QoS-Bandwith for VOIP in subinterfaces

[etmarcof]

Hi,

I want to implement QoS for voip in wan links beetween sites.I have 3 sites connected to my Headquarters each link 10M.

In my Headquarters i have the following config in router:

interface FastEthernet0/0

description Connection from service provider

bandwidth 100000

no ip address

service-policy output AVVID

load-interval 30

speed 100

full-duplex

!

interface FastEthernet0/0.84

bandwidth 10000

encapsulation dot1Q 84

ip address XXXXXXXXXXX

traffic-shape rate 10000000 250000 250000 1000

!

interface FastEthernet0/0.85

bandwidth 10000

encapsulation dot1Q 85

ip address XXXXXXXXXX

traffic-shape rate 10000000 250000 250000 1000

!

interface FastEthernet0/0.151

bandwidth 10000

encapsulation dot1Q 151

ip address XXXXXXXXXXXXXXXXXXXXXXX

traffic-shape rate 10000000 250000 250000 1000

My question is in policy-map configuration, for example if i have

class premium

priority 1000

this value is reserved in each sub-interface or in each sub-interface is reserved 1000/3?

Regards.

MC

[dgahm]

The 1000kb priority queue will be used by the physical interface with no regard for the subinterface. So you could have the full 1000kb being used on 1, or 333 on each, but if you exceed 1000kb total, packets will be thrown away. As always with VOIP you need Call Admission Control to ensure you do not exceed your provisioned QOS. If your CAC only allows 333 kb worth of calls per site you will be fine. Or if you want to allow 1000 kb of voice on each link your policy map should be priority 3000.