Define Which Interfaces Are the Parts of Which Bonds

Issue

How to find which network interfaces are part of a bonded interface?

Environment

All OnApp versions

Resolution

To check the interfaces, run the following command:

grep "MASTER" /etc/sysconfig/network-scripts/*

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Additional Information

When using ifconfig, some interfaces may show up as a SLAVE. These are the parts of the bonded interfaces. To determine which bond they are part of, skip the files with the .bak or other extensions and ignore the lines that start with #, as they are comments.

Example

ifcfg-eth0:MASTER=bond0

ifcfg-eth1:MASTER=bond0

ifcfg-eth2:#MASTER=bond1

ifcfg-eth2.bak:MASTER=bond1

ifcfg-eth3:#MASTER=bond1

ifcfg-eth3.bak:MASTER=bond1

ifcfg-eth4:MASTER=bond1

ifcfg-eth5:MASTER=bond1

ifcfg-eth6:MASTER=bond3

ifcfg-eth7:MASTER=bond3

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In the example above, eth2 and eth3 were parts of bond1, but currently they are not, since they are only mentioned as a comment or in the .bak files. eth0 and eth1 are the parts of bond0, eth4 and eth5 relate to bond1, and eth6 and eth7 are included in bond3.

Additionally, you can check it in the configuration file:

cat /proc/net/bonding/bond_name

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Example

cat /proc/net/bonding/appbond
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth3
MII Status: up
MII Polling Interval (ms): 0
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth3
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 18:66:da:6e:1d:34
Slave queue ID: 0

Slave Interface: eth2
MII Status: up
Speed: Unknown
Duplex: Unknown
Link Failure Count: 0
Permanent HW addr: 18:66:da:6e:1d:32
Slave queue ID: 0

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