Instead of using the MAC to do ratelimting we use
the Frame Engine, this has the the benefit of being
a more universal solution and will work with PON
without the need of implement APIs for using the
MAC to do ingress ratelimiting.
This also works fine when the integrated switch
is used as the wan.
When doing classification on DSCP values we need
to ensure that the values are correctly hashed
for the L3 HW NAT, otherwise identical flows
with different DSCP values will end up with
the same QoS priority and queue.
The L3 HW NAT will match the flows based on an IP header 5-tuple.
However if we are doing classification based on p-bits at the
same time and we want to use this for QoS we need to make sure
to add a VIP packet matcher to send this info to the PPE for
hashing the flow.
