Applies to:
Linux OS - Version Oracle Linux 7.0 and later
Information in this document applies to any platform.
Goal
On Oracle Linux 7, a new naming scheme is introduced, check details.
For instance:
# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 6c:0b:84:6c:48:1c brd ff:ff:ff:ff:ff:ff
inet 10.10.10.11/24 brd 10.10.10.255 scope global eno1
inet6 2606:b400:c00:48:6e0b:84ff:fe6c:481c/128 scope global dynamic
valid_lft 2326384sec preferred_lft 339184sec
inet6 fe80::6e0b:84ff:fe6c:481c/64 scope link
valid_lft forever preferred_lft forever
This document describes how to revert to legacy naming scheme with Network Interface names as eth0, eth1, etc.
Solution
1. Edit kernel boot parameter.
Edit file /etc/default/grub and append net.ifnames=0 to line GRUB_CMDLINE_LINUX, for instance:
GRUB_CMDLINE_LINUX=" crashkernel=auto net.ifnames=0 rhgb quiet"
Regenerate a GRUB configuration file and overwrite existing one:
# grub2-mkconfig -o /boot/grub2/grub.cfg
2. Edit udev network rule.
Edit file /etc/udev/rules.d/70-persistent-net.rules (create file if not exist) with below line:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}==" 6c:0b:84:6c:48:1c", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
3. Correct ifcfg file configuration:
Edit NAME and DEVICE parameters in ifcfg file to new Network Interface name.
# cat /etc/sysconfig/network-scripts/ifcfg-eno1
(snip)
NAME=eth0
(snip)
DEVICE=eth0
(snip)
Edit ifcfg file name:
# mv /etc/sysconfig/network-scripts/ifcfg-eno1 /etc/sysconfig/network-scripts/ifcfg-eth0
4. Disable NetworkManager
# systemctl disable NetworkManager
5. Reboot system.
