After setting 'net.ipv4.ip_forward = 1' and reloading the 'sysctl' configuration IP forwarding is still disabled

Issue

• Setting net.ipv4.ip_forward = 1 in a configuration file e.g. /etc/sysctl.conf and reloading configuration with sysctl -p does not enable IP forwarding
• net.ipv4.ip_forward is not set to the value specified in /etc/sysctl.conf
• net.ipv4.conf.all.forwarding is not set to the value specified in /etc/sysctl.conf
• net.ipv4.conf.default.forwarding is not set to the value specified in /etc/sysctl.conf