[OpenSIPS-Users] Packet Loss and its Solution

[Faisal Rehman]

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 ethN" 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.OnAsterisk 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 ethN 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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Users mailing list Users at lists.opensips.org http://lists.opensips.org/cgi-bin/mailman/listinfo/users 
>>
>>
>>-- 
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
>>_______________________________________________
>>Users mailing list
>>Users at lists.opensips.org
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>>
>>
>
>
>-- 
>
>Muhammad Danish Moosa
>
>" The core of mans' spirit comes from new experiences. "___ Christopher McCandless
>
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>

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