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subnav_group-title">Requirements<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-requirements/" class=" "><span class="subnav_list-text">Insight Network Sensor Requirements</span><span class="subnav_list-toggle plus"></span></a><div class="subnav_list-sub"><ul><li class="subnav_list-item"><a href="/sensor/network-sensor-host-system-requirements/" class=" "><span class="subnav_list-text">Network Sensor Host System Requirements</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/network-requirements-for-network-sensor-deployment/" class=" "><span class="subnav_list-text">Network Requirements for Network Sensor Deployment</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li><li class="subnav_list-item"><a href="/sensor/network-sensor-for-aws-requirements/" class=" "><span 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Traffic Source</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-3-provision-a-network-sensor-host/" class=" "><span class="subnav_list-text">Step 3: Provision a Network Sensor Host</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-4-download-and-install-the-network-sensor-software/" class=" "><span class="subnav_list-text">Step 4: Download and Install the Network Sensor Software</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-5-configure-network-interface-details-in-the-insight-platform/" class=" "><span class="subnav_list-text">Step 5: Configure Network Interface Details in the Insight Platform</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li><li class="subnav_list-item"><a href="/sensor/network-sensor-for-aws-deployment-guide/" class=" "><span class="subnav_list-text">Network Sensor for AWS Deployment Guide</span><span class="subnav_list-toggle plus"></span></a><div class="subnav_list-sub"><ul><li class="subnav_list-item"><a href="/sensor/option-1-network-sensor-cloudformation/" class=" "><span class="subnav_list-text">Option 1: Use Network Sensor CloudFormation Template</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/option-2-network-sensor-ami/" class=" "><span class="subnav_list-text">Option 2: Use the Network Sensor AMI</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/option-3-network-sensor-installer/" class=" "><span class="subnav_list-text">Option 3: Use the Network Sensor Installer</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/complete-configuration-data-collection-management/" class=" "><span class="subnav_list-text">Complete Sensor Configuration in Insight Data Collection Management</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/configure-mirroring/" class=" "><span class="subnav_list-text">Configure Mirroring</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Use your Network Sensor<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-management/" class=" "><span class="subnav_list-text">Network Sensor Management Overview</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/using-your-network-sensor-data/" class=" "><span class="subnav_list-text">Use your Network Sensor Data</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Troubleshooting<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-troubleshooting/" class=" "><span class="subnav_list-text">Insight Network Sensor Troubleshooting</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Release Notes<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="https://docs.rapid7.com/release-notes/insightnetworksensor/" target="_blank" class=" external"><span class="subnav_list-text">Insight Network Sensor release notes<i class="r7-icon r7-icon-open-new-tab"></i></span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div></div></div></div><div class="flex nav-bar__column nav-bar__column--right toc__nav-bar"><a class="nav-bar__toggle " role="button">On This Page<span role="button"></span></a><div class="nav-bar__toggle-content"><nav class="toc toc--is-open" aria-label="Table of contents" style="position:sticky;opacity:1;transform:none"><div class="toc__toggle" role="button" title="Close table of contents"><span class="toc__toggle-text hide-collapsed">On This Page</span><span class="toc__toggle-icon"></span></div><ul class="hide-collapsed"><li class=""><a href="#deploy-network-sensors-at-points-of-network-traffic-convergence" class=""><span>Deploy Network Sensors at Points of Network Traffic Convergence</span></a></li><li class=""><a href="#multi-network-sensor-deployments" class=""><span>Multi-Network Sensor Deployments</span></a><ul><li><a href="#duplicate-data-limitations-of-the-network-sensor" class=""><span>Duplicate Data Limitations of the Network Sensor</span></a></li></ul></li><li class=""><a href="#handle-duplicate-data-with-the-berkeley-packet-filter-bpf" class=""><span>Handle Duplicate Data with the Berkeley Packet Filter (BPF)</span></a></li></ul></nav></div></div></div></div><div class="overlay" style="display:"></div></div><div class="container flex"><div class="sidebar-content"><div class="subnav"><div class="subnav_group"><div class="h3 subnav_group-title">Overview<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-overview/" class=" "><span class="subnav_list-text">Network Sensor Overview</span><span class="subnav_list-toggle plus"></span></a><div class="subnav_list-sub"><ul><li class="subnav_list-item"><a href="/sensor/benefits-of-the-insight-network-sensor/" class=" "><span class="subnav_list-text">Benefits of the Network Sensor</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/data-collected-by-the-insight-network-sensor/" class=" "><span class="subnav_list-text">Data Collected by the Network Sensor</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/how-insight-products-use-network-sensor-data/" class=" "><span class="subnav_list-text">How Insight Products Use Network Sensor Data</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Requirements<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-requirements/" class=" "><span class="subnav_list-text">Insight Network Sensor Requirements</span><span class="subnav_list-toggle plus"></span></a><div class="subnav_list-sub"><ul><li class="subnav_list-item"><a href="/sensor/network-sensor-host-system-requirements/" class=" "><span class="subnav_list-text">Network Sensor Host System Requirements</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/network-requirements-for-network-sensor-deployment/" class=" "><span class="subnav_list-text">Network Requirements for Network Sensor Deployment</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li><li class="subnav_list-item"><a href="/sensor/network-sensor-for-aws-requirements/" class=" "><span class="subnav_list-text">Network Sensor for AWS Requirements</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Deployment Guides<span class="subnav_list-toggle minus"></span></div><div><ul class="subnav_list"><li class="subnav_list-item subnav_list-item--open"><a href="/sensor/insight-network-sensor-deployment-guide/" class=" "><span class="subnav_list-text">Insight Network Sensor Deployment Guide</span><span class="subnav_list-toggle minus"></span></a><div class="subnav_list-sub"><ul><li class="subnav_list-item subnav_list-item--open"><a href="/sensor/step-1-network-sensor-location-guidelines/" class="active "><span class="subnav_list-text">Step 1: Network Sensor Location Guidelines</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-2-configure-a-network-traffic-source/" class=" "><span class="subnav_list-text">Step 2: Configure a Network Traffic Source</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-3-provision-a-network-sensor-host/" class=" "><span class="subnav_list-text">Step 3: Provision a Network Sensor Host</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-4-download-and-install-the-network-sensor-software/" class=" "><span class="subnav_list-text">Step 4: Download and Install the Network Sensor Software</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/step-5-configure-network-interface-details-in-the-insight-platform/" class=" "><span class="subnav_list-text">Step 5: Configure Network Interface Details in the Insight Platform</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li><li class="subnav_list-item"><a href="/sensor/network-sensor-for-aws-deployment-guide/" class=" "><span class="subnav_list-text">Network Sensor for AWS Deployment Guide</span><span class="subnav_list-toggle plus"></span></a><div class="subnav_list-sub"><ul><li class="subnav_list-item"><a href="/sensor/option-1-network-sensor-cloudformation/" class=" "><span class="subnav_list-text">Option 1: Use Network Sensor CloudFormation Template</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/option-2-network-sensor-ami/" class=" "><span class="subnav_list-text">Option 2: Use the Network Sensor AMI</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/option-3-network-sensor-installer/" class=" "><span class="subnav_list-text">Option 3: Use the Network Sensor Installer</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/complete-configuration-data-collection-management/" class=" "><span class="subnav_list-text">Complete Sensor Configuration in Insight Data Collection Management</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/configure-mirroring/" class=" "><span class="subnav_list-text">Configure Mirroring</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Use your Network Sensor<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-management/" class=" "><span class="subnav_list-text">Network Sensor Management Overview</span></a><div class="subnav_list-sub"><ul></ul></div></li><li class="subnav_list-item"><a href="/sensor/using-your-network-sensor-data/" class=" "><span class="subnav_list-text">Use your Network Sensor Data</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Troubleshooting<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="/sensor/insight-network-sensor-troubleshooting/" class=" "><span class="subnav_list-text">Insight Network Sensor Troubleshooting</span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div><div class="subnav_group"><div class="h3 subnav_group-title">Release Notes<span class="subnav_list-toggle plus"></span></div><div style="display:none"><ul class="subnav_list"><li class="subnav_list-item"><a href="https://docs.rapid7.com/release-notes/insightnetworksensor/" target="_blank" class=" external"><span class="subnav_list-text">Insight Network Sensor release notes<i class="r7-icon r7-icon-open-new-tab"></i></span></a><div class="subnav_list-sub"><ul></ul></div></li></ul></div></div></div></div><div class="main-content"><div class="inner-content"><div class="html-block"><h1 id="step-1-network-sensor-location-guidelines" class="page-title">Step 1: Network Sensor Location Guidelines<span title="Copy link to clipboard"></span></h1><p>Deciding where to locate an Insight Network Sensor in your environment is an important first step when undertaking any network sensor deployment procedure. This article introduces the key concept of network traffic convergence to help you pick the right deployment locations, offers guidelines for multi-network sensor deployments, and covers potential duplicate data scenarios.</p><h2 id="deploy-network-sensors-at-points-of-network-traffic-convergence">Deploy Network Sensors at Points of Network Traffic Convergence<span class="copy-btn" title="Copy link to clipboard"></span></h2><p>To ensure that all of your network traffic is fully covered by as few network sensors as possible, you need to focus your location decisions on areas of network traffic convergence.</p><p>While all networks vary in topology, scale, and segmentation, a typical network usually consists of at least one data center tied together with a core switch. By nature, core switches are ideal network traffic convergence zones, and Rapid7 recommends a mirror port-equipped core switch for your network sensor deployment for this very reason.</p><p>If your network is too small for a mirror port-equipped core switch, you can deploy Test Access Points (TAPs) inline between your internet gateway and your switch device to create your own network traffic convergence areas for the network sensor to use.</p><div class="block-callout info"><p>VMware includes powerful and flexible traffic mirroring functionality that allows you to easily deploy multiple sensors and monitor either internal east west traffic, traffic across multiple ESX servers, or external SPAN traffic. For additional detail and related video tutorials, check out <a href="/sensor/step-2-configure-a-network-traffic-source#section-virtual-traffic-sources">Virtual Traffic Sources</a>.</p></div><h2 id="multi-network-sensor-deployments">Multi-Network Sensor Deployments<span class="copy-btn" title="Copy link to clipboard"></span></h2><p>The following scenarios are typical cases for deploying multiple network sensors:</p><ul><li>If your overall network throughput figures exceed what a single network sensor can accommodate, you can deploy multiple network sensors to achieve complete coverage. The same network traffic convergence principle still applies in this scenario. However, as a general guideline, your network traffic monitoring deployment should strive to achieve full coverage with as few network sensors as possible.</li><li>If your organization consists of several remote data centers, deploying a network sensor for each is ideal for gaining visibility on their local activity.</li></ul><h3 id="duplicate-data-limitations-of-the-network-sensor">Duplicate Data Limitations of the Network Sensor<span class="copy-btn" title="Copy link to clipboard"></span></h3><p>When deploying multiple network sensors, take care to ensure that they do not ingest and process the same network traffic more than once. However, the network sensor does feature a packet filtering tool (covered in the next section) where you can tune what kinds of traffic each network sensor can monitor, and what kinds can be ignored.</p><h2 id="handle-duplicate-data-with-the-berkeley-packet-filter-bpf">Handle Duplicate Data with the Berkeley Packet Filter (BPF)<span class="copy-btn" title="Copy link to clipboard"></span></h2><p>Depending on your network configuration, sometimes the capture of duplicate data is unavoidable in a multi-network sensor environment. To mitigate against this condition, the network sensor includes a component called the Berkeley Packet Filter (BPF) that you can configure to ignore specific types of network traffic on a per-network sensor basis as needed.</p><div class="block-callout info"><h3 id="TIP" class="block-callout__title">TIP<span class="copy-btn" title="Copy link to clipboard"></span></h3><p>After you deploy one or more network sensors, you can configure any BPF settings in the <a href="/sensor/insight-network-sensor-management">network sensor management</a> experience of the Insight platform.</p></div></div><div class="feedback "><div class="feedback__title">Did this page help you?</div><button class="feedback__yes flex flex-ai-c"><img src="/Areas/Docs/includes/img/icon-thumbs-up.svg"/> Yes</button><button class="feedback__no flex flex-ai-c"><img src="/Areas/Docs/includes/img/icon-thumbs-up.svg"/> No</button></div><div class="postnav"><a href="/sensor/insight-network-sensor-deployment-guide" class="postnav__link prev"><div class="postnav__icon"><i class="r7-icon r7-icon-arrow-chevron-right"></i></div><div class="postnav__text"><div class="postnav__parent">Deployment Guides</div><div class="postnav__post">Insight Network Sensor Deployment Guide</div></div></a><a href="/sensor/step-2-configure-a-network-traffic-source" class="postnav__link next"><div class="postnav__text"><div class="postnav__parent">Deployment Guides</div><div class="postnav__post">Step 2: Configure a Network Traffic Source</div></div><div class="postnav__icon"><i class="r7-icon r7-icon-arrow-chevron-right"></i></div></a></div></div></div><aside class="gutter"><nav class="toc toc--is-open" aria-label="Table of contents" style="position:sticky;opacity:1;transform:none"><div class="toc__toggle" role="button" title="Close table of contents"><span class="toc__toggle-text hide-collapsed">On This Page</span><span class="toc__toggle-icon"></span></div><ul class="hide-collapsed"><li class=""><a href="#deploy-network-sensors-at-points-of-network-traffic-convergence" class=""><span>Deploy Network Sensors at Points of Network Traffic Convergence</span></a></li><li class=""><a href="#multi-network-sensor-deployments" class=""><span>Multi-Network Sensor Deployments</span></a><ul><li><a href="#duplicate-data-limitations-of-the-network-sensor" class=""><span>Duplicate Data Limitations of the Network Sensor</span></a></li></ul></li><li class=""><a href="#handle-duplicate-data-with-the-berkeley-packet-filter-bpf" class=""><span>Handle Duplicate Data with the Berkeley Packet Filter (BPF)</span></a></li></ul></nav></aside></div><div class="postnav-border"></div></div> </div> <footer class="footer"> <div class="container wrapper"> <section class="footer__links"> <div class="footer__links-wrapper"> <div class="footer__links-col"> <div class="footer__links-section footer__contact"> <a href="https://www.rapid7.com"> <img alt="Rapid7 logo" class="logo" 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an important first step when undertaking any network sensor deployment procedure. This article introduces the key concept of network traffic convergence to help you pick the right deployment locations, offers guidelines for multi-network sensor deployments, and covers potential duplicate data scenarios.\u003c/p\u003e\n\u003ch2 id=\u0022deploy-network-sensors-at-points-of-network-traffic-convergence\u0022\u003eDeploy Network Sensors at Points of Network Traffic Convergence\u003c/h2\u003e\n\u003cp\u003eTo ensure that all of your network traffic is fully covered by as few network sensors as possible, you need to focus your location decisions on areas of network traffic convergence.\u003c/p\u003e\n\u003cp\u003eWhile all networks vary in topology, scale, and segmentation, a typical network usually consists of at least one data center tied together with a core switch. By nature, core switches are ideal network traffic convergence zones, and Rapid7 recommends a mirror port-equipped core switch for your network sensor deployment for this very reason.\u003c/p\u003e\n\u003cp\u003eIf your network is too small for a mirror port-equipped core switch, you can deploy Test Access Points (TAPs) inline between your internet gateway and your switch device to create your own network traffic convergence areas for the network sensor to use.\u003c/p\u003e\n\u003cdiv class=\u0022block-callout info\u0022\u003e\u003cp\u003eVMware includes powerful and flexible traffic mirroring functionality that allows you to easily deploy multiple sensors and monitor either internal east west traffic, traffic across multiple ESX servers, or external SPAN traffic. For additional detail and related video tutorials, check out \u003ca href=\u0022/sensor/step-2-configure-a-network-traffic-source#section-virtual-traffic-sources\u0022\u003eVirtual Traffic Sources\u003c/a\u003e.\u003c/p\u003e\n\u003c/div\u003e\u003ch2 id=\u0022multi-network-sensor-deployments\u0022\u003eMulti-Network Sensor Deployments\u003c/h2\u003e\n\u003cp\u003eThe following scenarios are typical cases for deploying multiple network sensors:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eIf your overall network throughput figures exceed what a single network sensor can accommodate, you can deploy multiple network sensors to achieve complete coverage. The same network traffic convergence principle still applies in this scenario. However, as a general guideline, your network traffic monitoring deployment should strive to achieve full coverage with as few network sensors as possible.\u003c/li\u003e\n\u003cli\u003eIf your organization consists of several remote data centers, deploying a network sensor for each is ideal for gaining visibility on their local activity.\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch3 id=\u0022duplicate-data-limitations-of-the-network-sensor\u0022\u003eDuplicate Data Limitations of the Network Sensor\u003c/h3\u003e\n\u003cp\u003eWhen deploying multiple network sensors, take care to ensure that they do not ingest and process the same network traffic more than once. However, the network sensor does feature a packet filtering tool (covered in the next section) where you can tune what kinds of traffic each network sensor can monitor, and what kinds can be ignored.\u003c/p\u003e\n\u003ch2 id=\u0022handle-duplicate-data-with-the-berkeley-packet-filter-bpf\u0022\u003eHandle Duplicate Data with the Berkeley Packet Filter (BPF)\u003c/h2\u003e\n\u003cp\u003eDepending on your network configuration, sometimes the capture of duplicate data is unavoidable in a multi-network sensor environment. To mitigate against this condition, the network sensor includes a component called the Berkeley Packet Filter (BPF) that you can configure to ignore specific types of network traffic on a per-network sensor basis as needed.\u003c/p\u003e\n\u003cdiv class=\u0022block-callout info\u0022\u003e\u003ch3 id=\u0022TIP\u0022 class=\u0022block-callout__title\u0022\u003eTIP\u003c/h3\u003e\u003cp\u003eAfter you deploy one or more network sensors, you can configure any BPF settings in the \u003ca href=\u0022/sensor/insight-network-sensor-management\u0022\u003enetwork sensor management\u003c/a\u003e experience of the Insight platform.\u003c/p\u003e\n\u003c/div\u003e","metadata":{"title":"Step 1: Network Sensor Location Guidelines","excerpt":"Learn best practices for locating your Insight Network Sensor.","DateModified":null,"isHidden":false,"canonicalUrl":"http://docs.rapid7.com/sensor/step-1-network-sensor-location-guidelines"},"hasContent":true,"errorsList":[],"prevLink":{"text":"Insight Network 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