This is confirmed as a systemd-udev regression.
Code that previously existed in rename_netif() to support a temporary
interface name ("rename%u") has been removed. As a result, the '70
-persistent-net.rules' actions that try to shuffle existing names will
now fail.
systemd commit log:
commit 97595710b77aa162ca5e20da57d0a1ed7355eaad
Author: Kay Sievers <k...@vrfy.org>
Date: Thu Jul 5 17:40:50 2012 +0200
udev: network device renaming - immediately give up if the target
name isn't available
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
** Changed in: systemd (Ubuntu)
Status: New => Triaged
** Summary changed:
- Persistent net names via /etc/udev/rules.d/70-persistent-net.rules fail
+ Regression: Persistent net names via
/etc/udev/rules.d/70-persistent-net.rules fail
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https://bugs.launchpad.net/bugs/1235162
Title:
Regression: Persistent net names via /etc/udev/rules.d/70-persistent-
net.rules fail
Status in “linux” package in Ubuntu:
Invalid
Status in “systemd” package in Ubuntu:
Triaged
Bug description:
systemd-udev 204.
Installing 13.10 amd64 on a multi-homed server. There are 5 ethernet
interfaces, one on the mobo and four on a PCIe adapter.
udev created "/etc/udev/rules.d/70-persistent-net.rules" and I later
edited the NAME= assignments to match the device naming required.
These rules are apparently ignored but it transpires that the kernel
is returning -EEXIST from net/core/dev.c::dev_get_valid_name().
This renaming works in earlier versions, specifically on a 12.04 LTS
server with ten Ethernet interfaces, and is therefore a regression.
To manage notifications about this bug go to:
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