This is happening for me on an HP/Compaq ProLiant DL180 G6
$ sudo lshw -businfo -C network
Bus info Device Class Description
===================================================
pci@0000:07:00.0 em1 network 82576 Gigabit Network Connection
pci@0000:07:00.1 em2 network 82576 Gigabit Network Connection
bond0 network Ethernet interface
em2 randomly sometimes appears as "rename3" at boot time.
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https://bugs.launchpad.net/bugs/1284043
Title:
udev renaming the same hardware network i/f to different name, breaks
networking and firewall
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