[OpenSIPS-Users] Packet Loss and its Solution

[Sammy Govind]

I don't have anything related to these troubleshooting and tweaking readily
available in my mind, I already wrote the pseudo routine/steps to resolve
the issue.
As Sir Bogdan has stated openSIPS dont deal with RTPs so you can safely
conclude right away that its not OpenSIPS causing the packet losses.
I will still insist on focusing/troubleshooting the 1st three layers on
your network or on server.


On Thu, Mar 1, 2012 at 12:04 PM, Faisal Rehman <faisal.rehman22 at yahoo.com>wrote:

> Hi Sammy,
>
> Sure I will paste the stats here but will you please tell me some
> important steps to be performed on software side. Here I am talking about
> the OS, kernel upgrade & advanced system administration level stuff that
> can reduce the packet loss immediately. Through the final conclusions I
> have become to know that its not the OpenSIPS problem but it regards with
> physical, software & network upgrades.
>
> Regards,
>
> Faisal Rehman
>   ------------------------------
> *From:* Sammy Govind <govoiper at gmail.com>
> *To:* OpenSIPS users mailling list <users at lists.opensips.org>
> *Sent:* Tuesday, February 28, 2012 10:38 AM
> *Subject:* Re: [OpenSIPS-Users] Packet Loss and its Solution
>
> Hi Faisal,
>
> Can you copy/paste the stats of "ifconfig eth*N*" on which traffic is
> terminating. I just wanted to see the error and dropped packets on physical
> interface.
> Hardware and physical connectivity plays major role in packet losses.On*Asterisk server
> * Jitter options might help you but this is media-proxy, I assume from
> the interface you are viewing, the packets are shown as lost. So could it
> be heavy media traffic flowing through the interface and media proxy is
> unable to use much CPU processing power to process all the RTPs ?
>
> Before troubleshooting the software application I suggest start digging
> the networking interfaces and tweak the eth*N and *related properties of
> kernel to maximize the throughput.
>
> This would be just how I'd go with this kind of problem.
>
> Regards.
> Sammy
>
>
> On Tue, Feb 28, 2012 at 3:45 AM, Muhammad Danish Moosa <
> danishmoosa at gmail.com> wrote:
>
> Helo Bogdan
>
> only signalling packets can be lost on opensips?
>
> But rtp streams are faster and frequent and have high impact on voice
> quality. He seems to ask packet losses on rtp packets. Even if the problem
> is identified what are the clues to solve the problem?
>
>
>
> On Tue, Feb 28, 2012 at 3:14 AM, Bogdan-Andrei Iancu <bogdan at opensips.org>wrote:
>
> **
> Hi Faisal,
>
> Let me comment a bit on the loss at software - packages can be discarded
> at TCP/IP stack level (by kernel) if no application is reading the data
> (or no reading as fast as the data comes).
>
> You can check on this (if opensips is able to process all incoming
> traffic, without having the kernel to discard data because of full
> buffering on sockets) via some statistics from the NET class :
>         http://www.opensips.org/Resources/DocsCoreStats17#toc17
>
> An overall idea over the load in opensips (if you have idle processes or
> not) can be monitored via the LOAD stats:
>         http://www.opensips.org/Resources/DocsCoreStats17#toc14
>
> Regards,
> Bogdan
>
>
> On 02/27/2012 04:02 PM, Faisal Rehman wrote:
>
>     Hi Everyone,
>
>  I am facing huge packet loss in my server, so I am here to share with
> you some of the output of packets losses that you can see in attached
> image. Secondly I have few questions that I want to discuss with:
>
>  1. How can we reduce the packet loss to a minimum in an asterisk server,
> I mean I just want to know more detailed info about packet loss reduction.
> 2. I am calculating packet loss following that link
> http://www.linuxjournal.com/article/9398 where there is written that 20%
> loss is acceptable, but if you see the attached image what will be your
> conclusions about packet loss here?
> 3. At last but not least I just want to know the responsibilities of the
> software & the network, I mean how much software or network is responsible
> for packet loss?
> 4. What are the best possible ways to reduce the packet loss to a minimum
> extent?
>
>
> Regards,
>
>  Faisal Rehman
>
>
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>
>
> --
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developerhttp://www.opensips-solutions.com
>
>
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>
>
> --
> Muhammad Danish Moosa
>
> " The core of mans' spirit comes from new experiences. "___ Christopher
> McCandless
>
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