[Nfd-dev] [Ndn-interest] UDP_retransmissiom

[Klaus Schneider]

Did you make sure that you are not sending more packets than the link 
can handle?

Retransmissions are only one aspect of TCP; another one is to slow down 
the sending rate before/once the link becomes congested.

Best regards,
Klaus


On 12/01/18 02:21, Giuseppe Carella wrote:
> Good morning,
> 
> I have done what you told but I still continue to loose some packets, 
> much less than before but I still continue to loose:
> 
> This is what I have done:
> Consumer:
> nfdc face create udp4://$1 reliability on
> nfdc route add /app1 udp4://$1
> 
> Producer:
> nfdc face create udp4://$1 reliability on
> 
> 
> Should it be enough, right?
> 
> Thank you.
> Giuseppe
> 
> 2018-01-10 19:49 GMT+01:00 Davide Pesavento <davide.pesavento at lip6.fr 
> <mailto:davide.pesavento at lip6.fr>>:
> 
>     Giuseppe,
> 
>     You didn't need to change the code. As Eric said, to enable the
>     LpReliability feature, you can specify "reliability on" when creating
>     a face with nfdc.
> 
>     That being said, make sure you enable LpReliability on *both* ends of
>     the link, otherwise the receiver won't know that it has to send ACKs
>     back.
> 
>     Best regards,
>     Davide
> 
>     On Wed, Jan 10, 2018 at 10:10 AM, Giuseppe Carella
>     <gcarella228 at gmail.com <mailto:gcarella228 at gmail.com>> wrote:
>      > Good morning Eric,
>      >
>      > I tried to use this functionality changing the NFD code (I set
>     the boolean
>      > variable isEnalbe = true into the file lp-reliability.hpp).
>      > It seems that the retransmission becomes mandatory in this way
>     (every time
>      > the request is sent maxRetx + 1 times).
>      > Does it behave like that or the retransmission verifies only if
>     the ack is
>      > not received within RTO?
>      > Is it possible to customize the value of RTO?
>      >
>      > Thank you.
>      > Giuseppe.
>      >
>      > 2018-01-04 20:18 GMT+01:00 Eric Newberry
>     <enewberry at email.arizona.edu <mailto:enewberry at email.arizona.edu>>:
>      >>
>      >> Hi Giuseppe,
>      >>
>      >> By default, the number of retransmissions is set to 3. The option
>      >> controlling this is in LpReliability::Options as maxRetx.
>     However, currently
>      >> there is no way to set this option using nfdc or any other
>     management tool.
>      >> Therefore, if you want to change this, you would need to modify
>     the NFD
>      >> source code, recompile, and reinstall. There are no options
>     relating to the
>      >> reliability system in nfd.conf.
>      >>
>      >> Eric
>      >>
>      >>
>      >> On 01/04/2018 02:10 AM, Giuseppe Carella wrote:
>      >>
>      >> Good morning Eric,
>      >>
>      >> Thank you for your answer.
>      >> I understood that it's possible to implement the retransmission
>     by means
>      >> of NDNLPv2, which is a protocol located upon the transport layer.
>      >> So I have to set a maximum number of retransmissions, that's all
>     (I hope).
>      >> Is it enough modifying some properties into nfd.conf to choose
>     the maximum
>      >> number of retransmissions or I have to add some new APIs into
>     applicative
>      >> layer?
>      >>
>      >> Thank you.
>      >> Giuseppe.
>      >>
>      >> 2018-01-04 9:31 GMT+01:00 Eric Newberry
>     <enewberry at email.arizona.edu <mailto:enewberry at email.arizona.edu>>:
>      >>>
>      >>> Giuseppe,
>      >>>
>      >>> NFD release 0.6.0 implements a link-layer reliability system as
>     part of
>      >>> NDNLPv2 for unicast TCP, UDP, and Ethernet faces. It can be
>     enabled by
>      >>> specifying "reliability on" when creating (or updating) a face
>     with nfdc. In
>      >>> order for the system to function, it must be enabled on both
>     ends of the
>      >>> link. The above command only enables it on one end.
>      >>>
>      >>> Eric
>      >>>
>      >>>
>      >>> On 01/04/2018 01:24 AM, Giuseppe Carella wrote:
>      >>>
>      >>> Good morning community,
>      >>>
>      >>> is it possible to configure NFD in order to allow an UDP
>     communication
>      >>> with retransmission?
>      >>> I know that I could use TCP, but for my purpose it's necessary
>     having UDP
>      >>> with retransmission.
>      >>>
>      >>> Thank you.
>      >>> Giuseppe.
>      >>>
>      >>>
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>      >>
>      >
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