The backplane bandwidth of the switch is also called the backplane capacity, which is the maximum amount of data that can be handled by the switch interface processor or interface card and data bus. The backplane bandwidth indicates the total data exchange capacity of the switch in Gbps, and the higher the backplane bandwidth of a switch, the stronger the ability to process the data.

Backplane bandwidth calculation method:

Backplane Bandwidth = Number of Ports * Port Speed ​​* 2

If the total bandwidth ≤ nominal backplane bandwidth, then the backplane bandwidth is wire-speed, non-blocking.

2, packet forwarding rate:

Packet forwarding rate, also known as port throughput, refers to the router in a port packet forwarding capacity, the unit is usually used pps (packet per second) to measure.

Packet forwarding rate calculation method:

Packet forwarding rate = full configuration Gigabit port × 1.488Mpps + full configuration 100M port number × 0.1488Mpps

(1 gigabit port has a theoretical throughput of 1.488 Mpps at a packet length of 64 bytes and a theoretical throughput of 0.1488 Mpps at a packet length of 64 bytes)

The whole machine forwarding rate ≤ nominal packet forwarding rate, then the exchange of equipment in the whole machine is a wire-speed forwarding, non-blocking