High UDP receive buffer errors since Upgrade to 3.0.x

[Daniel Schröter]

Hello,

we switched from 2.7.16 to 3.0.7 today. We also switched HW.

Since today (after the switch to 3.0.7) we have problems with our sessions (Audio and session stucks).

In netdata we have between 200-400 RcvbufErrors/s. Also in netstat

netstat -s |grep ^Udp: -A 6 | cat
Udp:
   105113171 packets received
   515 packets to unknown port received
   6731595 packet receive errors
   210800531 packets sent
   6731595 receive buffer errors
   2 send buffer errors

This didn't occurs on the old system.

Does someone else have the same problems or do we have an issue with our new HW? We have a "RTL8125 2.5GbE Controller (rev 05)" inside. In our old HW  was "RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)".

With Google/AI I found the suggestions to modify

net.core.rmem_default = 212992
net.core.rmem_max = 212992

Any ideas or some else has the same problem?