I have set buffers to 20MB per core and results are great:  
# sysctl -w net.core.rmem_default=20971520

0% packet lost... with default value of 200KB packet-loss went easily above 30%
You can chek if you have this problem with:
# netstat -suna
look for errors in UDP area

----------Pedteter.


    On Tuesday, March 2, 2021, 04:44:35 PM GMT+1, Benny Pedersen <m...@junc.eu> 
wrote:  
 >On 2021-03-02 16:26, Pedro David Marco wrote:> Correct Kernel UD tunning 
 >solves the problem!>in verbose this is ?
  

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