Setting network card bonding in Ubuntu

1. Install ifenslave package.
   
   # sudo apt-get install ifenslave
2. Load bonding module.
   
   # sudo modprobe bonding
3. Select bonding mode. Reference here. (ps. I had tried to configure according to official document. But always fails.)
4. Edit /etc/network/interface. Here is an example.
   
   auto bond0
   iface bond0 inet static
           address 192.168.1.1
           netmask 255.255.255.0
           network 192.168.1.0
           gateway 192.168.1.254
           # This option must always be 'none'; use "bond-master" on each interface.
           bond-slaves none
           bond-mode 802.3ad
           bond-miimon 100
           bond-downdelay 200
           bond-updelay 100
   
   auto eth0
   allow-bond0 eth0
   iface eth0 inet manual
           bond-master bond0
   
   auto eth1
   allow-bond0 eth1
   iface eth1 inet manual
           bond-master bond0
5. 802.3ad mode(mode=4) need switch support. In cisco switch , it need to create port-channel in LACP mode.