/etc/network/interfaces:

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# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

iface eth12 inet dhcp

auto eth12
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/etc/udev/rules.d/70-persistent-net.rules não existe, porem existe o
/etc/udev/rules.d/z25_persistent-net.rules:

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# This file was automatically generated by the /lib/udev/write_net_rules
# program, probably run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single line.
# MAC addresses must be written in lowercase.

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:fa:76:a2",
NAME="eth0"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:6f:a1:c9",
NAME="eth1"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:00:8b:c2",
NAME="eth2"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:80:c8:cd",
NAME="eth3"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:70:be:40",
NAME="eth4"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:9f:6b:f1",
NAME="eth5"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:f5:07:54",
NAME="eth6"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:c9:95:1c",
NAME="eth7"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:ba:63:4b",
NAME="eth8"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:53:5d:c7",
NAME="eth9"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:f1:d3:19",
NAME="eth10"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:ac:6b:1c",
NAME="eth11"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:51:c9:57",
NAME="eth12"

# PCI device 0x10de:0x03ef (forcedeth)
SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:00:6c:f4:06:8a",
NAME="eth13"
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Responder a