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Re: Question to new network device names

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On Thu, Aug 24, 2017 at 08:30:33AM -0500, Dave Sherohman wrote:
>On Thu, Aug 24, 2017 at 09:17:00AM -0400, The Wanderer wrote:
>> However, I'll point out that machines with this many network interfaces
>> are *by far* the exception rather than the rule; indeed, even machines
>> with more than *one* interface each of wired and wireless are reasonably
>> rare.
>
>In the home desktop space, perhaps.  When you deal with rackmount
>servers, OTOH, four (wired) network ports is pretty standard these days.
>
>Of course, they're all on the same bus and using identical hardware/
>firmware, so the "order might change based on which drivers load first"
>case still doesn't apply.
>
>> To the best of my awareness, the rationale for calling this "predictable
>> network interface names" is that, on a single computer which has
>> multiple network interfaces of a given type, this naming scheme makes
>> it possible to predict *from one boot to the next* what the name of each
>> one will be. On such a computer, this is extremely valuable.
>>
>> By contrast, on a computer which has at most one interface of a given
>> type, this naming scheme provides - so far as I can tell - no advantage
>> at all.
>>
>> What's more, when working on *multiple* computers of that latter type,
>> this naming scheme makes it impossible to predict *from one computer to
>> the next* what the name of the sole available interface will be.
>>
>> As such, IMO this naming scheme makes network-interface names
>> significantly *less* predictable in the real-world scenario which is
>> most commonly encountered.
>
>This closely parallels the move from using /dev/sdXn to UUIDs for
>referring to filesystems.  Probably superior in theory and doesn't cause
>any issues as long as you're dealing with a single machine and
>unchanging hardware configuration... but then you have a drive failure,
>restore your backups onto new hardware, and you're hosed because the
>system wants to boot from a UUID that no longer exists.  (Yes, you can
>recover from that situation - I know because I've had to do it - but it
>doesn't Just Work(TM) effortlessly.)

I think you're right here and, in both cases, if you're not using more 
manageable names, then you're not using the system to its fullest.

You wouldn't refer to a host by it's IP address, or it's MAC address or 
it's Serial Number, you'd give it a name. So why not name your drives 
(and then use the by-label or LABEL= system) and why not name your 
interfaces (core-network0, core-network1, backup-lan, monitoring-lan - 
they don't HAVE to have numbers)


-- 
For more information, please reread.

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Question to new network device names Hans <hans.ullrich@loop.de> - 2017-08-24 13:20 +0200
  Re: Question to new network device names Dejan Jocic <jodejka@gmail.com> - 2017-08-24 13:40 +0200
  Re: Question to new network device names Jude DaShiell <jdashiel@panix.com> - 2017-08-24 13:50 +0200
  Re: Question to new network device names <tomas@tuxteam.de> - 2017-08-24 14:00 +0200
    Re: Question to new network device names The Wanderer <wanderer@fastmail.fm> - 2017-08-24 15:20 +0200
      Re: Question to new network device names <tomas@tuxteam.de> - 2017-08-24 15:30 +0200
      Re: Question to new network device names Dave Sherohman <dave@sherohman.org> - 2017-08-24 15:40 +0200
        Re: Question to new network device names The Wanderer <wanderer@fastmail.fm> - 2017-08-24 16:00 +0200
        Re: Question to new network device names Dan Ritter <dsr@randomstring.org> - 2017-08-24 16:30 +0200
          Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 17:50 +0200
            Re: Question to new network device names The Wanderer <wanderer@fastmail.fm> - 2017-08-24 18:10 +0200
              Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 18:50 +0200
                Re: Question to new network device names Dan Ritter <dsr@randomstring.org> - 2017-08-24 19:10 +0200
                Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 20:20 +0200
                Re: Question to new network device names The Wanderer <wanderer@fastmail.fm> - 2017-08-25 05:10 +0200
                Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-25 07:30 +0200
            Re: Question to new network device names Dan Ritter <dsr@randomstring.org> - 2017-08-24 18:40 +0200
              Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 21:30 +0200
              Re: Question to new network device names Gene Heskett <gheskett@shentel.net> - 2017-08-25 03:00 +0200
                Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-25 04:30 +0200
                Re: Question to new network device names Gene Heskett <gheskett@shentel.net> - 2017-08-25 07:00 +0200
                Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-25 07:30 +0200
                Re: Question to new network device names Gene Heskett <gheskett@shentel.net> - 2017-08-25 08:30 +0200
                Re: Question to new network device names Dan Ritter <dsr@randomstring.org> - 2017-08-25 15:30 +0200
                Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-25 17:10 +0200
        Re: Question to new network device names Darac Marjal <mailinglist@darac.org.uk> - 2017-08-24 17:50 +0200
          Re: Question to new network device names The Wanderer <wanderer@fastmail.fm> - 2017-08-24 18:00 +0200
            Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 19:00 +0200
              Re: Question to new network device names Greg Wooledge <wooledg@eeg.ccf.org> - 2017-08-24 19:40 +0200
                Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 20:00 +0200
      Re: Question to new network device names David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 18:20 +0200
  Re: Question to new network device names Hans <hans.ullrich@loop.de> - 2017-08-25 14:00 +0200

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