One of the key features of Aruba 8320 is the performance "2.5Tbps with 1.905MPPS", what Tbps used for and what MPPS used for?
Tbps - Tera Bits Per Second which means Million megabit per second, this rating measures the maximum bandwidth can pass through the switch across all ports. While MPPS - Mega Packet Per Second where mega stand for Million, this rating measures how many million packets (minimum packet size) the switch able to process per second.
In general, every 1 Gbps Ethernet requires 1.488 Mpps and the math behind it:
1Gbps = 1,000,000,000bps/8bit = 125,000,000
125,000,000 / (64+8 +12) = 1,488Mpps
64 bytes per packet as the standard average packet size and 8 bytes for the header. The 12 bytes are for the frame interval.
Please note the PPS value is variable and depend on the packet size here we assumed the packet size is 84 bytes in total.
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