Why decreasing UDP traffic for a constant data rate?

Question

I send UDP traffic from/to AWS to/from an external network device (outside AWS). The constant data rate that I configure to send by an application is 1 Mbps. At the starting time, it seems to be sending/receiving this constant data rate. However, suddenly it goes down to less than 1 Mbps (e.g. 600kbps). Why could this be happening?

Answer

Is your application in an EC2 instance?  Network performance has a baseline + burst bandwidth.  You may be exceeding the baseline and eventually running out of burst capacity.  This page provides a bit of transparency though it's a few years old now - https://cloudonaut.io/ec2-network-performance-cheat-sheet/

Answer

I work with an EC2 instance which, particularly, is a t2.xlarge being up to 1 Gbps of network performance. Then I launch an application that generates UDP traffic with a rate of 1Mbps. Then I do not understand why the constant data rate of 1 Mbps reduces to 600kbps when the network performance is up to 1Gbps.

Why decreasing UDP traffic for a constant data rate?

Contenido relevante