QoS on Cisco Routers for Avaya IPT Enviroment

[mesut ozcan]

Dear all,

I need to configure QoS on Cisco routers for support Avaya IP phones voice quality.

IP network of phones are known and 10% of BW will be reserve.

Any suggestion will be greatful.

If possible you can also share config samples.

Best Regards,

Mesut

[Mark Malone]

The 10% would be the layer 3 qos on the wan interface in a service policy with class map matched with an access-list of your voice network/subnet

good examples to follow on this guide just change the bandwidth statements

https://glazenbakje.wordpress.com/2010/12/21/cisco-qos-configuration-simple-example/

regarding layer 2 qos on your switches it depends on what they support mls or autoqos

if mls you just need mls qos trust dscp on your access and layer 2 uplinks or auto qos trust voip

[Dennis Mink]

mark RTP and SIP traffic to amount to 10% of your link, and mark this as ef or af41 then police based on those DSCP markers, voila!