Examine the output of a bonded interface configuration from which one network cable has
been unplugged: # cat /proc.net/bonding/bond0 Ethernet Channel Bonding Driver: v3.6.0
(September 26, 2009) Bonding Mode: fault-tolerance (active-backup) Primary Slave: None
Currently Active Slave: eth2 MII Status: up MII poling interval (ms): 100 Up Delay (ms): 0
Down Delay (ms): 0 Slave Interface: eth1 MII status: down Link Failure Count: 1 Permanent
HW addr: 00:0c:29:7b:3c:71 Slave Queue ID: 0 Slave Interface: eth2 MII Status: up Link
Failure Count: 0 Permanent HW addr: 00:0c:29:7b:3s:7b Which statement is true when you
plug in the eth1 network cable?
A.
The status of the slave interface eth1 changes to up and is promoted to the active slave
and eth2 becomes the backup slave.
B.
The status of the slave interface eth1 changes to up and becomes a second active slave.
C.
The status of the slave interface eth1 changes to up but must be manually assigned the
active or backup slave role.
D.
The status of the slave interface eth1 changes to up and becomes the backup slave.
Explanation:
D
Explanation: D not A. In an active-backup fault-tolerance setting with Primary Slave set to None, the Current Active slave continues its role until it is unavailable. Bringing up the other interface does NOT take the Current Active Slave role unless that interface is designated as the Primary Slave.
Reference:
https://www.kernel.org/doc/Documentation/networking/bonding.txt
See the active-backup and the primary section.