Re: [LARTC] VOIP Challenges...

[Ed Wildgoose <lists@wildgooses.com>]

>My calls are only choppy on the outbound side, ostensibly because of the
>bandwidth disparity--I have 3Mb down, but only 256Kb up.  When I'm not
>sending anything out, I'm good.  When I load up the outbound however, I not
>only lose the ability to start a *new* ssh connection to my Linux box
>(Xeon), but all interactivity is destroyed (DNS lookups, etc) and my Vonage
>calls are worthless (though I can still hear the caller perfectly).
>
>I'm not discounting the possibility that my MARKs are getting stripped or
>otherwise re-mangled (so to say) in my excessively complex iptables script.
>Up until this attempt at learning QoS, I've never had a need for MARKs, so
>I'm going to sit down and work through my script on that end of things too.
>  
>

Debug this first.  It's not hard to sit and watch the byte counters 
scroll up.  If any traffic goes to queues that you don't expect then you 
know something is wrong.

By the way, your other errors indicate that you don't have the correct 
kernel modules loaded....

As I said though, my softphone on the PC kept going stuttery on the 
uplink even though QOS was working. (And only the uplink, downlink was 
perfect).  With the hardware phone it's perfect even when the link is 
under stress.  I'm not sure exactly why, but I did notice that after a 
few mins the softphone usually got it's act together so I suspect it's a 
default delay thing which needs to get settled down to the level of 
jitter on the line....

Ed W
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