[Bug 1090002] Re: biosdevname gives name of device as rename7 in Quantal

[Stéphane Graber]

Ok, so I've been doing a big of debugging with the help of Narinder.

One thing that I found really quite odd is that the BIOS name to MAC address mapping isn't static as you'd think.
Instead it appears to change several during the boot sequence.

The list below shows the BIOS name on the left and the MAC address on
the right. This was generated by calling biosdevname -d every time an
interface appeared:

em1 => 00:17:A4:77:3C:00

em2 => 00:17:A4:77:3C:02
em2 => 00:17:A4:77:3C:08

em3 => 00:17:A4:77:3C:08
em3 => 00:17:A4:77:3C:0A

em4 => 00:17:A4:77:3C:0A
em4 => B4:99:BA:A6:B9:18
em4 => B4:99:BA:A6:B9:19
em4 => B4:99:BA:A6:B9:1D

em5 => 00:17:A4:77:3C:0C
em5 => B4:99:BA:A6:B9:18
em5 => B4:99:BA:A6:B9:19
em5 => B4:99:BA:A6:B9:1C
em5 => B4:99:BA:A6:B9:1D

em6 => 00:17:A4:77:3C:06
em6 => B4:99:BA:A6:B9:19
em6 => B4:99:BA:A6:B9:1C
em6 => B4:99:BA:A6:B9:1D
em6 => B4:99:BA:A6:B9:20
em6 => B4:99:BA:A6:B9:24

em7 => 00:17:A4:77:3C:06
em7 => 00:17:A4:77:3C:0C
em7 => B4:99:BA:A6:B9:19
em7 => B4:99:BA:A6:B9:1D
em7 => B4:99:BA:A6:B9:24
em7 => B4:99:BA:A6:B9:25

em8 => 00:17:A4:77:3C:04
em8 => 00:17:A4:77:3C:0C
em8 => B4:99:BA:A6:B9:1D
em8 => B4:99:BA:A6:B9:20

em9 => 00:17:A4:77:3C:04
em9 => 00:17:A4:77:3C:06
em9 => B4:99:BA:A6:B9:20
em9 => B4:99:BA:A6:B9:24

em10 => 00:17:A4:77:3C:06
em10 => 00:17:A4:77:3C:0C
em10 => B4:99:BA:A6:B9:24
em10 => B4:99:BA:A6:B9:25

em11 => 00:17:A4:77:3C:0C
em11 => 00:17:A4:77:3C:0E
em11 => B4:99:BA:A6:B9:25

em12 => 00:17:A4:77:3C:0E
em12 => B4:99:BA:A6:B9:20

em13 => B4:99:BA:A6:B9:20
em13 => B4:99:BA:A6:B9:21
em13 => B4:99:BA:A6:B9:24

em14 => B4:99:BA:A6:B9:21
em14 => B4:99:BA:A6:B9:24
em14 => B4:99:BA:A6:B9:25

em15 => B4:99:BA:A6:B9:21
em15 => B4:99:BA:A6:B9:25

em16 => B4:99:BA:A6:B9:25

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to udev in Ubuntu.
https://bugs.launchpad.net/bugs/1090002

Title:
  biosdevname gives name of device as rename7 in Quantal

Status in “linux” package in Ubuntu:
  Confirmed
Status in “udev” package in Ubuntu:
  New
Status in “linux” source package in Quantal:
  New
Status in “udev” source package in Quantal:
  New
Status in “linux” source package in Raring:
  Confirmed
Status in “udev” source package in Raring:
  New

Bug description:
  In Quantal kernel biosdevname feature is not working as it suppose to
  be. On hardware we are seeing an issue where few of the network
  interface names are named as rename7 etc.. while biosdevname -d
  utility provides the correct biosname while kernel name have been
  messed up. There are total 16 network interfaces on the server which
  are ALOMs for Emulex card connected to system.

  It seems this issue is a race condition and will get fixed in Fedora
  18. But having fix in Quantal will help also.

  https://bugzilla.redhat.com/show_bug.cgi?id=782145

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1090002/+subscriptions