[Bug 1315756] [NEW] Interfaces are tried to get configured more than once

[Sworddragon]

Public bug reported:

I'm using Ubuntu 14.10 dev with ifupdown 0.7.48.1ubuntu1 and for a short
time I'm getting the message "ifup: interface eth0 already configured"
into /var/log/upstart/network-interface-eth0.log and "ifup: interface lo
already configured" into /var/log/upstart/network-interface-lo.log. This
is my /etc/network/interfaces:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
	address 192.168.1.2
	dns-nameservers 192.168.1.1
	gateway 192.168.1.1
	netmask 255.255.255.0
	pre-up arp -i eth0 -s 192.168.1.1 00:1c:28:7a:f9:50

** Affects: ifupdown (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1315756

Title:
  Interfaces are tried to get configured more than once

Status in “ifupdown” package in Ubuntu:
  New

Bug description:
  I'm using Ubuntu 14.10 dev with ifupdown 0.7.48.1ubuntu1 and for a
  short time I'm getting the message "ifup: interface eth0 already
  configured" into /var/log/upstart/network-interface-eth0.log and
  "ifup: interface lo already configured" into /var/log/upstart/network-
  interface-lo.log. This is my /etc/network/interfaces:

  # interfaces(5) file used by ifup(8) and ifdown(8)
  auto lo
  iface lo inet loopback

  auto eth0
  iface eth0 inet static
  	address 192.168.1.2
  	dns-nameservers 192.168.1.1
  	gateway 192.168.1.1
  	netmask 255.255.255.0
  	pre-up arp -i eth0 -s 192.168.1.1 00:1c:28:7a:f9:50

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