an old debian bug, It has long been in debian bugzilla
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699445
my patch:
--- /etc/network/if-pre-up.d/ifenslave.old 2015-05-22 17:12:59.181899294 +0500
+++ /etc/network/if-pre-up.d/ifenslave 2014-12-11 16:40:39.000000000 +0500
@@...