@Pete Ashdown yes, there is a workaround. First one of the things that goes wrong is that ethernet media autoconfiguration takes up time and causes network interfaces to take so long to come up there is the possibility that that will interfere with bonding configuring. You can hardcode the media speed/duplex/etc on the switch and in /etc/network/interfaces
auto eth0 iface eth0 inet manual media 1000baseTx-FD for each eth0 device to be bonded. Next you can get bonding to work by using pre-up, etc. in /etc/network/interfaces like this: auto bond0 iface bond0 inet manual pre-up modprobe bonding mode=802.3ad ad_select=bandwidth downdelay=400 miimon=100 lacp_rate=0 max_bonds=2 ; ifconfig bond0 up ; ifconfig eth0 up ; ifconfig eth1 up post-up ifenslave bond0 eth0 eth1 pre-down ifenslave -d bond0 eth0 eth1 post-down ifconfig eth0 down ; ifconfig eth1 down ; ifconfig bond0 down -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/482419 Title: 802.3ad interface bonding fails if started too early -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs