There are a couple of settings that you can set on the EOSCoreNetDriver to fine-tune your connection settings.
DefaultEngine.ini (pre v1.8.0)
[/Script/OnlineSubsystemEOSCore.EOSNetDriver]
NetConnectionClassName="OnlineSubsystemEOSCore.EOSNetConnection"
MaxNetTickRate=60
NetServerMaxTickRate=60
LanServerMaxTickRate=60
NetClientTicksPerSecond=60
bClampListenServerTickRates=true
MaxClientRate=100000
MaxInternetClientRate=100000
DefaultEngine.ini (v1.8.0+)
[/Script/OnlineSubsystemEOS.NetDriverEOS]
NetConnectionClassName="OnlineSubsystemEOS.NetConnectionEOS"
MaxNetTickRate=60
NetServerMaxTickRate=60
LanServerMaxTickRate=60
NetClientTicksPerSecond=60
bClampListenServerTickRates=true
MaxClientRate=100000
MaxInternetClientRate=100000
These settings will limit at what rates client and server talk to each other, because of very high framerates (FPS) sometimes the client will hammer the server with data, too much data that it will eventually get dropped.
The settings above will limit the send rate to “60 FPS” rather than spamming the server at the games FPS (100-200++ frames per second)