SREcon25 Americas

Steffen Gebert and Miklos Tirpak, emnify


How much is “up to 10 Gbps” for an EC2 instance? And what happens, if packets are smaller or fragmented? Over the years of running our mobile core’s network functions on AWS, we learned – the hard way – about numerous network limits. Many of them are (in the meantime) documented, but some are not.

In this presentation, we share our horror stories on what kept us awake at night. To make you better informed, we will explain limits such as packets per second and connection tracking and how those will affect your network traffic, once they are exceeded. We share, how you can (sometimes) monitor your remaining quotas, or at least how you can identify the reason, why your applications go haywire.

Finally, we highlight a couple of cases, where your next incident could be just a side note in the documentation.


https://www.usenix.org/conference/srecon25americas/presentation/gebert