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Randomblue
Asked: 2013-01-09 08:35:31 +0800 CST

Changing network interface names on RedHat

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I have a DELL server running RedHat EL 6.3 with two 1G network interfaces, and two 10G network interfaces.

Following this note, I have successfully renamed the two 1G network interfaces that used to be called em1 and em2. However, I cannot rename the 10G network interfaces using this method. (Those are called p4p1 and p4p2, and do not start with em.)

How can I rename the network interface name of my 10G network interfaces on RedHat EL 6.3?

redhat

2 Answers

  1. Best Answer

    As the section of the appendix you linked to states, it's strongly recommended to enable or disable the consistent network device naming feature at install time; doing so after installation is messy and not guaranteed to work, as you've discovered.

    To do this, install the system passing biosdevname=0 on the boot command line when booting the installation media, and add the same parameter to the grub boot command line.

    Since you've just installed the system anyway, this shouldn't be too big of a headache...

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  2. I know that my answer is really late, but this can help other people searching for this information, so here it goes:

    It is better to give these 2 options as kernel parameters:

    biosdevname=0 net.ifnames=0

    To add this to the boot you can do:

    /sbin/grubby --update-kernel=`/sbin/grubby --default-kernel` --args="biosdevname=0 net.ifnames=0 "

    Or modify the /etc/default/grub and add biosdevname=0 net.ifnames=0"" to the **GRUB_CMDLINE_LINUX and regenerate grub configuration:

    grub2-mkconfig -o /boot/grub2/grub.cfg

    Example of the /etc/default/grub entry:

    # 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"
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