[Bug 1567744] Re: USB NICs get too long name for ifupdown aliases

[Mike Pontillo]

This is also an issue for VLAN interfaces. To support VLANs, 10
characters should be the max. (16 - 1 [for \0], -1 [.], -4 [vid])

Throw in VLANs plus aliases, and, well, I guess we ought to use shorter
names, such as (I don't know) "eth0". ;-)

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https://bugs.launchpad.net/bugs/1567744

Title:
  USB NICs get too long name for ifupdown aliases

Status in systemd package in Ubuntu:
  Triaged

Bug description:
  I have a USB NIC that is connected to my denial system. I tried to
  create an alias, and after reboot, it wasn't created. When I manually
  try to bring it up I have the error.

  /e/n/i:

  auto enx000ec688b79f
  iface enx000ec688b79f inet static
          address 10.90.90.1
          netmask 255.255.255.0

  auto enx000ec688b79f:1
  iface enx000ec688b79f:1 inet static
          address 192.168.100.1
          netmask 255.255.255.0

  ubuntu at maas00:~$ sudo ifup enx000ec688b79f
  ubuntu at maas00:~$ sudo ifup enx000ec688b79f:1
  RTNETLINK answers: Numerical result out of range
  Failed to bring up enx000ec688b79f:1.

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