--- sourceDocument: Australia Operational Technology Management sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/operational-technology Release : - australia ft:locale : - en-US ft:publication_title : - Australia Operational Technology Management ft:clusterId : - optm bundleId : - optm workflow : - Technology --- # Operational Technology Network Map # Operational Technology Network Map {#ariaid-title1} Release version: Australia Updated March 12, 2026 ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 3 minutes to read Summarize ![AI sparkle icon](https://servicenow.com/docs/portal-asset/ai-sparkle-icon) Summarized using AI This content was generated using new OpenAI-powered functionality. Results are provided on an as is basis and are not guaranteed to be accurate or complete. ## Summary of Operational Technology Network Map The Operational Technology (OT) Network Map is an interactive tool that provides a real-time visualization of your OT network, displaying connections between devices and subnets within your industrial environment. This map enhances your ability to analyze network changes, identify risks, and make informed decisions regarding operations and security. Show full answer Show less ## Key Features * **Visual Representation:** Displays device connections and data flow, helping in understanding the OT network structure. * **Node Details:** Hovering over subnet nodes reveals information such as subnet name, number of critical devices, and total OT devices. Device nodes show device name, type, and criticality status. * **Map Refresh:** The map updates when the OT Network Map Cache Handler job runs, ensuring current data availability. * **Filters:** Users can apply filters based on class, criticality, manufacturer, Purdue level, and discovery source for tailored views. * **Legend:** Provides explanations for visual components of the map, enhancing user understanding. ## Key Outcomes By utilizing the OT Network Map, customers can transition from reactive troubleshooting to proactive decision-making, increase risk awareness, and improve visibility into complex network relationships. To effectively set up and utilize the map, run the OT Network Map Cache Handler scheduled job and ensure the necessary data is available in specified tables. ## Next Steps * Run the OT Network Map Cache Handler scheduled job. * Set the system property for the OT Network Map. * View and edit the OT Network Map as needed. The Operational Technology (OT) Network Map is an interactive map that visualizes your OT network through connected nodes. ## OT Network Map overview {#utilizing-ot-network-map__section_xyh_kj1_b3c} The OT Network Map provides a real‑time and accurate representation of your OT environment by modeling subnets and device‑to‑device connections across your industrial network. This visual map helps you understand how OT devices are connected and how data flows between them. With this visibility, you can analyze the impact of network changes, identify connectivity risks, and make informed operational and security decisions. It enables faster troubleshooting, improves risk awareness, and provides better visibility into complex OT network relationships. It helps you move from reactive troubleshooting to proactive decision‑making across your industrial environment. You can access the OT Network Map by navigating to Equipment Model Manager in the Industrial Workspace and selecting a site. The following image is an example of the network map in its default state. ## Node map representation {#utilizing-ot-network-map__section_m1y_rl1_b3c} The node at the center of the network map represents your equipment model entity site. Connected to the site, you can see the nodes that represent the site's subnets. On each subnet node, there's a number indicating how many OT devices exist within that subnet. When you select the device number on the subnet node, the network map expands to show all the device nodes within the subnet. Subnet node details When you hover over the subnet node, you can view the following information for that subnet: * Subnet name * Number of critical devices * Total number of OT devices * Managed Network name, if available {#utilizing-ot-network-map__ul_ixm_yvx_g3c} Device node details When you hover over the device node, you can view the following information for that device: * Device name * Device type * Criticality status {#utilizing-ot-network-map__ul_kfc_kwx_g3c} The device node also contains an option to view its device-to-device connections. For more information about device-to-device connections, see [OT device related items and related lists](https://servicenow-prod.fluidtopics.net/rlLv8K4xL7i1rBx~agv_yw "The All OT Devices, All OT Devices by IP Address, and All OT Devices by CI menu options contain several related items and lists.") and [View and edit device to device connections](https://servicenow-prod.fluidtopics.net/sNaY9SnokpNln7qzubBHTw "View and edit device-to-device connections for your Operational Technology (OT) devices using the Device to Device Connections list in the Industrial Workspace."). Map refresh When the OT Network Map Cache Handler scheduled job runs and the Refreshed at field in the map is updated with the new refresh time. For more information about the scheduled job, see [Run the OT Network Map Cache Handler scheduled job](https://servicenow-prod.fluidtopics.net/0Es9plXXDdMgm0bVkCY1tg "Configure this scheduled job to run after your Service Graph Connectors to populate the latest data to show in the OT Network Map."). ## Populating the map {#utilizing-ot-network-map__section_n4p_ynx_l3c} To populate the OT Network Map, you must run the OT Network Map Cache Handler scheduled job. For more information about the scheduled job, see [Run the OT Network Map Cache Handler scheduled job](https://servicenow-prod.fluidtopics.net/0Es9plXXDdMgm0bVkCY1tg "Configure this scheduled job to run after your Service Graph Connectors to populate the latest data to show in the OT Network Map."). The data must be available in the following tables for the network map to load properly. * IP Address \[cmdb_ci_ip_address\] * OT Discovered Subnet \[sn_ot_discovered_subnet\] {#utilizing-ot-network-map__ul_jrg_z4x_l3c} ## Map legend {#utilizing-ot-network-map__section_jn3_y22_h3c} The OT Network Map contains a legend that describes the visual components of the map and their meaning. The legend covers the relationship lines between nodes, the different nodes you may see in your network, and the device node criticality. The following image shows the map legend made available by selecting the Legend ![]() icon from node map control panel in the top-right corner. ## Map filters {#utilizing-ot-network-map__section_nr1_cm1_b3c} The following table contains the additional filters that you can apply to the OT Network Map for your equipment model entity.{#utilizing-ot-network-map__table_m1j_3n1_b3c__entry__2} | Filter | Description | |-|-| | Class | The name of the assigned class for the OT device. | | Criticality | The measure of the relative risk to the site process due to failure of the device. | | Manufacturer | The device manufacturer. | | Purdue level | The assigned Purdue level. Ranges 0--5. | | Discovery source | The Discovery source for the OT device data. | [Table 1. OT Network Map filters] {#utilizing-ot-network-map__table_m1j_3n1_b3c} ## Roles required {#utilizing-ot-network-map__section_grq_hl2_m3c} You must be assigned both the cmdb_ot_isa_viewer role and cmdb_ot_viewer role. ## Limitations of the network map {#utilizing-ot-network-map__section_qnc_hgm_k3c} The following list contains the limitations of the network map. * Subnets without any configuration items (CIs) don't show up in the network map. * CIs that aren't part of any subnet don't show up in the network map. * For a site with more than 10K CIs, only 10K CIs are considered in the OT network map calculations. {#utilizing-ot-network-map__ul_dql_hgm_k3c} ## What to do next {#utilizing-ot-network-map__section_dfk_3g2_h3c} * [Setting up the OT Network Map](https://servicenow-prod.fluidtopics.net/gQxQNU1jlNT~PoaWJ1Lxsw "Set up the Operational Technology (OT) Network Map so that you can access the map in the in the Industrial Workspace.") * [Run the OT Network Map Cache Handler scheduled job](https://servicenow-prod.fluidtopics.net/0Es9plXXDdMgm0bVkCY1tg "Configure this scheduled job to run after your Service Graph Connectors to populate the latest data to show in the OT Network Map.") * [Set the system property for the OT Network Map](https://servicenow-prod.fluidtopics.net/696Hcj_VBA~HSgYZ9rjTNw "Set the Max CI Nodes per Site (sn_ot_core.node_map.max_ci_nodes_per_site) system property to determine the maximum number of configuration item (CI) nodes shown per site on the OT Network Map.") {#utilizing-ot-network-map__ul_dv5_kg2_h3c} * [View and edit the OT Network Map](https://servicenow-prod.fluidtopics.net/BWwqRRmfiZBLwCK_aSyp6w "View and edit the Operational Technology (OT) Network Map in the Industrial Workspace to visualize your OT networks per site and their OT devices.") {#utilizing-ot-network-map__ul_p4s_jg2_h3c}