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update centos wording for eol
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articles/virtual-network/virtual-network-test-latency.md

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ms.service: virtual-network
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ms.topic: how-to
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ms.custom: linux-related-content
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ms.date: 03/23/2023
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ms.date: 08/02/2024
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ms.author: allensu
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---
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# Test network latency between Azure VMs
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> [!CAUTION]
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> This article references CentOS, a Linux distribution that is End Of Life (EOL) status. Please consider your use and plan accordingly. For more information, see the [CentOS End Of Life guidance](~/articles/virtual-machines/workloads/centos/centos-end-of-life.md).
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This article describes how to test network latency between Azure virtual machines (VMs) by using the publicly available tools [Latte](https://github.com/microsoft/latte) for Windows or [SockPerf](https://github.com/mellanox/sockperf) for Linux.
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For the most accurate results, you should measure VM network latency with a tool that's designed for the task and excludes other types of latency, such as application latency. Latte and SockPerf provide the most relevant network latency results by focusing on Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) traffic. Most applications use these protocols, and this traffic has the largest effect on application performance.
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On both the *sender* and *receiver* Linux VMs, run the following commands to prepare for SockPerf, depending on your Linux distro.
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- Red Hat Enterprise Linux (RHEL) or CentOS:
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- Red Hat Enterprise Linux (RHEL):
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```bash
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#RHEL/CentOS - Install Git and other helpful tools
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#RHEL - Install Git and other helpful tools
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sudo yum install gcc -y -q
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sudo yum install git -y -q
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sudo yum install gcc-c++ -y

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