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QOS Best Approach for IPSec/GRE with dedicated WAN Core Router & VPN Router

QOS Best Approach in Head Office

I am planning to implemenet QOS in our Head Office using MQC.

I am confused on where to implement classification,tagging,queuing, or policing, etc (is it on WAN Core Router or VPN Router).  Because we've got four MPLS Service Provider. I had two dedicated WAN Aggregator Switch, Two WAN Core Router (L3 for All MPLS Links), Two VPN Router ( GRE & IPSEC is here) in Head Office.

Note

1.WAN Aggregator Switch - connected via stackcable "All Link from Telco goes here"

2.WAN Core Router = Act as L3 for all MPLS Links (Router-on-a-stick)

     Note: All L3 for Service Provider curcuit is setup here

3.VPN Router = All IPSec & GRE is configure here

4.Branches/Offices are interconnected using IPSec transport mode with Ecnrypted GRE Tunnel

5.I also attached the diagram for your perusal.

Hope to hear comments from you soon.

Regards,

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