Public bug reported:

Binary package hint: udev

Server equiped with two ethernet interface cards:
Nic1: 52:54:00:45:cf:85
Nic2: 52:54:00:45:cf:86

/etc/udev/rules.d/70-persistent-net.rules:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", 
ATTR{address}="52:54:00:45:cf:85", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", 
ATTR{address}="52:54:00:45:cf:86", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

ifconfig -a:
eth1      Link encap:Ethernet  HWaddr 52:54:00:45:cf:86  
          inet addr:172.16.28.64  Bcast:172.16.28.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fe45:cf86/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:94 errors:0 dropped:0 overruns:0 frame:0
          TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11120 (11.1 KB)  TX bytes:11446 (11.4 KB)

eth0_rename Link encap:Ethernet  HWaddr 52:54:00:45:cf:85  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

upps!! Shouldn't happen!! Looks a lot like udev does not correctly parse
ATTR{address}="xx:xx:xx:xx:xx:xx", matching addresses as equal if they
only differ in the last nibble??

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: udev 151-12.3
ProcVersionSignature: Ubuntu 2.6.32-27.49-server 2.6.32.26+drm33.12
Uname: Linux 2.6.32-27-server x86_64
Architecture: amd64
Date: Thu Dec 30 21:30:47 2010
InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release amd64 
(20100816.2)
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: Bochs Bochs
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-27-server 
root=/dev/mapper/hostname-root ro quiet
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: udev
dmi.bios.date: 01/01/2007
dmi.bios.vendor: Bochs
dmi.bios.version: Bochs
dmi.chassis.type: 1
dmi.chassis.vendor: Bochs
dmi.modalias: 
dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
dmi.product.name: Bochs
dmi.sys.vendor: Bochs

** Affects: udev (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

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https://bugs.launchpad.net/bugs/695814

Title:
  udevd does not assign device correctly if mac differs only by one

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