[c-nsp] QoS for VoIP basics

[Jeremiah Millay]

Check out iperf. Free traffic generation tool. You run it between two 
endpoints. This is a good way to send X Mbps of traffic through a link 
to test your QoS policies.

http://www.noc.ucf.edu/Tools/Iperf/default.htm

>
> Thanks to those who replied to my questions.
>
> Setting the link to full duplex corrected the issue.
>
> However, now voice quality is great no matter whether I enable or disable 
> qos on the switches.
>
> That's more a limitation of my test environment, though, than the qos 
> itself, I think.
>
> What I *really* need is
> -    a good TCP / UDP traffic generator (right now I'm using TCPLoad which 
> is so ancient I don't even know who made it). I'm considering MGEN 
> (http://cs.itd.nrl.navy.mil/products/) but that's UDP only.
> -    a better way to test VoIP quality. I'm simply subjectively gauging call 
> quality by talking through (2) SIP phones which establish peer-to-peer 
> communications after initial call setup via a SIP server. Some free software 
> that provides MOS ratings based on latency, jitter, etc and allows 
> simulation of multiple calls would be ideal. Perhaps I'm dreaming that there 
> could be a free software available for this.
>
> Adam
>
>
>   


-- 
______________________________________________________________
Rock River Internet                            Jeremiah Millay
202 W. State St, 8th Floor              jeremiah at rockriver.net
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