{"id":5216,"date":"2023-08-26T03:31:50","date_gmt":"2023-08-26T03:31:50","guid":{"rendered":"https:\/\/www.fibermall.com\/blog\/?p=5216"},"modified":"2023-09-15T03:17:15","modified_gmt":"2023-09-15T03:17:15","slug":"any-difference-in-the-number-of-nodes-managed-by-the-subnet-manager-for-switch-ofed-and-ufm","status":"publish","type":"post","link":"https:\/\/www.fibermall.com\/questions\/switch-ofed-subnet-manager-and-ufm.htm","title":{"rendered":"Any Difference in the Number of Nodes Managed by the Subnet Manager for Switch, OFED, and UFM?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5216\" class=\"elementor elementor-5216\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1188f2b2 e-flex e-con-boxed e-con e-parent\" data-id=\"1188f2b2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1a6bc406 elementor-align-center elementor-widget elementor-widget-post-info\" data-id=\"1a6bc406\" data-element_type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-e5033fd elementor-inline-item\" itemprop=\"author\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-user-circle\" viewBox=\"0 0 496 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M248 104c-53 0-96 43-96 96s43 96 96 96 96-43 96-96-43-96-96-96zm0 144c-26.5 0-48-21.5-48-48s21.5-48 48-48 48 21.5 48 48-21.5 48-48 48zm0-240C111 8 0 119 0 256s111 248 248 248 248-111 248-248S385 8 248 8zm0 448c-49.7 0-95.1-18.3-130.1-48.4 14.9-23 40.4-38.6 69.6-39.5 20.8 6.4 40.6 9.6 60.5 9.6s39.7-3.1 60.5-9.6c29.2 1 54.7 16.5 69.6 39.5-35 30.1-80.4 48.4-130.1 48.4zm162.7-84.1c-24.4-31.4-62.1-51.9-105.1-51.9-10.2 0-26 9.6-57.6 9.6-31.5 0-47.4-9.6-57.6-9.6-42.9 0-80.6 20.5-105.1 51.9C61.9 339.2 48 299.2 48 256c0-110.3 89.7-200 200-200s200 89.7 200 200c0 43.2-13.9 83.2-37.3 115.9z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-author\">\n\t\t\t\t\t\t\t\t\t\tCatherine\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-b0a8dd8 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-calendar\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M12 192h424c6.6 0 12 5.4 12 12v260c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V204c0-6.6 5.4-12 12-12zm436-44v-36c0-26.5-21.5-48-48-48h-48V12c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v52H160V12c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v52H48C21.5 64 0 85.5 0 112v36c0 6.6 5.4 12 12 12h424c6.6 0 12-5.4 12-12z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>August 26, 2023<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-42774c2 elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-clock\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm0 448c-110.5 0-200-89.5-200-200S145.5 56 256 56s200 89.5 200 200-89.5 200-200 200zm61.8-104.4l-84.9-61.7c-3.1-2.3-4.9-5.9-4.9-9.7V116c0-6.6 5.4-12 12-12h32c6.6 0 12 5.4 12 12v141.7l66.8 48.6c5.4 3.9 6.5 11.4 2.6 16.8L334.6 349c-3.9 5.3-11.4 6.5-16.8 2.6z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-time\">\n\t\t\t\t\t\t\t\t\t\t<time>3:31 am<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7adcdedf elementor-widget elementor-widget-theme-post-excerpt\" data-id=\"7adcdedf\" data-element_type=\"widget\" data-widget_type=\"theme-post-excerpt.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\tThe switch subnet manager, the OFED subnet manager, and UFM are software that are used to initialize and manage switches and hosts in the InfiniBand network.\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5fb9b69e e-flex e-con-boxed e-con e-parent\" data-id=\"5fb9b69e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-10995f8c elementor-widget elementor-widget-heading\" data-id=\"10995f8c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-medium\">Subnet manager of switch, subnet manager of OFED, UFM, is there any difference in the number of management nodes of them? Which one is more suitable for clients to choose when deploying?<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1cba3541 e-flex e-con-boxed e-con e-child\" data-id=\"1cba3541\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-27b63935 elementor-widget elementor-widget-author-box\" data-id=\"27b63935\" data-element_type=\"widget\" data-widget_type=\"author-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-author-box\">\n\t\t\t\t\t\t\t<div  class=\"elementor-author-box__avatar\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/08\/Harry-Collins.jpg\" alt=\"Picture of Harry Collins\" loading=\"lazy\">\n\t\t\t\t<\/div>\n\t\t\t\n\t\t\t<div class=\"elementor-author-box__text\">\n\t\t\t\t\t\t\t\t\t<div >\n\t\t\t\t\t\t<h4 class=\"elementor-author-box__name\">\n\t\t\t\t\t\t\tHarry Collins\t\t\t\t\t\t<\/h4>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-author-box__bio\">\n\t\t\t\t\t\t<p>Answered on 3:31 am<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-22221d2e elementor-widget elementor-widget-text-editor\" data-id=\"22221d2e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-size: 14pt;\">The switch subnet manager, the OFED subnet manager, and UFM are software that are used to initialize and manage switches and hosts in the InfiniBand network. Their main difference lies in where they run and the scope of their functions.<\/span><\/p><p><span style=\"font-size: 14pt;\">The switch subnet manager is software that runs on the switch itself. It can automatically discover and configure devices in the network and provide basic network monitoring and diagnostic functions. It does not require additional management nodes, but it also does not support advanced network optimization and security functions.<\/span><\/p><p><span style=\"font-size: 14pt;\">The OFED subnet manager is software that runs on the host. It can use the subnet management service provided by OpenSM or Mellanox OFED. It can run on multiple hosts, achieving subnet manager redundancy and load balancing. It supports some advanced network functions, such as adaptive routing and congestion control, but it also does not support network security and preventive maintenance functions.<\/span><\/p><p><span style=\"font-size: 14pt;\">UFM is software that runs on dedicated management nodes. It is NVIDIA\u2019s unified network management platform. It can monitor and manage the InfiniBand network comprehensively, supporting various advanced network functions, such as adaptive routing, congestion control, network security, preventive maintenance, performance analysis, etc. It requires at least one management node and a UFM license.<\/span><\/p><p><span style=\"font-size: 14pt;\">Which one is more suitable for customers to choose depends on their needs and budgets. If customers only need basic network functions and do not want to add extra management nodes, they can choose the switch subnet manager. If customers need some advanced network functions and already have host nodes, they can choose the OFED subnet manager. If customers need the most comprehensive and advanced network functions and are willing to invest in dedicated management nodes and UFM licenses, they can choose UFM.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4c0de13f e-flex e-con-boxed e-con e-parent\" data-id=\"4c0de13f\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-26393a1f elementor-widget elementor-widget-heading\" data-id=\"26393a1f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">People Also Ask<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4fe0a11c elementor-posts--thumbnail-none elementor-grid-3 elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-card-shadow-yes elementor-posts__hover-gradient elementor-widget elementor-widget-posts\" data-id=\"4fe0a11c\" data-element_type=\"widget\" data-settings=\"{&quot;cards_columns&quot;:&quot;3&quot;,&quot;cards_columns_tablet&quot;:&quot;2&quot;,&quot;cards_columns_mobile&quot;:&quot;1&quot;,&quot;cards_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:35,&quot;sizes&quot;:[]},&quot;cards_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;cards_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"posts.cards\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-cards elementor-grid\" role=\"list\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20899 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-wdm-plc-splitter\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/ccwdm-vs-cwdm.htm\"  target=\"_blank\">\n\t\t\t\tCCWDM vs CWDM: When Compact CWDM Actually Pays Off\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>A CCWDM (Compact CWDM) module performs the same wavelength multiplexing and demultiplexing functions as a conventional CWDM module, but uses a more compact optical architecture. By integrating thin-film filters into<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-author\">\n\t\t\tFelisac\t\t<\/span>\n\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 13, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20914 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-networking\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/nvidia\/rocev2-config-guide.htm\"  target=\"_blank\">\n\t\t\t\tNVIDIA RoCEv2 Configuration Guide: Mastering Spectrum-4, ConnectX, and Spectrum-X End-to-End Lossless Networking\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Building a high-performance AI cluster requires more than powerful GPUs and high-speed Ethernet switches. Network congestion, packet loss, and inconsistent RDMA configurations can significantly reduce distributed training efficiency. NVIDIA RoCEv2&nbsp;enables<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-author\">\n\t\t\tCatherine\t\t<\/span>\n\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 13, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20906 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-dac-aoc-cables\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/dac-cable-vs-optical-module.htm\"  target=\"_blank\">\n\t\t\t\tDAC Cable vs Optical Module: Reach, Power, and Cost per Link\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>A DAC cable is usually the better choice for short, fixed data center links under about 3 m, where cost, power consumption, and latency are important considerations. An optical module<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-author\">\n\t\t\tCatherine\t\t<\/span>\n\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 13, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20889 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-wdm-plc-splitter\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/cwdm-distance.htm\"  target=\"_blank\">\n\t\t\t\tCWDM Distance Limits: How Far CWDM Can Reach\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>How far can CWDM transmit? The answer depends on the data rate, operating wavelength, optical power budget, fiber characteristics, and passive component losses. Typical CWDM transceiver specifications cover a wide<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-author\">\n\t\t\tCatherine\t\t<\/span>\n\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 12, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20881 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-dac-aoc-cables\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/passive-vs-active-dac-cable.htm\"  target=\"_blank\">\n\t\t\t\tPassive vs Active DAC Cable: Reach, Power &amp; When to Use\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Passive and active DAC cables both transmit electrical signals over shielded twinax copper. The key difference is how they handle signal degradation. Passive DAC cables rely on the host SerDes<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-author\">\n\t\t\tFiberMall\t\t<\/span>\n\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 12, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20869 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-wdm-plc-splitter\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/cwdm-oadm-guide.htm\" >\n\t\t\t\tCWDM OADM: Add-Drop Design Guide for Ring Networks\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>A CWDM OADM adds and drops selected wavelengths at an intermediate site while all other channels continue along the express path without being dropped or converted. Use one when one<\/p>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-author\">\n\t\t\tBrian\t\t<\/span>\n\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 11, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5be200fa elementor-align-center elementor-widget elementor-widget-button\" data-id=\"5be200fa\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/questions.htm\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Read More Questions<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6020fad6 e-flex e-con-boxed e-con e-child\" data-id=\"6020fad6\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-543482d2 elementor-widget elementor-widget-heading\" data-id=\"543482d2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Related Articles<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1adb4a47 elementor-grid-3 elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-posts--thumbnail-top elementor-card-shadow-yes elementor-posts__hover-gradient elementor-widget elementor-widget-posts\" data-id=\"1adb4a47\" data-element_type=\"widget\" data-settings=\"{&quot;cards_columns&quot;:&quot;3&quot;,&quot;cards_columns_tablet&quot;:&quot;2&quot;,&quot;cards_columns_mobile&quot;:&quot;1&quot;,&quot;cards_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:35,&quot;sizes&quot;:[]},&quot;cards_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;cards_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"posts.cards\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-cards elementor-grid\" role=\"list\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-6073 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-fiber-optic-transceivers\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/800g-sr8-400g-sr4-test-report.htm\" tabindex=\"-1\"  target=\"_blank\"><div class=\"elementor-post__thumbnail\"><img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"183\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/10\/800g-sr8-300x183.png\" class=\"attachment-medium size-medium wp-image-6080\" alt=\"800g sr8 and 400g sr4\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/10\/800g-sr8-300x183.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2023\/10\/800g-sr8.png 643w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/800g-sr8-400g-sr4-test-report.htm\"  target=\"_blank\">\n\t\t\t\t800G\u00a0SR8 and 400G SR4\u00a0Optical Transceiver Modules Compatibility and Interconnection Test Report\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Version Change Log Writer V0 Sample Test Cassie Test Purpose Test Objects\uff1a800G OSFP SR8\/400G OSFP SR4\/400G Q112 SR4. By conducting corresponding tests, the test parameters meet the relevant industry standards,<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/800g-sr8-400g-sr4-test-report.htm\" aria-label=\"Read more about 800G\u00a0SR8 and 400G SR4\u00a0Optical Transceiver Modules Compatibility and Interconnection Test Report\" tabindex=\"-1\"  target=\"_blank\">\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tOctober 18, 2023\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20899 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-wdm-plc-splitter\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/ccwdm-vs-cwdm.htm\" tabindex=\"-1\"  target=\"_blank\"><div class=\"elementor-post__thumbnail\"><img decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-vs-CCWDM-300x200.png\" class=\"attachment-medium size-medium wp-image-20900\" alt=\"CWDM vs CCWDM\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-vs-CCWDM-300x200.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-vs-CCWDM-768x512.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-vs-CCWDM.png 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/ccwdm-vs-cwdm.htm\"  target=\"_blank\">\n\t\t\t\tCCWDM vs CWDM: When Compact CWDM Actually Pays Off\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>A CCWDM (Compact CWDM) module performs the same wavelength multiplexing and demultiplexing functions as a conventional CWDM module, but uses a more compact optical architecture. By integrating thin-film filters into<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/ccwdm-vs-cwdm.htm\" aria-label=\"Read more about CCWDM vs CWDM: When Compact CWDM Actually Pays Off\" tabindex=\"-1\"  target=\"_blank\">\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 13, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20914 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-networking\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/nvidia\/rocev2-config-guide.htm\" tabindex=\"-1\"  target=\"_blank\"><div class=\"elementor-post__thumbnail\"><img decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/NVIDIA-RoCEv2-300x200.png\" class=\"attachment-medium size-medium wp-image-20915\" alt=\"NVIDIA RoCEv2\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/NVIDIA-RoCEv2-300x200.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/NVIDIA-RoCEv2-768x512.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/NVIDIA-RoCEv2.png 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/nvidia\/rocev2-config-guide.htm\"  target=\"_blank\">\n\t\t\t\tNVIDIA RoCEv2 Configuration Guide: Mastering Spectrum-4, ConnectX, and Spectrum-X End-to-End Lossless Networking\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Building a high-performance AI cluster requires more than powerful GPUs and high-speed Ethernet switches. Network congestion, packet loss, and inconsistent RDMA configurations can significantly reduce distributed training efficiency. NVIDIA RoCEv2&nbsp;enables<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/nvidia\/rocev2-config-guide.htm\" aria-label=\"Read more about NVIDIA RoCEv2 Configuration Guide: Mastering Spectrum-4, ConnectX, and Spectrum-X End-to-End Lossless Networking\" tabindex=\"-1\"  target=\"_blank\">\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 13, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20906 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-dac-aoc-cables\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/dac-cable-vs-optical-module.htm\" tabindex=\"-1\"  target=\"_blank\"><div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/dac-cable-vs-optical-module-300x200.png\" class=\"attachment-medium size-medium wp-image-20907\" alt=\"dac cable vs optical module\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/dac-cable-vs-optical-module-300x200.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/dac-cable-vs-optical-module-768x512.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/dac-cable-vs-optical-module.png 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/dac-cable-vs-optical-module.htm\"  target=\"_blank\">\n\t\t\t\tDAC Cable vs Optical Module: Reach, Power, and Cost per Link\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>A DAC cable is usually the better choice for short, fixed data center links under about 3 m, where cost, power consumption, and latency are important considerations. An optical module<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/dac-cable-vs-optical-module.htm\" aria-label=\"Read more about DAC Cable vs Optical Module: Reach, Power, and Cost per Link\" tabindex=\"-1\"  target=\"_blank\">\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 13, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20889 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-wdm-plc-splitter\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/cwdm-distance.htm\" tabindex=\"-1\"  target=\"_blank\"><div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-distance-300x200.jpg\" class=\"attachment-medium size-medium wp-image-20895\" alt=\"CWDM distance\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-distance-300x200.jpg 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-distance-768x512.jpg 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/CWDM-distance.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/cwdm-distance.htm\"  target=\"_blank\">\n\t\t\t\tCWDM Distance Limits: How Far CWDM Can Reach\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>How far can CWDM transmit? The answer depends on the data rate, operating wavelength, optical power budget, fiber characteristics, and passive component losses. Typical CWDM transceiver specifications cover a wide<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/cwdm-distance.htm\" aria-label=\"Read more about CWDM Distance Limits: How Far CWDM Can Reach\" tabindex=\"-1\"  target=\"_blank\">\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 12, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20881 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-dac-aoc-cables\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/passive-vs-active-dac-cable.htm\" tabindex=\"-1\"  target=\"_blank\"><div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/passive-vs-active-dac-cable-300x200.jpg\" class=\"attachment-medium size-medium wp-image-20897\" alt=\"passive vs active dac cable\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/passive-vs-active-dac-cable-300x200.jpg 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/passive-vs-active-dac-cable-768x512.jpg 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/passive-vs-active-dac-cable.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/passive-vs-active-dac-cable.htm\"  target=\"_blank\">\n\t\t\t\tPassive vs Active DAC Cable: Reach, Power &amp; When to Use\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Passive and active DAC cables both transmit electrical signals over shielded twinax copper. The key difference is how they handle signal degradation. Passive DAC cables rely on the host SerDes<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/passive-vs-active-dac-cable.htm\" aria-label=\"Read more about Passive vs Active DAC Cable: Reach, Power &amp; When to Use\" tabindex=\"-1\"  target=\"_blank\">\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 12, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-20869 post type-post status-publish format-standard has-post-thumbnail hentry category-blog category-wdm-plc-splitter\" role=\"listitem\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/www.fibermall.com\/blog\/cwdm-oadm-guide.htm\" tabindex=\"-1\" ><div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/cwdm-oadm-300x200.jpg\" class=\"attachment-medium size-medium wp-image-20870\" alt=\"cwdm oadm\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/cwdm-oadm-300x200.jpg 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/cwdm-oadm-768x512.jpg 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2026\/11\/cwdm-oadm.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.fibermall.com\/blog\/cwdm-oadm-guide.htm\" >\n\t\t\t\tCWDM OADM: Add-Drop Design Guide for Ring Networks\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>A CWDM OADM adds and drops selected wavelengths at an intermediate site while all other channels continue along the express path without being dropped or converted. Use one when one<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/www.fibermall.com\/blog\/cwdm-oadm-guide.htm\" aria-label=\"Read more about CWDM OADM: Add-Drop Design Guide for Ring Networks\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tNovember 11, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<style>\r\n\r\n        .lwrp.link-whisper-related-posts{\r\n            \r\n            margin-top: 40px;\nmargin-bottom: 30px;\r\n        }\r\n        .lwrp .lwrp-title{\r\n            \r\n            \r\n        }\r\n        .lwrp .lwrp-description{\r\n            \r\n            \r\n\r\n        }\r\n        .lwrp .lwrp-list-container{\r\n        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<\/div>\r\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The switch subnet manager, the OFED subnet manager, and UFM are software that are used to initialize and manage switches and hosts in the InfiniBand network.<\/p>\n","protected":false},"author":227,"featured_media":5226,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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This site is optimized with the Yoast SEO Premium plugin v20.13 (Yoast SEO v25.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Difference in Subnet Manager for Switch, OFED and UFM | FiberMall<\/title>\n<meta name=\"description\" content=\"The switch subnet manager, the OFED subnet manager, and UFM are software that are used to initialize and manage switches and hosts in the InfiniBand network.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fibermall.com\/questions\/switch-ofed-subnet-manager-and-ufm.htm\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Any Difference in the Number of Nodes Managed by the Subnet Manager for Switch, OFED, and UFM?\" \/>\n<meta property=\"og:description\" content=\"The switch subnet manager, the OFED subnet manager, and 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