configured with Gigabit ethernet 0/1 as the WAN interface. The configs are as follows:
class-map match-any Multimedia
match ip dscp ef
class-map match-any Interactive
match ip dscp cs3
match ip dscp af31
match ip dscp af32
match ip dscp af33
class-map match-any MissionCritical
match ip dscp cs4
match ip dscp af41
match ip dscp af42
match ip dscp af43
set dscp default
shape average 16384000
ip address 192.168.93.14 255.255.255.252
ip nbar protocol-discovery
no cdp enable
service-policy output PrimaryQOSOUT
Will the configuration suffice for QoS or since i'm having gigabit ethernet as my WAN interface, I will need to tweak the transmit ring setting to ensure QoS kicks in. I thought the QoS will kick in once the traffic reaches 70% of 16Mb.
Your configuration looks good and should work. You should not need to change your hardware queue as when you configure the service-policy on the interface the router automatically shortens it. You can check with the command below
QoS kicks in as soon as the hardware queue is full. At other times with no congestion QoS doesn't do anything as it doesn't need to.
Only other thing I would like to mention is that you haven't given your class-default a bandwidth setting. This means that your class-default won't get the rest of the bandwidth, instead the un-allocated bandwidth will be shared amoungst the other queues. So, one might think that the class-default might get 4MB but you'll find that bandwidth will be shared out so the class-default in times of congestion might only get 1MB.
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