[Udpcast] "--full-duplex" option in cast-o-matic initrd images

Alain Knaff alain at knaff.lu
Sun Jan 31 00:30:59 CET 2010

Tom Carpenter wrote:
> Jens, et al,
> Careless reading on my part.
> Sorry to revisit this. Do you know if udp-receiver is configured
> to only use half-duplex mode? If so, why have a "--full-duplex"
> option for udp-sender if udp-receiver can only operate in
> half-duplex mode?
> A related question: do the --full-duplex/--half-duplex options
> configure udp-sender's behavior, the network adapter, or both?

The full-duplex mode only configures udp-sender's behavior (whether it
sends out more data packets while waiting for the acknowledgement of the
previous slice or not).

So, this is an option that's only relevant on the sender.

I've changed cast-o-matic so that you can now enter options which only
apply to the receiver, or only to the sender



> Jens Breuer wrote:
>> Hello Tom,
>> this is only partially true.
>> The section indeed begins with
>> "The following networking options should be supplied both on the
>> sender and the receivers:"
>> But if you read on further you'll find
>> "The following networking options should be supplied only on the sender:"
>> right before the explanation of --mcast-data-address which is in the
>> same block as --full-duplex.
>> I would agree that this is not well highlighted in the documentation.
>> To be honest I am not sure if I explicitly used --full-duplex in the
>> past (and now) so I am probably not of much help for the question of
>> autonegotioation.
>> Kind regards
>> Jens
>> On Tue, Jan 19, 2010 at 9:53 PM, Tom Carpenter <tomc at bio.umass.edu> wrote:
>>> Jens,
>>> Yes, I did try to use "--full-duplex" as an option for a
>>> 'receiver' image. Based my reading of the information on
>>> this page
>>> --------------------------------
>>> http://udpcast.linux.lu/cmd.html
>>> Networking options
>>> The following networking options should be supplied both
>>> on the sender and the receivers:
>>> --full-duplex
>>> and
>>> --half-duplex
>>> --------------------------------
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