Why tcp_thin_dupack kernel tunable is not available ?

Solution Verified - Updated -


  • When enabling tcp_thin_dupack, sysctl emits error :
# sysctl -w net.ipv4.tcp_thin_dupack=1
sysctl: cannot stat /proc/sys/net/ipv4/tcp_thin_dupack: No such file or directory


  • Red Hat Enterprise Linux 8 and above.

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