[Asterisk-Dev] RTP not sending UDP checksums?

[Michael Loftis]

--On Monday, February 28, 2005 09:38 +0100 Andreas Sikkema 
<andreas.sikkema at ritstele.com> wrote:

> asterisk-dev-bounces at lists.digium.com wrote:
>
>> I'm running asterisk on Linux kernel 2.6.7-1-686-smp. When I
>> do a tcpdump of traffic to/from asterisk/device tcpdump
>> reports that asterisk (linux) is not generating UDP checksums.
>
> Are you capturing on the same machine as Asterisk is running?
> If so, then the process of capturing might be done before
> checksums are created.

This is a possibility, there are a decent number of hardware supported 
offload engines built into ethernet cards nowadays....though I don't know 
how many support UDP...but if yours does then you could end up without UDP 
checksums until it actually goes out on the wire.