I faced the same issue with my Nano PI R2S : even with nightly builds, the r8152 randomly hanged and lan0 disappeared.
I built a minimal armbian buster and revert the driver to previous 1.11 version.
I also manually modified my /etc/udev/rules.d/70-rename-lan.rules with the following content:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="rk_gmac-dwmac", KERNEL=="eth0", NAME="wan0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="r8152", NAME="lan0", RUN+="/usr/sbin/ethtool -K lan0 tx off rx off"
It manages correctly my home fiber with ~600Mbps for DL and ~300Mbps for UL.
Under heavy charge, i didn't experiment lan0 freeze for at least 1h (previously, it froze every 10 minutes).
I guess 2.5Gbps support is lost but:
For people with 1Gbps network, it's enought.
I have serious doubt regarding the ability of R2S to route 2.5Gbps traffic ;-)
For people interested and who do not have time/skill/machine for compilation you can download the image here (~950MB uncompressed) : https://drive.google.com/file/d/1RRvmObBDi58TRTnZN661PL0PYFRbAi0_/view?usp=sharing
binarym got a reaction from lanefu in NanoPi R2S: lan0 goes offline with high traffic