muhamadfaiz / linux-interface-bonding Goto Github PK

#Linux Interface Bonding

We bond two or more network interface together so that if one interface is down, we will have the other interface as backup.

We will set up this on Centos 6 Minimal installation.

1. Load required module

   modprobe --first-time bonding
   

2. Verify module loaded

   modinfo bonding
   

3. Create a bond interface script

   vi /etc/sysconfig/network-scripts/ifcfg-bond0
   

4. Put below code as its content

   DEVICE=bond0
   IPADDR=[IP address]
   NETMASK=255.255.255.0
   ONBOOT=yes
   BOOTPROTO=none
   USERCTL=no
   NM_CONTROLLED=no
   BONDING_OPTS="mode=1 miimon=100 fail_over_mac=1"
   

5. Edit eth1 and eth2 script

   eth1

   vi /etc/sysconfig/network-scripts/ifcfg-eth1
   DEVICE=eth1
   HWADDR=ff:ff:ff:ff:ff:ff
   TYPE=Ethernet
   ONBOOT=yes
   NM_CONTROLLED=no
   BOOTPROTO=none
   MASTER=bond0
   SLAVE=yes
   USERCTL=no
   

   eth2

   vi /etc/sysconfig/network-scripts/ifcfg-eth2
   DEVICE=eth2
   HWADDR=ff:ff:ff:ff:ff:ff
   TYPE=Ethernet
   ONBOOT=yes
   NM_CONTROLLED=no
   BOOTPROTO=none
   MASTER=bond0
   SLAVE=yes
   USERCTL=no
   

6. Set bond0 as autostart. This configuration will survive reboot

   vi /etc/modprobe.d/bonding.conf
   alias bond0 bonding
   

7. Save both script and restart network

   service network restart

8. Verify bond interface working

   cat /proc/net/bonding/bond0
   Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
   
   Bonding Mode: load balancing (round-robin)
   MII Status: up
   MII Polling Interval (ms): 0
   Up Delay (ms): 0
   Down Delay (ms): 0
   
   Slave Interface: eth1
   MII Status: up
   Speed: 1000 Mbps
   Duplex: full
   Link Failure Count: 0
   Permanent HW addr: [MAC ADDRESS]
   Slave queue ID: 0
   
   Slave Interface: eth2
   MII Status: up
   Speed: 1000 Mbps
   Duplex: full
   Link Failure Count: 0
   Permanent HW addr: [MAC ADDRESS]
   Slave queue ID: 0
   

Reference

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s2-networkscripts-interfaces-chan.html

https://community.oracle.com/thread/2546040

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.3/html/Installation_Guide/Bonding_Modes.html