Re: Serial (rs232 etc.) to IP
- From: Grant Edwards <grante@xxxxxxxx>
- Date: Thu, 27 Oct 2005 14:28:54 -0000
On 2005-10-27, Ignacio G.T. <igtorque.remove@xxxxxxxxxxxxxxx> wrote:
>> If you are using a protocol that was initially written for serial line
>> communication with normal CRC checks and timeout controls, why bother
>> with TCP, just use simple UDP. If the UDP frame is lost, let the
>> original serial line protocol timeout mechanism handle any missing
>> data.
>
> This has at least one problem: these serial line protocols usually
> assume that packets arrive in order.
And unduplicated. I see duplicate packets not infrequently on
my home wireless network, but I don't ever remember seeing
out-of-order packets (though I've never specifically looked for
them either).
> This makes sense for these protocols (I cannot imagine a
> message jumping over the previous one and reaching its destiny
> sooner than the other), but not for IP packets.
Any decent serial protocol would deal with out-of-order or
duplicated packets, but there are a lot of indecent protocols
in use.
--
Grant Edwards grante Yow! I'm rated PG-34!!
at
visi.com
.
- References:
- Re: Serial (rs232 etc.) to IP
- From: Frieder Ferlemann
- Re: Serial (rs232 etc.) to IP
- From: packer44
- Re: Serial (rs232 etc.) to IP
- From: Paul Keinanen
- Re: Serial (rs232 etc.) to IP
- From: Paul Keinanen
- Re: Serial (rs232 etc.) to IP
- From: Ignacio G.T.
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