[Bug 1126560] Re: /etc/networking/* are executed multiple times

[Stéphane Graber]

both are the correct behaviour.

Most interfaces are brought up through udev events as soon as the kernel finds them, however the standard "sequential" bring up is still there for the few cases where we fail to get kernel events.
Those cases include ethX interfaces in containers, tunnel devices, complex bonding setup, bridges, complex vlan setup, ...

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https://bugs.launchpad.net/bugs/1126560

Title:
  /etc/networking/* are executed multiple times

Status in “ifupdown” package in Ubuntu:
  New

Bug description:
  I'm using Ubuntu 13.04 dev with ifupdown 0.7.5ubuntu2. I have noticed
  that on booting my system in /etc/networking the scripts in if-pre-
  up.d and if-up.d are executed multiple times. On my observations I
  have noticed that they can even be executed parallelized. I have
  logged what happened on a boot:

  1. The content of /etc/networking/if-pre-up.d is executed parallelized 2 times.
  2. After they have finished the content of /etc/networking/if-up.d is excuted.
  3. Then the content of /etc/networking/if-pre-up.d is excuted again.
  4. At last the content of /etc/networking/if-up.d is executed again too.

  As a summary: The content of /etc/networking/if-pre-up.d was executed
  3times and /etc/networking/if-up.d 2 times.

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