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# Tested on RHEL 5, 6 & 7
# Red Hat Enterprise Linux allows administrators to bind multiple network interfaces # together into a single channel using the bonding kernel module and a special network # interface called a "channel bonding interface". Channel bonding enables two or more # network interfaces to act as one, simultaneously increasing the bandwidth and providing # redundancy. # To create a channel bonding interface, create a file in the /etc/sysconfig/network-scripts # directory called <ifcfg-bondN>, replacing "N" with the number for the interface, such as 0. # The contents of the file can be identical to whatever type of interface is getting # bonded, such as an Ethernet interface. The only difference is that the DEVICE directive # must be bondN, replacing N with the number for the interface. # The following is a sample channel bonding configuration file (RHEL 6): DEVICE=bond0 IPADDR=192.168.1.1 NETMASK=255.255.255.0 ONBOOT=yes BOOTPROTO=none USERCTL=no BONDING_OPTS="bonding parameters separated by spaces" # After the channel bonding interface is created, the network interfaces to be bound # together must be configured by adding the MASTER and SLAVE directives to their # configuration files. The configuration files for each of the channel-bonded interfaces # can be nearly identical. # For example, if two Ethernet interfaces are being channel bonded, both eth0 and eth1 # may look like the following example: DEVICE=<ethN> BOOTPROTO=none ONBOOT=yes MASTER=bond0 SLAVE=yes USERCTL=no # For a channel bonding interface to be valid, the kernel module must be loaded # ('modprobe bonding'). To ensure that the module is loaded when the channel bonding # interface is brought up, for RHEL 6, create a new file as root named bonding.conf in # the /etc/modprobe.d directory or, if working with RHEL 5, add the configuration # directly to /etc/modprobe.conf (this file is deprecated on RHEL 6). On RHEL 7 it is # not necessary to indicate explicitly to load bonding kernel module as, once the
# interfaces configured for bonding, module will be automatically loaded on startup. # RHEL 7:
# No need to explicitly load bonding module
# RHEL 6: vi /etc/modprobe.d/bonding.conf alias <bondN> bonding # RHEL 5: vi /etc/modprobe.conf alias <bondN> bonding options <bondN> mode=<active-backup> miimon=<100> primary_reselect=<failure> primary=<ethX> downdelay=<100> updelay=<5000> # *** Note: On RHEL 6 we'll put all bonding module parameters in <ifcfg-bondN> files. # that will allow to specify different configurations for different bonding # interfaces. # Additional commands # ------------------------------------------------------------------------------------------ # Start a "bonding" network interface ifup <bond0> # Stop a "bonding" network interface and free all slave interfaces ifdown <bond0> # Remove a slave interface without stopping "bonding" interface: ifenslave {-d|--detach} <bond0> <eth0> [<eth1> <eth2> ...] # Change active slave: ifenslave {-c|--change-active} <bond0> <eth0> # Show information about "master" interface: ifenslave <bond0> cat /proc/net/bonding/<bond0> # Show information about all interfaces: ifenslave {-a|--all-interfaces} # Configuration examples # ------------------------------------------------------------------------------------------ # RHEL 5 # ------------------------------------------------------------------------------------------ vi /etc/modprobe.conf alias bond0 bonding options bond0 mode=active-backup miimon=100 primary_reselect=failure primary=eth3 downdelay=100 updelay=5000 modprobe bonding cd /etc/sysconfig/network-scripts vi ifcfg-bond0 DEVICE=bond0 BOOTPROTO=static IPADDR=10.150.0.107 NETMASK=255.255.252.0 ONBOOT=yes USERCTL=no vi ifcfg-eth3 DEVICE=eth3 BOOTPROTO=none HWADDR=90:E2:BA:55:1F:DB MASTER=bond0 SLAVE=yes ONBOOT=yes USERCTL=no vi ifcfg-eth6 DEVICE=eth6 BOOTPROTO=none HWADDR=40:F2:E9:0C:9A:5E MASTER=bond0 SLAVE=yes ONBOOT=yes USERCTL=no cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.4.0-1 (October 7, 2008) Bonding Mode: fault-tolerance (active-backup) Primary Slave: eth3 (primary_reselect failure) Currently Active Slave: eth3 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 5000 Down Delay (ms): 100 Slave Interface: eth3 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 90:e2:ba:55:1f:db Slave Interface: eth6 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 40:f2:e9:0c:9a:5e # RHEL 6 # ------------------------------------------------------------------------------------------ vi /etc/modprobe.d/bonding.conf alias bond0 bonding modprobe bonding cd /etc/sysconfig/network-scripts vi ifcfg-bond0 DEVICE=bond0 BOOTPROTO=static IPADDR=10.149.72.202 NETMASK=255.255.252.0 ONBOOT=yes USERCTL=no IPV6INIT=no BONDING_OPTS="mode=active-backup miimon=100 primary_reselect=failure primary=eth0 downdelay=100 updelay=5000" vi ifcfg-eth0 DEVICE=eth0 BOOTPROTO=none HWADDR=F0:92:1C:0D:53:90 MASTER=bond0 SLAVE=yes ONBOOT=yes USERCTL=no vi ifcfg-eth1 DEVICE=eth1 BOOTPROTO=none HWADDR=F0:92:1C:0D:53:94 MASTER=bond0 SLAVE=yes ONBOOT=yes USERCTL=no ifup bond0 cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009) Bonding Mode: fault-tolerance (active-backup) Primary Slave: eth0 (primary_reselect failure) Currently Active Slave: eth0 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 5000 Down Delay (ms): 100 Slave Interface: eth0 MII Status: up Speed: 600 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: f0:92:1c:0d:53:90 Slave queue ID: 0 Slave Interface: eth1 MII Status: up Speed: 600 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: f0:92:1c:0d:53:94 Slave queue ID: 0 # RHEL 7 # ------------------------------------------------------------------------------------------ modprobe bonding cd /etc/sysconfig/network-scripts vi ifcfg-bond0 DEVICE=bond0 TYPE=bond NAME=bond0 BONDING_MASTER=yes BOOTPROTO=none ONBOOT=yes IPADDR=192.168.1.22 NETMASK=255.255.255.0 GATEWAY=192.168.1.254 BONDING_OPTS="mode=active-backup miimon=100 primary_reselect=failure primary=eth0 downdelay=100 updelay=5000" vi ifcfg-enp2s7 TYPE=Ethernet BOOTPROTO=static DEVICE=enp2s7 ONBOOT=yes HWADDR=00:00:1c:d5:e3:6f MASTER=bond0 SLAVE=yes vi ifcfg-enp2s8 TYPE=Ethernet BOOTPROTO=static DEVICE=enp2s8 ONBOOT=yes HWADDR=00:08:a1:6c:7e:79 MASTER=bond0 SLAVE=yes ifup bond0 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: enp2s7 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 5000 Down Delay (ms): 100 Slave Interface: enp2s7 MII Status: up Speed: 100 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:00:1c:d5:e3:6f Slave queue ID: 0 Slave Interface: enp2s8 MII Status: up Speed: 100 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:08:a1:6c:7e:79 Slave queue ID: 0 |