[Bug 267575] rtwn(4): Network goes down on git clones over ssh

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267575

--- Comment #3 from Roman Bogorodskiy <novel@FreeBSD.org> ---
(In reply to Kubilay Kocak from comment #2)

I've checked man rtwn(4) and don't see any knobs to enable additional
debugging.
Though I see there's a number of sysctls that I guess could be useful to share:

dev.rtwn.0.radar_detection: 0
dev.rtwn.0.rx_buf_size: 24
dev.rtwn.0.ratectl_selected: 1
dev.rtwn.0.ratectl: 1
dev.rtwn.0.hwcrypto: 1
dev.rtwn.0.debug: 0
dev.rtwn.0.ht40: 0
dev.rtwn.0.%parent: uhub0
dev.rtwn.0.%pnpinfo: vendor=0x0846 product=0x9052 devclass=0x00
devsubclass=0x00 devproto=0x00 sernum="00e04c000001" release=0x0200 mode=host
intclass=0xff intsubclass=0xff intprotocol=0xff
dev.rtwn.0.%location: bus=0 hubaddr=1 port=6 devaddr=2 interface=0 ugen=ugen0.2
dev.rtwn.0.%driver: rtwn
dev.rtwn.0.%desc: 802.11ac WLAN Adapter 
dev.rtwn.%parent:

Some of them are tunable, but not sure if it makes sense trying to change any
of them.

Some more observations:

 - Connection goes down even with git clone over https, but it happens few
minutes later, not right away
 - Connection speed is very low: running speedtest on this box gives 35 Mbps
download and 33 Mbps upload. My mobile phone connected to the same network
gives  426 Mbps downlaod and 40 Mbps upload.

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