[asterisk-users] Setting QOS settings in asterisk and/or CentOS?

Nick Hoffman nick.hoffman at voxpak.com
Fri Sep 22 18:53:11 MST 2006

On Sat September 23 2006 06:14, Bob Amen <amen at oreilly.com> wrote:
> which sets the TOS bit on all IAX, SIP and RTP packets. Using iptables
> means that we can set up our rules on the router without using ACLs. Our
> Cisco Cookbook (http://www.oreilly.com/catalog/ciscockbk/) has a nice
> section on QoS (Chapter 11) and an appendix on TOS, etc. The author
> advises not to use ACLs when possible as they take more CPU in the
> router to implement and on a heavily loaded router can cause packet
> delays. So here's what our config looks like:
> Cheers,
> Bob

Hi Bob. I'm new to TOS and DSCP, but after going over your and Rich 
Adamson's responses to Steve BerkHolz's question, I read up about them.

With what you wrote above, does this mean that your Cisco router(s) deny, 
allow, and route traffic based on TOS/DSCP flags, and you don't bother 
with traditional ACL rules like below?:
    access-list 123 permit udp ...

-- Nick
e: nick.hoffman at voxpak.com
p: +61 7 5591 3588
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