Discussion on low level data flow and home networks. Found solution to allow 4MB max chunk size as smooth as 1/2 MB - its a setting in QUIC

[Toivo]

By the way, here are the defaults for Rust LibP2P and defaults of Quinn:

Rust LibP2P		Quinn
max_concurrent_stream_limit	256 pcs	MAX_STREAMS_BIDI	100 pcs
		MAX_STREAMS_UNI	100 pcs
max_connection_data	15 MB	receive_window	Unbounded
max_stream_data	10 MB	stream_receive_window	1.25MB

Neither seems to consider initial_max_data or initial_max_stream_data which are available settings in QUIC.

Sources:

Summary

rust-libp2p/transports/quic/src/config.rs at master · libp2p/rust-libp2p · GitHub

transport.rs - source

RFC 9000: QUIC: A UDP-Based Multiplexed and Secure Transport