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Re: how to compute predictable network interface names?

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On 02/16/2017 12:47 PM, Christian Seiler wrote:
> 
> On a system with predictable names running? Or on a system
> pre-upgrade?
> 

Its more "pre-installation". I boot a USB stick and run
my own installer (using debootstrap or creating a clone).
The NIC name is needed to setup /etc/network/interfaces.
I know how the interfaces are named using the old scheme,
but the predictable names are hard to guess.

> Because if you have a system that's being upgraded at the
> moment, the following command _might_ work _after_ you've
> upgraded udev and _before_ you've rebooted the system.
> 
> udevadm info /sys/class/net/eth4
> 
> Look at ID_NET_NAME there.
> 

I found 3 for eth0 on my desktop PC:

	E: ID_NET_NAME_MAC=enx54bef70930bd
	E: ID_NET_NAME_ONBOARD=eno1
	E: ID_NET_NAME_PATH=enp0s25

For a server with 6 NICs I got for eth4

	E: ID_NET_NAME_MAC=enx0cc47a860566
	E: ID_NET_NAME_PATH=enp4s0f2
	E: ID_NET_NAME_SLOT=ens261f2

A wild guess would be it is "ID_NET_NAME_PATH" unless there is
a "ID_NET_NAME_ONBOARD" ? I understand that this is the fragile
part.


Nice tip, thanx very much
Harri

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Thread

how to compute predictable network interface names? Harald Dunkel <harald.dunkel@aixigo.de> - 2017-02-16 12:30 +0100
  Re: how to compute predictable network interface names? Christian Seiler <christian@iwakd.de> - 2017-02-16 12:50 +0100
    Re: how to compute predictable network interface names? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-02-16 14:40 +0100
    Re: how to compute predictable network interface names? Harald Dunkel <harald.dunkel@aixigo.de> - 2017-02-23 16:20 +0100
      Re: how to compute predictable network interface names? Christian Seiler <christian@iwakd.de> - 2017-02-23 16:30 +0100
        Re: how to compute predictable network interface names? Harald Dunkel <harald.dunkel@aixigo.de> - 2017-02-24 10:20 +0100
          Re: how to compute predictable network interface names? Harald Dunkel <harald.dunkel@aixigo.de> - 2017-02-24 11:00 +0100
          Re: how to compute predictable network interface names? Christian Seiler <christian@iwakd.de> - 2017-02-24 12:50 +0100
            Re: how to compute predictable network interface names? Harald Dunkel <harald.dunkel@aixigo.de> - 2017-03-09 12:10 +0100
      Re: how to compute predictable network interface names? Stephen Powell <zlinuxman@fastmail.com> - 2017-02-23 18:10 +0100

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