qos + pcc on different bandwith interfaces

RouterOS Beginner Basics
1

Good day.
There are several posts on forum about qos + pcc but i didn’t find an answer.
My question is how to deal with qos on several interfaces (1 LAN and 2,3,… WAN). I am buiding first config.

  1. I think that i can’t use global-xxx virtual interfaces for queues because of different bandwith. So i would marking in mangle forward/postrouting and use queue for each WAN.
  2. There is another difficulty with queue on LAN that aggregates output from both WAN. I could set total of WAN ingress-bandwith for max-limit of LAN queue, but max-limit will be broken on WAN failure?

Did someone faced this problem? How do you run with several isp and qos especially when interfaces have different bandwith?

2

got an simple idea. I should divide parent queue that has max-limit = total of wan to child queues. This way i can max-limit them by corresponding interface bandwith. And even use global-xxx virtual interfaces with such childs. That’s right? Go for tests…