Can anyone please be so kind as to explain the best way of applying QoS on Cisco 877 router? I am really confused to which interface to apply the policy-map, Dialer, atm0 or atm PVC interface level. Some resources say to apply it on both Dialer and ATM but when I test it with VoIP after showing policy-map on both Dialer and ATM interfaces for instance Voice packets queue on one interface and signalling on a different one.
Please anyone help how to apply QoS in this scenario and best way for verifying it. Please ask for more details should you need to.