Don't know if this is the right place for the QoS questions...
I just have general question. If I want to guarantee bandwidth for certain traffic which will appear on all the subinterface, can I limit it on the main interface by placing a policy-map on it?
For example I have f0/0 on a 2800Rtr and I have 3 subinterfaces f0/0.1, .2, .3.
ip access-list ex ACL_traffic
permit ip host x.x.x.x any
match access-group name ACL_traffic
shape average 1500000
service-policy output PMAP
I did try this and the policy-map did work on both f0/0 and subint f0/0.3. However how does it work if I put it on them? If I put it on f0/0, does it averagely allocate 1/3 of bandwidth to each subinterface if they all have matched traffic and does it allocate all bandwidth to f0/0.1 if there is only traffic on f0/0.1 but not other two subinterfaces? Thanks!