Detailed description of the seven modes of Linux network card BOND

Detailed explanation of the seven modes of LINUX network card BOND, specific code examples are required

Abstract:
This article will introduce in detail the seven modes of network card BOND in LINUX system, and provide specific code examples for each mode. . Network card BOND can bind multiple physical network cards into a logical network card to provide high availability and load balancing. By studying this article, readers will have a deeper understanding of the application and configuration of each BOND mode.

Keywords: LINUX, network card BOND, mode, high availability, load balancing, code examples

1. Introduction
In the LINUX system, the network card BOND is a way to combine multiple physical A mechanism for binding network cards into a logical network card, which can provide high availability and load balancing functions. BOND can implement link aggregation between multiple servers to improve the bandwidth and reliability of the server network. This article will introduce the seven modes of LINUX network card BOND and give code examples for each mode.

2. Four load balancing modes

1. Round Robin (polling) mode
   Round Robin mode distributes data packets to each physical network card in turn through polling. superior. Round Robin mode can provide relatively balanced load when all network cards are under load saturation. The following is a code example for configuring Round Robin mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1 eth2
# 设置负载平衡模式为 Round Robin
echo "roundrobin" > /sys/class/net/bond0/bonding/mode

2. Active Backup (active and backup mode) mode
   Active Backup mode uses one of the physical network cards as the primary network card and the other network cards as backup network card. When the primary network card fails, the backup network card will automatically take over. The following is a code example to configure Active Backup mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1
# 设置负载平衡模式为 Active Backup
echo "activebackup" > /sys/class/net/bond0/bonding/mode

3. XOR (or) mode
   The address is XORed and the packet is sent to the corresponding physical network card. This approach enables address-based load balancing. The following is a code example to configure XOR mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1
# 设置负载平衡模式为 XOR
echo "xor" > /sys/class/net/bond0/bonding/mode

4. Broadcast (broadcast) mode
   Broadcast mode will send all data packets to all physical network cards at the same time to achieve a broadcast effect. This method is suitable for scenarios where data needs to be sent to multiple networks at the same time. The following is a code example to configure Broadcast mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1
# 设置负载平衡模式为 Broadcast
echo "broadcast" > /sys/class/net/bond0/bonding/mode

Three high availability modes

1. LACP (Link Aggregation Control Protocol) mode
   LACP mode passes The Link Aggregation Control Protocol implements dynamic load balancing and redundancy backup among multiple physical network cards. The following is a code example to configure LACP mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1
# 设置负载平衡模式为 LACP
echo "lacp" > /sys/class/net/bond0/bonding/mode

2. Adaptive Load Balancing mode
   Adaptive Load Balancing mode dynamically adjusts the load balancing behavior based on the load of each physical NIC. Adjust how packets are sent to achieve load balancing. The following is a code example to configure Adaptive Load Balancing mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1
# 设置负载平衡模式为 Adaptive Load Balancing
echo "alb" > /sys/class/net/bond0/bonding/mode

3. Fault Tolerance (fault-tolerant) mode
   Fault Tolerance mode uses one of the physical network cards as the primary network card and the other network cards as the backup network card . When the primary network card fails, the backup network card will automatically take over. The following is a code example for configuring Fault Tolerance mode:

# 创建 BOND 设备
modprobe bonding
ifenslave bond0 eth0 eth1
# 设置负载平衡模式为 Fault Tolerance
echo "activebackup" > /sys/class/net/bond0/bonding/mode

IV. Conclusion
Through the introduction of this article, readers have a deeper understanding of the seven modes of network card BOND in LINUX systems. BOND can choose different load balancing and high availability modes according to actual needs to improve the bandwidth and reliability of the server network. At the same time, by providing code examples, readers can configure and use these modes more conveniently.

References:
[1] Linux Foundation, "Linux Bonding Driver HOWTO", [Online], Available: https://www.kernel.org/doc/Documentation/networking/bonding.txt
[2] Unixmen, "Linux bonding – 7 modes of bonding", [Online], Available: https://www.unixmen.com/linux-bonding-7-modes-of-bonding/

(Note: The above code examples are for demonstration purposes only, and the actual configuration needs to be adjusted according to the actual environment)

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