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This article discusses serialization delay between 4 x 10G (LACP) and 40G link.
Scope
FortiGate.
Solution
Serialization delay refers to the time it takes to push all the bits of a packet onto the network link. It depends on the link bandwidth (speed) and the size of the packet being transmitted. It's calculated using the formula:
Serialization Delay = Packet Size/Link Speed:
Serialization Delay for one 10G link=1,500×8 / 10,000,000,000 =1.2μs
Serialization Delay for 40G link=1,500×8 / 40,000,000,000 =0.3μs
In terms of serialization delay, a 40G link is faster (lower delay) compared to the 4 x 10G links, because the 40G link can transmit more bits per second, reducing the time it takes to serialize each packet.
