How to enable IP forwarding /Routing in RHEL/CentOS Linux machine

By default, in linux machine routing /IP forwarding become disable.  We enable IP Forwarding  for making linux machine as router .

# vim /etc/sysctl.conf

net.ipv4.ip_forward=0

change to

net.ipv4.ip_forward=1

Uupdate command

#sysctl -p