As we are talking abour being upgraded to 100mbit I am assuming you are currently on 50mbit with the vmng300. Go to
http://192.168.100.1 and click on Operation Config and it should look something like this
Primary Downstream Service Flow
SFID : 900
Max Traffic Rate : 110000000 bps
Max Traffic Burst : 10000 bytes
Min Traffic Rate : 0 bps
Primary Upstream Service Flow
SFID : 899
Max Traffic Rate : 10250000 bps
Max Traffic Burst : 16320 bytes
Min Traffic Rate : 0 bps
Max Concatenated Burst : 16320 bytes
Scheduling Type : Best Effort
apart from yours will be about half that for the 50mbit config