Sysctl error 'net.bridge.bridge-nf-call-ip6tables' is an unknown key.

Solution Verified - Updated -

Issue

  • When executing 'sysctl -p' these errors appear:
error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key  
error: "net.bridge.bridge-nf-call-iptables" is an unknown key  
error: "net.bridge.bridge-nf-call-arptables" is an unknown key

Environment

  • Red Hat Enterprise Linux 6 without bridge module loaded.

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