How to configure QoS on Cisco?

Question

Computer networks

Prompt how to configure QoS correctly. We have the following scheme

The problem is as follows, if branch3 starts loading the channel to the main office, then the data from the server 192.168.2.10 comes with a delay, which is not acceptable.
Everywhere eigrp routing. I understand that on the router in branch 3 you need to do this:
class-map match-all TM
match access-group 160
match precedence 4
policy-map TM
class TM
priority 2000
policy-map Filial3
class class-default
shape average 10000000
service-policy TM
To the interface that looks towards the main office
interface FastEthernet1/0.100
description link to General office
bandwitch 10000
encapsulation dot1Q 100
ip address 192.168.100.2 255.255.255.252
service-policy output Filial3
extended IP access list 160
10 permit ip host 192.168.2.10 any

Answer 1

In your example, you give a guaranteed speed of 2000 kbps out of 10 Mb to your server if the traffic goes from the server to the main office, but you do not affect the traffic from the main office to the server, i.e. if someone downloads something in 10 mb, then you will have problems. Priority will only help you with outgoing traffic.
How do you access the Internet? Do you have your own white grid? Several dedicated white IPs? Or do you have one white IP + nat? Or maybe you have a dedicated line to your branches?