[cisco-voip] QOS for VoIP with PPPoE questions

[Eric Helm]

I have few questions regarding setting up QOS for voice traffic.

In my scenario, an IOS router has a PPPoE client dialer interface that 
is bound to a physical ethernet interface. When using CBWFQ QOS 
policies, which interface (Dialer or Ethernet) does the service-policy 
need to be applied?
I can't seem to find any good documents on CCO execpt this one,
(http://www.cisco.com/warp/public/105/pppoe_qos_dsl.html) which makes it 
seem like I should put the service-policy on the ethernet interface 
facing the DSL modem, but this example doesn't include a PPPoE client 
dialer interface.

In the same PPPoE client scenario and using RSVP Call Admission Control, 
again, which interface should have the RSVP bandwidth and fair-queue 
parameters?

Can CBWFQ and RSVP CAC be used simultaneously on the same router?
Is this a good idea or bad idea? Which is better to use, if the FXS/FXO 
cards are in the router with the PPPoE client?

Below is an example PPPoE client configuration for reference (without 
any QOS applied):
vpdn enable
!
vpdn-group pppoe
  request-dialin
   protocol pppoe
!
interface FastEthernet0/0
  description to DSL Modem
  no ip address
  no ip unreachables
  ip tcp adjust-mss 1452
  pppoe enable
  pppoe-client dial-pool-number 1
!
interface Dialer1
  description PPPoE Client
  ip address negotiated
  ip mtu 1492
  encapsulation ppp
  ip tcp adjust-mss 1452
  dialer pool 1
  dialer-group 1
  ppp authentication chap callin
  ppp chap hostname username at domain
  ppp chap password custpass
!
dialer-list 1 protocol ip permit

Thanks,
Eric