Linux dual NIC bonding configuration __linux

1. Check to see if your system supports bonding

First, execute the command:

$rpm-qf/sbin/ifup

It returns a line of text, beginning with "initscripts" or "Sysconfig", which is the package that provides the network initialization script.

Next, to determine if your installation supports bonding, execute the command:

$grep Ifenslave/sbin/ifup

If any matching records are returned, your initscripts or sysconfig support bonding

2. Modify the configuration of the network adapter

To modify the current network adapter profile, the configuration files are placed in the/etc/sysconfig/network-scripts directory, as follows:

First network adapter:

Vim/etc/sysconfig/network-scripts/eth0

Device=eth0

Onboot=yes

Bootproto=none

Master=bond0

Slave=yes

Second network adapter:

Vim/etc/sysconfig/network-scripts/eth1

Device=eth1

Userctl=no

Onboot=yes

Master=bond0

Slave=yes

Bootproto=none

3. Create a bonding network script

Vim/etc/sysconfig/network-scripts/bond0

Device=bond0

ipaddr=192.168.1.66

netmask=255.255.255.0

network=192.168.1.0

broadcast=192.168.1.255

Onboot=yes

Bootproto=none

Userctl=no

4.bond-driven options

The bonding-driven option is set by setting parameters at load time, usually specified in the following two files.

Edit/etc/modprobe.conf and add the following two lines:

Alias Bond0 Bonding

Options Bond0 mode=1 million=100

Description
mode specifies the working mode of the bond0, which is commonly used in 0 and 1,0 for load balancing, and 1 for master-slave mode, which can be configured on demand. Commonly used for 0, 12 species. Mode=0 indicates that the load balancing (round-robin) is loaded in a balanced way and both cards work. Mode=1 means that fault-tolerance (active-backup) provides redundancy, working in a way that is normally done, which means that by default only one network card works and the other is backed up. Bonding can only provide link monitoring, that is, whether the link from the host to the switch is connected. If only the switch is down on the external link, and the switch itself is not faulty, then bonding will assume that the link is not problematic and continue to use it. Miimon is used for link monitoring. For example: miimon=100, then the system every 100MS monitoring link connection status, if one line does not pass to the other route.

5. Enable bonding

#service Network Restart

6. Test

Cat/proc/net/bonding/bond0

Ethernet Channel Bonding Driver:v2.6.3-rh (June 8, 2005)

Bonding Mode:fault-tolerance (active-backup)

Primary Slave:none

Currently Active Slave:eth0 MII status:up

MII Polling Interval (ms): 100
Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface:eth0

MII status:up Link Failure count:0

Permanent HW addr:00:0c:29:6e:40:9d

Slave interface:eth1

MII Status:up

Link Failure count:0

Permanent HW Addr:00:0c:29:6e:40:a7

If you unplug the eth0 cable, ETH1 will replace it with active

Currently Active Slave:eth0

Slave Interface:eth0

MII Status:down

Slave interface:eth1

MII Status:up

It shows that the mode 1 of bonding is a primary standby ha mode.

Ethernet Channel Bonding Driver:v2.6.3-rh (June 8, 2005)

Bonding Mode:fault-tolerance (active-backup)

Primary Slave:none

Currently Active Slave:eth0

MII Status:up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface:eth0

MII Status:up

Link Failure count:0

Permanent HW addr:00:0c:29:6e:40:9d

Slave interface:eth1

MII Status:up

Link Failure count:0

Permanent HW Addr:00:0c:29:6e:40:a7

If this is the

Eth0

The Connected network cable is unplugged,

Eth1

will be replaced by becoming

Active

Currently Active Slave:eth0

Slave Interface:eth0

MII Status:down

Slave interface:eth1

MII Status:up

Show

Bonding

The mode

1

, is a kind of main standby

HA

of the model.

Ethernet Channel Bonding Driver:v2.6.3-rh (June 8, 2005)

Bonding Mode:fault-tolerance (active-backup)

Primary Slave:none

Currently Active Slave:eth0

MII Status:up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface:eth0

MII Status:up

Link Failure count:0

Permanent HW addr:00:0c:29:6e:40:9d

Slave interface:eth1

MII Status:up

Link Failure count:0

Permanent HW Addr:00:0c:29:6e:40:a7

If this is the

Eth0

The Connected network cable is unplugged,

Eth1

will be replaced by becoming

Active

Currently Active Slave:eth0

Slave Interface:eth0

MII Status:down

Slave interface:eth1

MII Status:up

Show

Bonding

The mode

1

, is a kind of main standby

HA

of the model.