wired:~# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.2.5 (March 21, 2008)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth0
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200

Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:14:4f:1f:e5:74

Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:14:4f:1f:e5:75


[   43.258739] Ethernet Channel Bonding Driver: v3.2.5 (March 21, 2008)
[   43.335680] bonding: MII link monitoring set to 100 ms
[   43.478774] bonding: bond0: enslaving eth0 as a backup interface with a down link.
[   43.601857] e1000: eth0: e1000_watchdog: NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX
[   43.706334] bonding: bond0: link status up for interface eth0, enabling it in 200 ms.
[   43.830921] bonding: bond0: making interface eth0 the new active one 100 ms earlier.
[   43.923652] bonding: bond0: first active interface up!
[   43.987883] e1000: eth1: e1000_watchdog: NIC Link is Up 100 Mbps Full Duplex, Flow Control: RX
[   44.090971] bonding: bond0: enslaving eth1 as a backup interface with a down link.
[   44.180389] bonding: bond0: link status up for interface eth1, enabling it in 200 ms.
[   44.530802] bonding: bond0: link status definitely up for interface eth1.