Also, would it be possible to enable Priority instead of Bandwidth on the Core_Vendor class, and then disable policing?
My thinking is we want the Core_Vendor traffic to have low-latency-queuing, but not be penalized when it exceeds its given bandwidth.
Is there a better way to do that?
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You don't need to shape if your physical port is the same as CDR.
On your branch, it appear you may only need the ToMPLS policy on the serial interface (you don't need the other two policies, you'll still need your pre-classify on the tunnels).
If you don't have them, you may want the following commands on your tunnel interfaces:
ip mtu 1476 !for just GRE
ip tcp adjust-mss 1436 !for just GRE
keepalive 10 3 !optional - takes down tunnel if end-to-end lost - helpful if using snmp