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# HOW TO : Check status of bond interface in Linux
- URL: https://kudithipudi.org/how-to-check-status-of-bond-interface-in-linux/
- Published: 2010-07-30T20:03:36.000Z
- Updated: 2010-07-30T20:03:36.000Z
- Description: For my notes.. If you ever wanted to check the status of a bonded interface configure in Linux (esp RHEL), you can check the status by...
- Author: admin
- Tags: HOWTO, Linux, Networking, Technology, Uncategorized, #wp, #wp-post, #Import 2026-08-23 02:32

For my notes.. If you ever wanted to check the status of a bonded interface configure in Linux (esp RHEL), you can check the status by running the following command

\[root@serverxyz bin\]# cat /proc/net/bonding/bond0  

i.e. assuming the name of your bond interface is bond0.

Output from the command

Ethernet Channel Bonding Driver: v3.4.0 (October 7, 2008)  
  
Bonding Mode: fault-tolerance (active-backup)  
Primary Slave: eth3 (primary\_reselect always)  
Currently Active Slave: eth3  
MII Status: up  
MII Polling Interval (ms): 100  
Up Delay (ms): 0  
Down Delay (ms): 0  
  
Slave Interface: eth3  
MII Status: up  
Link Failure Count: 0  
Permanent HW addr: 00:10:18:6e:b8:1a  
  
Slave Interface: eth0  
MII Status: up  
Link Failure Count: 0  
Permanent HW addr: 00:21:5e:11:34:32  

The configuration files involved are

/etc/sysconfig/network-scripts/ifcfg-bond0 (Bond Interface)

DEVICE=bond0  
IPADDR=10.10.40.26  
NETMASK=255.255.255.0  
ONBOOT=yes  
BOOTPROTO=none  
USERCTL=no  
GATEWAY=10.10.40.1  
NETWORK=10.10.40.0  
BROADCAST=10.10.40.255  
TYPE=Ethernet

/etc/sysconfig/network-scripts/ifcfg-eth3 (Primary Interface)

DEVICE=eth3  
BOOTPROTO=none  
ONBOOT=yes  
HWADDR=00:10:18:6e:b8:1a  
MASTER=bond0  
SLAVE=yes  
TYPE=Ethernet  
USERCTL=no

/etc/sysconfig/network-scripts/ifcfg-eth0 (Secondary Interface)

DEVICE=eth0  
HWADDR=00:21:5e:11:34:32  
USERCTL=no  
ONBOOT=yes  
MASTER=bond0  
SLAVE=yes  
BOOTPROTO=none  
TYPE=Ethernet