Disable and Enable IPV6 in RHEL
Release:
RedHat Enterprise Linux 5
Problem:
Need to disable the IPV6 in RedHat Enterprise Linux
Solution:
Disable IPV6 in RHEL:
1) Add the below line in the modprobe.conf file
# vi /etc/modprobe.conf
alias net-pf-10 off
alias ipv6 off # Add this for RHEL before 5.4
options ipv6 disable=1 # Add this for 5.4 and later
Note : If any entry available like “alias net-pf-10 ipv6”, delete that entry.
2) Also add the below entry in the network file to prevent error
# vi /etc/sysconfig/network
NETWORKING_IPV6=no
3) Reboot the server to disable the IPV6
# shutdown -r now
Enable IPV6 in RHEL:
4) Add the below entry in the modprobe.conf file
# vi /etc/modprobe.conf
alias net-pf-10 ipv6
Note : Remove if any entry like “alias net-pf-10 off or alias ipv6 off or options ipv6 disable=1” in the modprobe.conf file.
5) Change the “ NETWORKING_IPV6” parameter value to yes in the netwok file.
# vi /etc/sysconfig/network
NETWORKING_IPV6=yes
6) Restart the server to enable the IPV6 support
# shutdown -r now
