Ubuntu
ifupdown package

  1. Bug #1126560
  2. Comment #12

Comment 12 for bug 1126560

Revision history for this message
Stéphane Graber (stgraber) wrote :

From the manpage:
"""
       When ifupdown is being called with the --all option, before doing anything to interfaces, if calls all the hook scripts (pre-up or down) with IFACE set to
       "--all", LOGICAL set to the current value of --allow parameter (or "auto" if it's not set), ADDRFAM="meta" and METHOD="none". After all the interfaces have
       been brought up or taken down, the appropriate scripts (up or post-down) are executed.
"""

So when called with -a, it'll first call the hooks with IFACE="--all" and then call them again for each interface.