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Now that Ubuntu has completed the switch to systemd in 15.04, I want to get rid of /etc/udev/rules.d/70-persistent-net.rules and switch to predictable network interface names (a.k.a. biosdevnames). How could I do this?

Laércio de Sousa
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  • solsTiCe answer is wrong. I tested it just now and it's not working. You don't get predictable network name. You still get eth0, eth1 etc that get reset on each boot even if you set GRUB_CMDLINE_LINUX_DEFAULT="quiet splash net.ifnames=1" and prevent from being generated (sudo ln -s /dev/null /etc/udev/rules.d/75-persistent-net-generator.rules) – Anthony Hunt Jul 05 '15 at 16:41

2 Answers2

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In Ubuntu 15.04'ssystemd, predictable interface names is opt-in by default instead of opt-out. So you have to specify on the kernel command line net.ifnames=1

For example, in grub configuration file, /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash net.ifnames=1"

You wil also have to remove /etc/udev/rules.d/70-persistent-net.rules and to avoid it being regenerated at each boot you need to run

sudo ln -s /dev/null /etc/udev/rules.d/75-persistent-net-generator.rules
solsTiCe
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Using the new names in /etc/network/interfaces seems to be the answer according to this forum post and this documentation bug #1312785

grantbow
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