traffic shaping on router port

[Bekzod Fakhriddinov]

Hi

There is router A and subinterfaces gi0/0/1.10 for internet access,  gi0/0/1.20 for office data, voip, media.   An interface 0/0/1 has traffic shaping on it. f.e till 10MB  

Questions:

1  If I apply qos on that int .20 should i calculate priority/bandwith for services from that 10MB ? 

2  I'd like to leave some bandwith for internet which will go trough gi0/0/1.10 but if its not used can that bandwith utilized by voip, media (which run trough gi0/0/1.20) ? 

3 Also is a difference between applying parent-child policy (with shaping and qos queuing ) under interface or subinterface ? 

Thank you 

[balaji.bandi]

if i understand the question correctly yes if the overall bandwidth is 10MB, then the you have total bucket size of 10MB bandwidth, so it will be sliced from that bandwidth.

here is example if you not got example guide for reference :

https://www.cisco.com/c/en/us/td/docs/ios/12_2/qos/configuration/guide/fqos_c/qcfmcli2.html#wp1022062