{"id":2585,"date":"2022-08-08T07:53:27","date_gmt":"2022-08-08T07:53:27","guid":{"rendered":"https:\/\/www.fibermall.com\/blog\/?p=2585"},"modified":"2022-12-16T06:01:08","modified_gmt":"2022-12-16T06:01:08","slug":"implementation-principles-of-soft-sdn-hard-sdn","status":"publish","type":"post","link":"https:\/\/www.fibermall.com\/blog\/soft-sdn-hard-sdn.htm","title":{"rendered":"Implementation Principles of Soft SDN\/Hard SDN"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fibermall.com\/blog\/soft-sdn-hard-sdn.htm\/#Classification_and_comparison_of_mainstream_DCN_SDN_solutions\" >Classification and comparison of mainstream\u00a0DCN SDN\u00a0solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fibermall.com\/blog\/soft-sdn-hard-sdn.htm\/#Comparison_of_Two_Overlay_Schemes\" >Comparison of Two Overlay Schemes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fibermall.com\/blog\/soft-sdn-hard-sdn.htm\/#Comparisons_between_the_HW_Soft_SDNHard_SDN\" >Comparisons between the HW Soft SDN\/Hard SDN<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fibermall.com\/blog\/soft-sdn-hard-sdn.htm\/#Conclusion\" >Conclusion:<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fibermall.com\/blog\/soft-sdn-hard-sdn.htm\/#Related_Posts\" >Related Posts<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Classification_and_comparison_of_mainstream_DCN_SDN_solutions\"><\/span><span style=\"font-size: 14pt;\"><strong><b>Classification and comparison of mainstream<\/b><\/strong><strong><b>\u00a0DCN SDN<\/b><\/strong><strong><b>\u00a0solutions<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<table id=\"tablepress-102\" class=\"tablepress tablepress-id-102 tbody-has-connected-cells\">\n<thead>\n<tr class=\"row-1\">\n\t<td class=\"column-1\"><\/td><th class=\"column-2\">HW Network<\/th><th class=\"column-3\">Cisco<\/th><th class=\"column-4\">ZTE<\/th><th class=\"column-5\">Juniper<\/th><th class=\"column-6\">Arista<br \/>\n\/HP (resale)<\/th><th class=\"column-7\">Brocade<\/th><th class=\"column-8\">HW IT<\/th><th class=\"column-9\">Nokia<\/th><th class=\"column-10\">VMware NSX<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Category of manufacturer<\/td><td colspan=\"6\" class=\"column-2\">Switch manufacturers<\/td><td colspan=\"3\" class=\"column-8\">Software manufacturers<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Category of SDN Solution<\/td><td colspan=\"3\" class=\"column-2\">Switch-based Overlay scheme<br \/>\n(Pure Hard Overlay or Hybrid Overlay)<\/td><td colspan=\"6\" class=\"column-5\">Server-based Overlay Scheme<br \/>\n(Pure Soft Overlay)<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">SDN products<\/td><td class=\"column-2\">AC<\/td><td class=\"column-3\">ACI<\/td><td class=\"column-4\">ZENIC<\/td><td class=\"column-5\">Juniper Contrail or VMware NSX<\/td><td class=\"column-6\">Nokia Nuage VSP or VMware NSX<\/td><td class=\"column-7\">VMware NSX<\/td><td class=\"column-8\">Neutron+<\/td><td class=\"column-9\">Nuage VSP<\/td><td class=\"column-10\">NSX<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Transponder Products<\/td><td class=\"column-2\">CE series switches, VSG\/Edumon series firewalls<\/td><td class=\"column-3\">Nexus Series Switches<\/td><td class=\"column-4\">hardware\uff1aM6000\uff0cBigMatrix 9900, 5960 TOR<br \/>\nsoftware\uff1aZXDVR\uff0cZXDVS\uff0cvFW<br \/>\n<\/td><td class=\"column-5\">QFX series switches, MX series routers<\/td><td class=\"column-6\">75\/73\/72\/71\/70 series switches<\/td><td class=\"column-7\">VDX series switches<\/td><td class=\"column-8\">Software: EVS (Enhanced OVS)<\/td><td class=\"column-9\">software\uff1aVRS<br \/>\nhardware\uff1aVSG 7850<\/td><td class=\"column-10\">Software: NSX set<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-102 from cache -->\n<p>Note:<\/p>\n<ol>\n<li>Cisco also has a VTS solution, a server-based overlay solution, but it is not the main one. It is mainly used in old scenarios (not Nexus 9K)<\/li>\n<li>Although Contrail, VSP, and NSX are primarily based on software overlay, they can also manage some hardware switches (the management functions of different manufacturers are limited).<\/li>\n<\/ol>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-2588 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Switch-based-Overlay-Solution-300x145.png\" alt=\"Switch-based Overlay Solution\" width=\"636\" height=\"307\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Switch-based-Overlay-Solution-300x145.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Switch-based-Overlay-Solution-1024x494.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Switch-based-Overlay-Solution-768x370.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Switch-based-Overlay-Solution.png 1139w\" sizes=\"(max-width: 636px) 100vw, 636px\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 10pt;\"><strong><b>Switch-based Overlay Solution<\/b><\/strong><\/span><\/p>\n<p><img decoding=\"async\" class=\"wp-image-2589 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Server-based-Overlay-Solution-300x152.png\" alt=\"Server-based Overlay Solution\" width=\"634\" height=\"321\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Server-based-Overlay-Solution-300x152.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Server-based-Overlay-Solution-1024x518.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Server-based-Overlay-Solution-768x388.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Server-based-Overlay-Solution.png 1108w\" sizes=\"(max-width: 634px) 100vw, 634px\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 10pt;\"><strong>Server-based Overlay Solution<\/strong><\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comparison_of_Two_Overlay_Schemes\"><\/span><span style=\"font-size: 14pt;\"><strong><b>Comparison of Two Overlay Schemes<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&nbsp;<\/p>\n<p><strong><b>Switch-based Overlay Solution<\/b><\/strong><\/p>\n<ul>\n<li>All Overlay functions are on the switch<\/li>\n<li>Easier to support various hypervisors and physical servers<\/li>\n<li>VXLAN wire-speed forwarding and low latency. Support SR-IOV-based NFV applications<\/li>\n<li>The O&amp;M management tools and protocols of physical switches are mature and standardized, and the image monitoring performance is good<\/li>\n<li>The server and network are operated and maintained separately to locate network faults better<\/li>\n<li>It is more suitable for newly built or partially reutilized manufacturers (Note: Interworking Gateway can be used to access traditional VLAN networks)<\/li>\n<\/ul>\n<p><strong><b>Server-based Overlay<\/b><\/strong><strong><b>\u00a0Solution<\/b><\/strong><\/p>\n<ul>\n<li>All Overlay functions are on the server<\/li>\n<li>Rely on Hypervisor, it is difficult to support all Hypervisors and physical servers<\/li>\n<li>When VXLAN is enabled on the vSwitch, the performance is greatly degraded<\/li>\n<li>The O&amp;M of vSwitch is not very mature, and there are not many tools or protocols such as SNMP, OAM, BFD, xFlow, and mirroring that are like physical devices.<\/li>\n<li>Network fault location is difficult because the server and network are coupled<\/li>\n<li>It is more suitable for the full-reutilized or OTT (Over The Top) scenario (the fabric of the data center is owned by a third party, such as AWS)<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Comparisons_between_the_HW_Soft_SDNHard_SDN\"><\/span><span style=\"font-size: 14pt;\"><strong><b>Comparison<\/b><\/strong><strong><b>s between the <\/b><\/strong><strong><b>HW Soft SDN\/Hard SDN <\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>HW&#8217;s two SDN Region control planes:<\/p>\n<p><img decoding=\"async\" class=\"wp-image-2590 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Region-Control-Plane-300x186.png\" alt=\"Soft SDN Region Control Plane\" width=\"675\" height=\"418\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Region-Control-Plane-300x186.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Region-Control-Plane.png 558w\" sizes=\"(max-width: 675px) 100vw, 675px\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">Soft SDN Region Control Plane<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2591 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Region-Control-Plane-300x152.png\" alt=\"Hard SDN Region Control Plane\" width=\"689\" height=\"349\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Region-Control-Plane-300x152.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Region-Control-Plane.png 638w\" sizes=\"(max-width: 689px) 100vw, 689px\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">Hard SDN Region Control Plane<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2592 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/HW-Soft-SDN-Model-300x181.png\" alt=\"HW Soft SDN (Model)\" width=\"624\" height=\"376\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">HW Soft SDN (Model)<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2593 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/HW-Hard-SDN-Model-300x171.png\" alt=\"HW Hard SDN (Model)\" width=\"630\" height=\"359\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">HW Hard SDN (Model)<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2594 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Control-Plane-Process-300x170.png\" alt=\"Soft SDN (Control Plane Process)\" width=\"639\" height=\"362\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Control-Plane-Process-300x170.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Control-Plane-Process-1024x581.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Control-Plane-Process-768x436.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-Control-Plane-Process.png 1212w\" sizes=\"(max-width: 639px) 100vw, 639px\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 10pt;\"><strong>Soft SDN (Control Plane Process)<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2595 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Control-Plane-Process-300x170.png\" alt=\"Hard SDN (Control Plane Process)\" width=\"651\" height=\"369\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Control-Plane-Process-300x170.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Control-Plane-Process-1024x580.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Control-Plane-Process-768x435.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-Control-Plane-Process.png 1234w\" sizes=\"(max-width: 651px) 100vw, 651px\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">Hard\u00a0SDN (Control Plane Process)<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2596 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-service-Traffic-300x176.png\" alt=\"Soft SDN (service Traffic)\" width=\"621\" height=\"364\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-service-Traffic-300x176.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-service-Traffic-1024x601.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-service-Traffic-768x451.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Soft-SDN-service-Traffic.png 1206w\" sizes=\"(max-width: 621px) 100vw, 621px\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">Soft SDN (service\u00a0Traffic)<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2597 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-service-Traffic-300x171.png\" alt=\"Hard SDN (service Traffic) \" width=\"643\" height=\"366\" srcset=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-service-Traffic-300x171.png 300w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-service-Traffic-1024x584.png 1024w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-service-Traffic-768x438.png 768w, https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Hard-SDN-service-Traffic.png 1220w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">Hard SDN\u00a0(service\u00a0Traffic)\u00a0<\/span><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2599 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Comparison-and-summary-of-HWs-two-SDNs-1-300x172.png\" alt=\"Comparison and summary of HW's two SDNs 1\" width=\"757\" height=\"434\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2600 aligncenter\" src=\"https:\/\/www.fibermall.com\/blog\/wp-content\/uploads\/2022\/08\/Comparison-and-summary-of-HWs-two-SDNs-2-300x47.png\" alt=\"Comparison and summary of HW's two SDNs 2\" width=\"758\" height=\"119\" \/><\/p>\n<p style=\"text-align: center;\"><strong><span style=\"font-size: 10pt;\">Comparison and summary of HW&#8217;s two SDNs<\/span><\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><span style=\"font-size: 14pt;\"><strong><b>Conclusion:<\/b><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Both soft SDN and hard SDN can meet the basic network capabilities of cloud data centers and support Layer 2 interworking across DCs. Here are the comparisons\u00a0of their differences:<\/p>\n<p><strong>Soft SDN:<\/strong><\/p>\n<ul>\n<li>Advantages<\/li>\n<\/ul>\n<p>Decoupled from hardware\u00a0and no vxlan<span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/www.fibermall.com\/blog\/overviewandapplication.htm\" target=\"_blank\" rel=\"noopener\"> switch<\/a><\/span> is required. Router\/LB\/vFW network equipment adopts software clustering<\/p>\n<p>multi-level Openstack architecture, which is flexible and easy to expand, suitable for large-scale scenarios<\/p>\n<ul>\n<li>Disadvantages<\/li>\n<\/ul>\n<p>In small-scale scenarios, the management node occupies more x86 devices<\/p>\n<p><strong>Hard SDN:<\/strong><\/p>\n<ul>\n<li>Advantages<\/li>\n<\/ul>\n<p>vxlan is encapsulated\/decapsulated on hardware network devices and has high forwarding performance (high throughput and low delay).<\/p>\n<ul>\n<li>Disadvantages<\/li>\n<\/ul>\n<p>It is Coupled\u00a0with network hardware devices, relying on hardware devices to support Vxlan, currently only commercialized with HW hardware devices;<\/p>\n<p>The application scenario is small-scale (2000 nodes).<\/p>\n<p>Note:<\/p>\n<p>The forwarding performance is lower than that of the hard SDN scenario. In fact, by improving the performance of virtual switches, such as DPDK, and bare metal services, the performance can be equal to that of hard SDN;<\/p>\n<p>HW Soft SDN has been commercialized by large-scale users on the public cloud, and it\u00a0can support up to 100,000 hosts and one million tenants.<\/p>\n<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        }\r\n        .lwrp .lwrp-list-multi-container{\r\n            display: flex;\r\n        }\r\n        .lwrp .lwrp-list-double{\r\n            width: 48%;\r\n        }\r\n        .lwrp .lwrp-list-triple{\r\n            width: 32%;\r\n        }\r\n        .lwrp .lwrp-list-row-container{\r\n            display: flex;\r\n            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