On Wednesday 20 December 2006 7:14 am, Kristian Kielhofner wrote: <snip good stuff>
> As far as traffic shaping goes in general... Yes, to do effective > traffic shaping with VoIP services on "standard" internet connections, > you really should limit the overall transfer capacity to about %90 of > what is capable on the link. > > Just like Darren described, if you don't artificially limit the > speed of the link your ISP will, and their send queues are not tuned like > yours are... So, if you run at %100, and they start queuing, they are > going to use whatever algorithm that they have (probably a simple FIFO with > a buffer) to schedule outgoing packets. This isn't what you want! Limiting > the speed of the link prevents this queuing and will give you a better > experience for VoIP (and any other service that uses large amounts of > relatively small packets - gaming for instance). I second the notion. I haven't used any traffic shaping on my little boards, but I've used Wonder Shaper a lot on old PC firewalls for DSL connections. Even though you're throttling down to 90%, you'll experience faster downloads and better performance because of less queueing. It seems paradoxical, but the queueing is what hurts, so minimizing that makes a noticeable difference. Thanks Kristian for the explanation of kernel timing, I think I'm finally starting to get it. That's something that always seems to be lurking in wait, just waiting for a worst moment to leap out and make a mess of something. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Carla Schroder Linux geek and random computer tamer check out my Linux Cookbook! http://www.oreilly.com/catalog/linuxckbk/ best book for sysadmins and power users ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _______________________________________________ Astlinux-users mailing list Astlinux-users@lists.kriscompanies.com http://lists.kriscompanies.com/mailman/listinfo/astlinux-users Donations to support AstLinux are graciously accepted via PayPal to [EMAIL PROTECTED]