The difference between bond0 and bond4

Bond0 is a redundant network interface bonding mechanism that provides fault tolerance; Bond4 is an aggregated network interface bonding mechanism that provides high throughput. The choice of mechanism depends on the requirements: Bond0 for redundancy, Bond4 for high throughput and TCP stream optimization.

The difference between Bond0 and Bond4

Bond0 and Bond4 are two different network interface binding mechanisms in Linux . Their main differences are as follows:

1. Purpose

• Bond0: Create a redundant network interface to improve fault tolerance.
• Bond4: Create an aggregated network interface to improve throughput.

2. Load Balancing

• Bond0: Supports different load balancing algorithms (for example, polling, hashing based on source IP, etc.) .
• Bond4: Typically uses the same load balancing algorithm as Bond0, but in Mode 8 it also provides transport flow based load balancing.

3. Redundancy

• Bond0: Fault tolerance can be improved by creating redundant links on two or more physical interfaces . If one interface fails, traffic is automatically diverted to other interfaces.
• Bond4: Does not directly provide redundant functions. However, it can be used to achieve redundancy by combining with other bonding mechanisms (for example, VRRP).

4. Mode

• Bond0: Supports multiple modes, including polling, broadcast, active backup and balanced load aggregation.
• Bond4: Supports Mode 8, which is optimized for TCP and provides session-based load balancing.

5. Performance

• Bond0: Typically provides lower throughput than Bond4.
• Bond4: Can provide higher throughput due to its more advanced load balancing mechanism.

Which mechanism to choose

Selecting Bond0 or Bond4 depends on the specific network requirements:

• If redundancy and fault tolerance are required ability, Bond0 is the best choice.
• If higher throughput and optimization of TCP streams are required, Bond4 is the best choice.

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