[asterisk-users] Best QoS for Linux

[John A. Sullivan III]

On Thu, 2009-10-08 at 16:07 -0400, Michelle Dupuis wrote:
> More specifically....I'm looking for a Linux package to allow shaping,
> QoS, prioritization by port, etc.
<snip>
> 
> 
> Spinning off from another topic...what are people using for QoS /
> Shaping?
>  
> I'm using Wondershaper script with OK results...but I'd like better.
> Ideas?
> _<snip>
I would imagine that tc, iproute2, and iptables are your friends.  In
our case, we try to keep things as simple as possible in a fairly
complex environment.  Thus, whenever we can, we try to set our DSCP/ToS
bits in a way that will be handled properly by the default Linux
queueing mechanism.

I'm afraid I'm up to my eyeballs in a project right now but I have
posted some of our work in earlier posts on this mailing list.  In the
case of Asterisk, we use b0 instead of b8 (expedited forwarding) for RTP
traffic because it works better with the default pfifo_fast packet
scheduler.  We've also ensured the packet handling is consistent from
end to end as much as possible.  Even though we are using the Internet
as a transport medium, we're very happy so far with the quality of the
calls.  See the previous posts for more details.  Hope this helps - John
-- 
John A. Sullivan III
Open Source Development Corporation
+1 207-985-7880
jsullivan at opensourcedevel.com

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