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Re: Naming of network devices - how to improve it in buster

On Tue, Jul 11, 2017 at 06:04:29PM +0200, Guus Sliepen wrote:

> This is not impossible to do. I actually have some code to make ifupdown
> use interface matching, I'm afraid I was too late in the stretch cycle
> to have a well-tested implementation. I will try to add this early in
> buster so it can be tested properly and any kinks resolved.

Initial support for interface matching has been uploaded, so once it
hits your mirror you can apt-get upgrade to ifupdown 0.8.20 and use it.
An example to match an interface by MAC address:

    allow-hotplug mac/01:23:45:67:89:ab/=foo
    iface foo inet dchp
    iface foo inet6 auto

    auto type/1/2=bar
    iface bar inet static

This will match any interface that has MAC address 01:23:45:67:89:ab,
and will use the "foo" stanzas to configure it. It will also match the
second Ethernet interface (whose /sys/class/net/interfaces/$IFACE/type
file contains the line "1") and bring it up using the "bar" stanza.
Details are in the interfaces(5) manpage.

You can also use pattern matching on the ifup and ifdown command line.
You cannot use pattern matching in "iface" stanzas (yet).

The reason I used the / is that this is, as far as I know, the only
character that is never allowed in interface names on Linux. On that
note, the above examples will not work on Hurd and FreeBSD, support for
pattern matching on those platforms besides just the interface name will
follow later.

Met vriendelijke groet / with kind regards,
      Guus Sliepen <guus@xxxxxxxxxx>

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