[Asterisk-Users] QoS in asterisk

[Dr. Rich Murphey]

At Astricon, I plan to cover QoS on FreeBSD using the pf 
firewall's class based queuing.  This includes implementing 
classes to prioritize each of RTP, IAX, SIP, FTP, and others.
Within each class packets can be prioritized based on whether 
TOS is set.

I'm wondering whether this should be a tutorial rather than
a talk.  Anyone have presences?

Cheers,
Rich

> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> Rich Adamson
> Sent: Sunday, July 11, 2004 3:06 PM
> To: asterisk-users at lists.digium.com
> Subject: Re: [Asterisk-Users] QoS in asterisk
> 
> > Does asterisk provide quality of service(QoS)? If it does, how do I 
> > use it? The reason why I ask is that I need to switch to use POTS 
> > should the internet connection becomes poor?
> 
> Asterisk 'participates' in the qos process by allowing you to 
> set TOS bits in the IP header. For example:
> In sip.conf
>  tos=0x18    ;sets ip tos bits lowdelay & throughput
> In iax.conf
>  tos=lowdelay 
> 
> However, its up to your infrastructure equipment (eg, routers 
> & switches) to prioritize packets received, and send those on 
> to the next hop following the objectives that you program 
> into those devices. Not all devices support qos however.
> 
> When using Internet connections, you can control qos for 
> packets leaving your site, however you normally can't control 
> how your ISP (and their
> providers) handle it (if at all) for incoming packets. Some 
> ISPs are actually doing some qos, but most are not.
> 
> There is no logic built into asterisk that would support a 
> decision making process of chosing one path verses another 
> based on past quality, etc.
> 
> Rich
> 
> 
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