Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?

Wed, 16 Jul 2014 13:13:35 -0700 

<br />Take a look at netstat -s and see if that helps isolate if or where 
packet loss is occurring. For example in the udp: section there are statistics 
for total datagrams tx/rx along with dropped, bad checksums, etc. <br /><br 
/>UDP has no retransmission feature built in so bad checksums and bad packets 
get dropped. Any sort of retransmission of dropped packets must be in the 
software. <br /><br />[Brad Hein]<br />


Take a look at netstat -s and see if that helps isolate if or where packet loss is occurring. For example in the udp: section there are statistics for total datagrams tx/rx along with dropped, bad checksums, etc.

UDP has no retransmission feature built in so bad checksums and bad packets get dropped. Any sort of retransmission of dropped packets must be in the software.

[Brad Hein]


----- Original Message -----
From: [email protected]
To: [email protected]
Sent:Wed Jul 16 07:50:05 UTC 2014
Subject: Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?


It is my understanding that the UDP protocol does not quarentee delivery to the destination.  That  is, it has no recovery mechanism for undelivered packets.

Alan

 

 

From: [email protected] [mailto:[email protected]] On Behalf Of Marcus Leech
Sent: Wednesday, July 16, 2014 11:09 AM
To: [email protected]
Cc: [email protected]
Subject: Re: [Discuss-gnuradio] Why am I dropping data over the UDP network?

 

I'm talking about the UDP traffic between the host and the N2xx device.

 

 

 

on Jul 16, 2014, madengr <[email protected]> wrote:

Marcus,

What OS are you using? I had the same issue (UDP not getting through on
receive side) with Fedora 20, even with Firewall "supposedly" turned off
(i.e. Trusted Zone selected). Manually adding the port exemption (I believe
I used port 65000) let the UDP through and it worked.

Lou
KD4HSO


Ward, Marcus D. wrote
> I don't think it's a firewall rule problem, but do you think opening up
> ports would solve my problem? I know the port I'm currently using on the
> TCP connection is port#: 1234 which deals with Mercurial and git default
> ports for serving Hyper Text.
>
> When I had the UDP connection, I was using the same port (1234) except
> that in UDP, that port deals with a VLC media player.





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