Network Bandwidth Settings - How to allow 15mbps?

How can I adjust the config files so that my dedicated server can support up to 1mbps for each connected client for a total of 15mbps (15 clients)? I’ve been struggling with this issue for a long time. It seems setting these values too high seems to make my game a bit stuttery and laggy. Below is my attempt but I feel it’s incorrect. Any help would be greatly appreciated!

This is what I had for DefaultEngine.ini and DefaultGame.ini

[/Script/Engine.GameNetworkManager]
TotalNetBandwidth=15000000
MaxDynamicBandwidth=1000000
MinDynamicBandwidth=1000000

[/Script/OnlineSubsystemUtils.IpNetDriver]
MaxClientRate=1000000
MaxInternetClientRate=1000000

[/Script/Engine.Player]
ConfiguredInternetSpeed=1000000
ConfiguredLanSpeed=1000000