[asterisk-users] Asterisk might be dropping RTP packets before reaching eth int?

[Steve Totaro]

On Wed, Aug 13, 2008 at 7:40 PM, Jonathan Miller <iamfromit at gmail.com> wrote:
> From what I can determine while troubleshooting a voice-dropping
> issue, the Asterisk server in my organization has been dropping RTP
> packets between the asterisk server process and the network interface.
>
> I determined this from an RTP debug that showed packets sent to the
> phone and packets received from the phone during the entire call. A
> tcpdump done on the server for the interface that would deliver the
> packet to the wire does not show the packets.
>
> Is there somewhere I can look to resolve this? Something anybody has
> come across? It is happening frequently and with great discomfort to
> many users.
>
> I had upgraded from 1.2.x to latest 1.4.x in attempts to resolve this.
> I also disabled a lot of COM/LPT and USB devices in the BIOS to free
> up some IRQ's. no devices are sharing IRQ's at this point, with I
> thought might have been part of the issue, but has proved to at least
> not be directly related.
>
> These calls are from a PRI to a Cisco 7940 using SIP. There is a
> Juniper EX switch between the two. Both sides negotiate at
> 100Mbps/Full Duplex.
>
> I have ruled the switch out of the problem as it's not seeing the
> packets on the wire when the issue is occuring.
>
> Please help or point me to someone that can.
>
> -Jonathan
> iamfromit at gmail.com

Jonathan,

It sounds hardware specific to me.  Is this a new install or a new problem?

If it is a new problem, then what has changed?  Is the NIC in question
onboard?  What hardware are you using?  Brands, MoBo, NIC, etc...

If I were you, I would remove or disable the NIC and stick a tried and
true old school 3Com NIC in the server and try that.

Thanks,
Steve Totaro