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11.9. Disabling Consistent Network Device Naming
To disable consistent network device naming, is only recommended for special scenarios. See Chapter 11, Consistent Network Device Naming and Section 11.10, “Troubleshooting Network Device Naming” for more information.
To disable consistent network device naming, choose from one of the following:
- Disable the assignment of fixed names by "masking" udev's rule file for the default policy. This can be done by creating a symbolic link to
/dev/null
. As a result, unpredictable kernel names will be used. Asroot
, enter the following command:~]#
ln -s /dev/null /etc/udev/rules.d/80-net-name-slot.rules
- Create your own manual naming scheme, for example by naming your interfaces
internet0
,dmz0
orlan0
. To do that, create your own udev rules file and set the NAME property for the devices. Make sure to order the new file above the default policy file, for example by naming it/etc/udev/rules.d/70-my-net-names.rules
. - Alter the default policy file to pick a different naming scheme, for example to name all interfaces after their MAC address by default. As
root
, copy the default policy file as follows:~]#
Edit the file in thecp /usr/lib/udev/rules.d/80-net-name-slot.rules /etc/udev/rules.d/80-net-name-slot.rules
/etc/udev/rules.d/
directory and change the lines as necessary. - Open the
/etc/default/grub
file and find theGRUB_CMDLINE_LINUX
variable.Add bothNote
GRUB_CMDLINE_LINUX
is a variable that includes entries which are added to the kernel command line. It might already contain additional configuration depending on your system settings.net.ifnames=0
andbiosdevname=0
as kernel parameter values to theGRUB_CMDLINE_LINUX
variable:~]# cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="rd.lvm.lv=rhel_7/swap rd.luks.uuid=luks-cc387312-6da6-469a-8e49-b40cd58ad67a crashkernel=auto vconsole.keymap=us vconsole.font=latarcyrheb-sun16 rd.lvm.lv=rhel_7/root rhgb quiet net.ifnames=0 biosdevname=0" GRUB_DISABLE_RECOVERY="true"
Rebuild the/boot/grub2/grub.cfg
file by running thegrub2-mkconfig
command:~]#
grub2-mkconfig -o /boot/grub2/grub.cfg
Note
For systems booted using UEFI:~]#
grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
View the current device name. For example, eno1:~]#
nmcli connection show
NAME UUID TYPE DEVICE Wired 63cba8b2-60f7-4317-bc80-949e800a23cb 802-3-ethernet eno1Modify the device name to enp1s0, and reboot the system:~]# nmcli connection modify Wired connection.interface-name enp1s0
~]# reboot
Thegrubby
utility is used for updating and displaying information about the configuration files for thegrub
boot loader. See thegrubby(8)
man page for more details. For more information about working with GRUB 2, see the Red Hat Enterprise Linux System Administrator's Guide.