we've seen this recurring with both broadcom and intel cards where udev persistent rules would write the same entry for a NIC twice thus making it appear as ethN with N > 0 and in turn making the install fail. still unknown if it is udev or installer etc
e.g. on restbase1002
# cat /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# PCI device 0x14e4:0x168e (bnx2x)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="8c:dc:d4:00:11:7c", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
# PCI device 0x14e4:0x168e (bnx2x)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="8c:dc:d4:00:11:78", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x14e4:0x168e (bnx2x)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="8c:dc:d4:00:11:78", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"
# PCI device 0x14e4:0x168e (bnx2x)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="8c:dc:d4:00:11:7c", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"
~ #