NB! It seems this console command is not compatible with CS2.
Command Profile

NET_SHOWUDP_OOB

CS:GO

This command, if set to 1 (default 0), will enable the printing of information about OOB UDP packets to the console.

Syntax
net_showudp_oob [0 / 1]

Description

This command, if set to 1 (default 0), will enable the printing of information about OOB UDP packets to the console.

Syntax And Arguments

net_showudp_oob [0 / 1]
0 / 1 Enter 0 to disable (default). Enter 1 to enable debug printing.