Tuesday, April 25, 2017

Ethernet bonding in rhel7 and centos 7

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Load the bonding module:
[root@localhost network-scripts]# modprobe --first-time bonding

Check the module:
[root@localhost network-scripts]# modinfo bonding

Create bond interface as below
[root@localhost network-scripts]# cat ifcfg-bond0
DEVICE=bond0
NAME=bond0
TYPE=Bond
BONDING_MASTER=yes
IPADDR=192.168.56.114
NETMASK=255.255.255.0
ONBOOT=yes
BOOTPROTO=none
USERCTL=no
BONDING_OPTS="mode=1 miimon=100"

Create Slave 1:
[root@localhost network-scripts]# cat ifcfg-enp0s9
BOOTPROTO=none
NAME=enp0s9
DEVICE=enp0s9
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no

Create Slave 2:
[root@localhost network-scripts]# cat ifcfg-enp0s10
BOOTPROTO=none
NAME=enp0s10
DEVICE=enp0s10
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no
[root@localhost network-scripts]#

Bring the interfaces up and restart network:
[root@localhost network-scripts]# ifup bond0
[root@localhost network-scripts]# ifup ifcfg-enp0s9
[root@localhost network-scripts]# ifup ifcfg-enp0s10
[root@localhost network-scripts]# nmcli con reload
[root@localhost network-scripts]# systemctl restart network

Check the status of the bonding interface:
[root@localhost network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: enp0s10
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: enp0s10
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 15
Permanent HW addr: 08:00:27:1d:16:27
Slave queue ID: 0

Slave Interface: enp0s9
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 15
Permanent HW addr: 08:00:27:0a:f8:11
Slave queue ID: 0
[root@localhost network-scripts]#

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