In LPM mode, the specified lookup rate is supported. The lookup rate
is not impacted by if the lookup key matches multiple entries or not. However, the
RAM_FREQ needs to be set 20% higher than the LOOKUP_RATE. The LOOKUP_INTERFACE_FREQ must be equal to the LOOKUP_RATE. A too low or too high LOOKUP_INTERFACE_FREQ value has negative impact on the lookup
performance.
No management requests are served until the Lookup Request FIFO is cleared. ECC scrubbing takes place only when both the Lookup Request FIFO and the Management Request FIFO are emptied. The management request rate value in such cases is more than or equal to the following value:
Management Request Rate = RAM_FREQ -
1.2*LOOKUP_RATE*TDM_FACTOR