[HARDWARE] Has anyone looked into USB networking for a small rack of motherboards.

mR gOBLIN goblin at scooter.co.nz
Sun Nov 1 22:29:21 EST 1998

Umm.... just as a matter of interest.....
If anyone is looking for info on harware pin-outs, connections etc
try this place
I have found it very useful in the past


Joe Zbiciak wrote:

> 'Timothy Baldwin' said previously:
> | > SLIP (and any other TCP/IP encapsulation technique) need bidirectional
> | > links, because TCP needs a bidirectional link.   (How else would
> | > something as simple as the standard three-way-handshake work?)
> |
> | Nonsense
> |
> | TCP uses IP and will work if IP packets can be sent to and received from
> | the remote host. SLIP is a pure encapsulation protocol (unlike PPP) and
> | therefore can work with unidirectional links.
> [...]
> | The IP layer will take care of this, by routing packets round the ring.
> SLIP is indeed merely an IP-encapsulation protocol, and if all of the
> required routes exist between any two given nodes, then yes, the IP
> routing layer will do all of the dirty work.
> I'm slapping myself for not looking more closely through the RFC
> before opening my big mouth.  (Interested parties can read RFC 1055
> at   http://www.cis.ohio-state.edu/htbin/rfc/rfc1055.html   ).  I was
> under the impression that SLIP required some amount of feedback from
> the host it was communicating with, eg. for negotiating parameters,
> etc. but it does not.  PPP does, though.  I had remembered that SLIP
> was much more limited than PPP, but I had forgotten just _HOW_ much
> more limited.  :-)
> Every SLIP implementation I've ever seen expects to send and receive IP
> frames from the same host, and so I've always assumed that the SLIP
> protocol required at least a bi-directional link.  It does not; this
> imagined requirement is due to the implementations, not due to the
> protocol.  It merely specifies how to frame an IP packet.  (And at
> that, the required framing is very, very simple.)
> Does anyone know of a _complete_ unidirectional SLIP implementation? :-)
> A simple high-level implementation of "send_packet" and "recv_packet"
> do exist in the RFC that can be used as a starting point.
> BTW, Tim, thank you for slapping me about a bit.  I was severely
> lacking a clue there for my past couple posts.  :-)
> Regards,
> --Joe
> --
>  +------ Joseph Zbiciak -----+
>  | - - j-zbiciak1 at ti.com - - |  "The meaning of a value is determined
>  |-Texas Instruments, Dallas-|   by how it is used."
>  | - #include <disclaim.h> - |                          -- Ousterhout
>  +---------------------------+
> --
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