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iperf3: A TCP, UDP, and SCTP network bandwidth measurement tool
iperf3 is a widely-used command-line tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, buffers, and protocols (TCP, UDP, SCTP).
C
Added on 2025年6月28日7,613
Stars1,342
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LanguageProject Introduction
Summary
iperf3 is the leading open-source tool for measuring network throughput. Designed for testing network performance between endpoints, it is an essential utility for network engineers, system administrators, and developers.
Problem Solved
Accurately measuring network bandwidth and diagnosing performance issues between two points on a network can be challenging. iperf3 provides a reliable and flexible tool to perform these active measurements, helping identify bottlenecks and verify network configurations.
Core Features
Multi-Protocol Support
Supports TCP, UDP, and SCTP protocols for comprehensive testing.
Client-Server Architecture
Operates in client-server mode, allowing bandwidth measurement between any two nodes.
Extensive Parameter Tuning
Offers control over parameters like bandwidth, number of parallel streams, MTU, and window sizes.
Multiple Output Formats
Provides output in various formats, including a machine-readable JSON output for easy parsing.
Tech Stack
C
C++
使用场景
iperf3 is used in various scenarios requiring precise network performance measurement:
Scenario 1: Link Capacity Testing
Details
Measure the maximum throughput between two servers in a data center or across a Wide Area Network link.
User Value
Verify provisioned bandwidth, identify potential link congestion, and ensure expected network performance.
Scenario 2: Network Troubleshooting and Diagnosis
Details
Simulate different traffic patterns (e.g., UDP with specific bandwidth and loss) to test network device behavior or QoS configurations.
User Value
Pinpoint network bottlenecks, diagnose packet loss or latency issues, and validate network equipment performance under load.
Scenario 3: Performance Benchmarking and Comparison
Details
Benchmark network performance on different operating systems or hardware platforms, and compare the efficiency of TCP vs UDP for specific tasks.
User Value
Understand platform-specific network performance characteristics and optimize protocol choice for applications.
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