comp.dcom.lans.ethernet (More info?)

 

I have a requirment to communicate between 2 PC's over a point to
point connection at 33Mbps. Other then LVDS what comm protocal
supports these speeds? (I know USB does, but I have not found
a USB host<-->host bridge that supports those speeds.) I know
ethernet does, but I've never seen it used in this manner. Is it
possible to directly connect 2 machines with a 100baseT cable
and just talk to each other without TCP/IP? Is there software
that supports such a beast?

Thanks!
-larry

Add a reply
Sponsored Links
Register or log in to remove.
Anonymous   01-20-2005 at 06:12:57 AM
- 0 +

Archived from groups: comp.dcom.lans.ethernet (More info?)

 

In article <1106174611.055491.178180@c13g2000cwb.googlegroups.com>,
Larry Martell <natkelcri@yahoo.com> wrote:
:I have a requirment to communicate between 2 PC's over a point to
:point connection at 33Mbps.

:Is it
:possible to directly connect 2 machines with a 100baseT cable
:and just talk to each other without TCP/IP?

Yes.

:Is there software that supports such a beast?

Is there a particular need for it to not be TCP based? If so is there
also a requirement that it not be IP based? 33 megabits per second
of payload is well within the capabilities of any modern TCP or IP
stack.

In any case, you can write out raw ethernet packets, and the other end
can read raw ethernet packets. You'll have a little bit of difficulty
in getting the receiver's NIC to accept the packets. I suggest that
you look at 'libpcap' which is well able to do the appropriate
setup for capturing arbitrary packets.
--
Cottleston, Cottleston, Cottleston pie.
A bird can't whistle and neither can I. -- Pooh

Reply to Anonymous
Anonymous   01-20-2005 at 01:01:30 PM
- 0 +

Archived from groups: comp.dcom.lans.ethernet (More info?)

 

Larry Martell wrote:

> I have a requirment to communicate between 2 PC's over a point to
> point connection at 33Mbps. Other then LVDS what comm protocal
> supports these speeds? (I know USB does, but I have not found
> a USB host<-->host bridge that supports those speeds.) I know
> ethernet does, but I've never seen it used in this manner. Is it
> possible to directly connect 2 machines with a 100baseT cable
> and just talk to each other without TCP/IP? Is there software
> that supports such a beast?
>
> Thanks!
> -larry

Sure, just use a crossover cable instead of a straight through
cable.
What distance do you need to do this at? If you are talking more than
the hundred meter limit of UTP without a repeater, then you start to
hit a bunch of issues that make it way more expensive. You do need
a good set of NICs, preferably matching ones to reduce finger pointing
from vendors blaming the other guy rather than solving problems.

--Dale

Reply to Anonymous
Anonymous   01-20-2005 at 08:43:40 PM
- 0 +

Archived from groups: comp.dcom.lans.ethernet (More info?)

 

"Larry Martell" <natkelcri@yahoo.com> writes:

> I have a requirment to communicate between 2 PC's over a point to
> point connection at 33Mbps. Other then LVDS what comm protocal
> supports these speeds?

100 Mbit/s comes to my mind first.

> (I know USB does, but I have not found
> a USB host<-->host bridge that supports those speeds.) I know
> ethernet does, but I've never seen it used in this manner. Is it
> possible to directly connect 2 machines with a 100baseT cable
> and just talk to each other

Sure, just use a crossover cable instead of a straight through
cable. With a crossover cable you can connect two PCs
directly to each other. I have done this many times.

> without TCP/IP? Is there software that supports such a beast?

Ethernet and TCP/IP usually come together.
But there is no need to use TCP/IP protocol with Ethernet.
Ethernet can support many different protocols, and with
suitable software you can just send and receive "raw"
Ethernet packets.


--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/

Reply to Anonymous
Anonymous   01-22-2005 at 05:45:18 PM
- 0 +

Archived from groups: comp.dcom.lans.ethernet (More info?)

 

"Dale Farmer" <dale@cybercom.net> wrote:
>
> Larry Martell wrote:
>
> > I have a requirment to communicate between 2 PC's over a point to
> > point connection at 33Mbps. Other then LVDS what comm protocal
> > supports these speeds? (I know USB does, but I have not found
> > a USB host<-->host bridge that supports those speeds.) I know
> > ethernet does, but I've never seen it used in this manner. Is it
> > possible to directly connect 2 machines with a 100baseT cable
> > and just talk to each other without TCP/IP? Is there software
> > that supports such a beast?
> >
> > Thanks!
> > -larry
>
> Sure, just use a crossover cable instead of a straight through
> cable.
> What distance do you need to do this at? If you are talking more than
> the hundred meter limit of UTP without a repeater, then you start to
> hit a bunch of issues that make it way more expensive. You do need
> a good set of NICs, preferably matching ones to reduce finger pointing
> from vendors blaming the other guy rather than solving problems.
>
> --Dale

If you're talking more than 100 meter, you can either go to fiber-based
Ethernet solutions (100BASE-FX/LX10/BX10), or to 10PASS-TS.

10PASS-TS will give you (more than) 33 Mbps over several hundred meters of
voice-grade twisted pair. It is part of the recently approved "Ethernet in
the First Mile" standard (IEEE Std 802.3ah-2004) and is based on VDSL. There
are proprietary (pre-standard) solutions available on the market as well.

Michael (remove "filter" from email address)
http://www.ethernetinthefirstmile.com

Reply to Anonymous
Ask the community Add a reply
Tom's Hardware > Forum > General Networking > Network General Discussions > Point to point communications over 100baseT
Go to:

There are 1111 identified and unidentified users. To see the list of identified users, Click here.

Forum map
Bestofmedia Forum ©
2000-2009 Bestofmedia Group
Page generated in 0.326 seconds
Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel
Sponsored links
  • Ask the community now
  • Publish
Ad
Related Topics
See all relatives topics
They won a badge
Join us in greeting them
How do I win badges?