======NIC bonding======

参考
  *http://mkws.blogspot.jp/2012/12/raspberry-piusb-wifi.html
  *https://wiki.debian.org/Bonding

ifenslaveの導入
<code>
# apt-get install ifenslave
# modprobe bonding
# lsmod | grep bonding
</code>

#  vi /etc/modules
<code>
bonding
</code>

# vi /etc/modprobe.d/bonding.conf 
<code>
alias bond0 bonding
  options bond0 mode=1
(/etc/modprobe.d/bonding.conf で options bond0 mode=1はなくてもよさそう）
</code>

# vi /etc/network/interfaces
<code>
iface eth0 inet manual
#iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
#iface wlan0 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
    bond-give-a-chance 10

auto bond0
iface bond0 inet dhcp
  bond-mode 1
  bond-miimon 100
  slaves eth0 wlan0
  bond-primary eth0
 (active-backupを設定)
</code>

# vi /etc/dhcpcd.conf
<code>
denyinterfaces eth0 wlan0
</code>

# /etc/init.d/networking stop