[App_rpt-users] IAX Ping

Tim Sawyer tim.sawyer at mac.com
Tue Jul 29 23:24:36 UTC 2014


Yes, I have noticeable packet loss in the audio from multiple remote nodes. That’s why I started looking at iax show netstats. The number I’m looking at is percent and while it’s cumulative I would still expect it to be low. I’m going to keep looking around to see if I can figure out what the problem is. Thanks for input and ideas. I'll check out that UDP ping lead. I also saw a IAX ping script written in perl that I plan to check out. 
 
> On Jul 29, 2014, at 7:56 AM, Doug Crompton <doug at crompton.com> wrote:
> 
> Tim,
> 
>  I think you might be comparing apples and oranges. A ping is icmp protocol at the ip level and over a set period of time while the Asterisk statistics are cumulative over the entire time it has been running. It shows loss of iax udp packets which can be expected. Unless the loss is excessive over time I would not worry about it. There is never any guarantee that a udp packet is going to make it to its destination. If it were really bad you would hear it in the audio. There is a way to actually ping tcp and udp connections but I have never done it. My connections show the same minor loss over extended periods of use. Are you actually having a problem?
> 
>  https://github.com/tyru/srvtools
> 
> 73 Doug
> WA3DSP
> http://www.crompton.com/hamradio
> 
> 
> From: tim.sawyer at mac.com
> Date: Mon, 28 Jul 2014 21:45:06 -0700
> To: app_rpt-users at ohnosec.org
> Subject: [App_rpt-users] IAX Ping
> 
> Anyone know why regular ping would show no loss, yet IAX shows there is loss? I’ve even seen localhost connections with IAX loss. Which makes me think there is something other than a network problem.
> 
> Here’s an example… 0% loss ICMP ping yet 7% IAX loss:
> 
> --- 208.70.77.197 ping statistics ---
> 100 packets transmitted, 100 received, 0% packet loss, time 99159ms
> rtt min/avg/max/mdev = 5.939/7.540/10.921/0.882 ms
> [root at IronSystem ~]# asterisk -r
> Asterisk 1.6.2.24, Copyright (C) 1999 - 2010 Digium, Inc. and others.
> Created by Mark Spencer <markster at digium.com>
> Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
> This is free software, with components licensed under the GNU General Public
> License version 2 and other licenses; you are welcome to redistribute it under
> certain conditions. Type 'core show license' for details.
> =========================================================================
> Connected to Asterisk 1.6.2.24 currently running on IronSystem (pid = 19087)
> Verbosity is at least 3
> IronSystem*CLI> iax2 show netstats
>                                 -------------- LOCAL ---------------  ------------- REMOTE ---------------
> Channel                    RTT  Jit  Del  Lost   %  Drop  OOO  Kpkts  Jit  Del  Lost   %  Drop  OOO  Kpkts FirstMsg    LastMsg
> IAX2/208.70.77.197:4569-1    7    3   63   410   7     0    1      6    0   40     0   0     0    0      0 Tx:NEW      Rx:ACK    
> 1 active IAX channel
>  
> --
> Tim
> :wq
> 
> 
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