Mailinglist Archive: opensuse-features (401 mails)

[fate_noreply@xxxxxxx]

Feature changed by: Per Jessen (pjessen)
Feature #310896, revision 9
  Title: Consistent Network device naming-Name network interfaces to
  match chassis labels
   
  openSUSE-11.4: New
  Priority
      Requester: Important
   
  Requested by: Narendra K - (narendra_k)
  Partner organization: openSUSE.org
   
Description:
  On a Dell PowerEdge server with multiple add-in cards, the naming of
  the network interfaces is non-deterministic. This results in 'eth0' not
  mapping to "Embedded NIC 1" as labelled on the server chassis. This
  issue is seen on Dell PowerEdge 10G above. This feature addresses this
  issue by renaming network interfaces based on the following policy as
  discussed in the Linux Plumbers Conference -
  http://marc.info/?l=linux-hotplug&m=128892593821639&w=2
  Embedded devices: em<port> (em => ethernet-on-motherboard)
  Add-in PCI cards: pci<slot>#<port>_<virtual function instance>
  On a PER710 with 4 Lan-On-Motherboard interfaces and a dual port add-in
  network controller, the interface names would look like -
  Onboard interfaces - em1  em2  em3  em4
  Interface names for the dual port add-in controller on pci slot 2
  pci2#0, pci2#1
  If the second port has virtual functions enabled -pci2#1_0,  pci2#1_2
  ... etc
  Biosdevname, which is a Dell developed utility can suggest these names
  for the kernel ethN names. This needs to be used as a udev helper
  utility. It is available here -
  http://linux.dell.com/files/biosdevname/permalink/biosdevname-0.3.1.tar.gz
  
http://linux.dell.com/files/biosdevname/permalink/biosdevname-0.3.1.tar.gz.sign
  GIT: 
http://linux.dell.com/cgi-bin/gitweb/gitweb.cgi?p=biosdevname.git;a=summary
  Please find the relevant upstream discussions -
  http://marc.info/?l=linux-hotplug&m=129003163201746&w=3
  http://marc.info/?l=linux-netdev&m=129100609428767&w=3
  
http://linux.dell.com/files/presentations/Linux_Plumbers_Conf_2010/matt-domsch-network-device-naming.pdf
  
http://linux.dell.com/files/presentations/Linux_Plumbers_Conf_2010/matt-domsch-network-device-naming.ogg
   
  Test Case:
  With this change -
  1.ifconfig -a would show emN names for onboard interfaces.
  2. em1 should correspond to the interface labelled 'Gb1' on the chassis
  label, em2 to 'Gb2' etc. This can be tested by
  ethtool -p em1 (Blinks the interface)
  3. If the kernel has the commit
  911e1c9b05a8e3559a7aa89083930700a0b9e7ee
  cat /sys/class/net/em1/device/label
  Embedded NIC 1
   
  Use Case:
  System administrators can use the Bios provided names which are
  consistent across reboots. There is no state such as HWADDR embedded to
  achieve persistent naming
   
  Business case (Partner benefit):
  openSUSE.org: When there are multiple network interfaces in a system
  (onboard + add-in interfaces), eth0 does not always map to the
  'Embedded NIC 1' as labelled on system chassis. The naming is non-
  deterministic. This feature request addresses the issue by naming the
  interfaces as per the BIOS suggested names.
  Please refer to the following for more details on the reasons for non-
  determinism
  * http://lwn.net/Articles/356900/
  * 
http://linux.dell.com/files/presentations/LinuxCon_2010/linuxcon2010_domsch.pdf
   
+ Discussion:
+ #5: Per Jessen (pjessen) (2011-02-28 17:42:57) 
+ As long as this is user-selectable, it seems like a pretty reasonable
+ idea.
   
   
   

-- 
openSUSE Feature: 
https://features.opensuse.org/310896