Defines the traffic priority for transmitting Non Frame Relay
or SMDS traffic on this port.
CNGC_IPPRIORITY_TWO - Default Value
Set all non FR or SMDS user traffic packets to priority 2.
CNGC_IPPRIORITY_ONE - Set all non FR or SMDS packets to priority 1.
CNGC_IPPRIORITY_TWO - Set all non FR or SMDS packets to priority 2.
CNGC_IPPRIORITY_THREE - Set all non FR or SMDS packets to priority 3.