Comment 5 for bug 1269921

I have the same problem. I've a box with 4 NICs.

2x1 GigE Intel cards (eth1, eth3)
2x10 GigE Broadcoam cards (eth0, eth2)

I'm booting up with the first Intel card which gets an DHCP IP which works fine:

https://gist.github.com/stefanandres/ba24835c3b36795f94c3#file-interfaces-without-bonding

Then I swap that interfaces file (in the end by puppet, but now manually for debugging):

https://gist.github.com/stefanandres/ba24835c3b36795f94c3#file-interfaces-with-minimal-bonding

Then I do ifdown -a which brings all interfaces down and then do a ifup -a -v and then ifup -a hangs forever in the [ -f /run/network/ifenslave.bond0 ] loop:

https://gist.github.com/stefanandres/ba24835c3b36795f94c3#file-ifup-verbose-output