[asterisk-users] Asterisk and QoS

[William Kenworthy]

For ingress - yes, but not quite correct. No you cant directly control
the QoS on someone elses interface, but you can do something none the
less.
There is a queue on the interface facing you (and if an ISP is quite
likely been made very large) - then when you get a lot of packets coming
in such as when you have an ftp session going it will queue everything.
The trick is to force the other end to keep a minimal queue buffer by
using a "police" filter.  It drops packets to keep the buffer to a small
size thus helping latency and minimising the effects a large buffer has
on your traffic.  The queue is to help the other end manage their flows
- not yours! - so policing helps you!

Tricky, but it appears to work.

BillK



On Fri, 2010-07-30 at 12:29 -0600, Tim Densmore wrote:
> There's no real way of shaping or applying QoS on inbound interfaces
> on any device.  You can affect how that traffic behaves once it's
> entered your device, but not how it's queued on its way to that
> device.  Think of lit like trying to stanch the flow of water at the
> end of a hose rather than simply turning the pressure down at the
> spigot.  To properly queue, it has to be done on egress, so you'd be
> better off looking at applying QoS to whatever moves traffic to your
> astersk box if "input" traffic on the asterisk box is the issue.  You
> can, of course, effectively setup queuing outbound return traffic
> *from* the asterisk box.
>