{"id":1122,"date":"2018-04-25T10:41:25","date_gmt":"2018-04-25T08:41:25","guid":{"rendered":"http:\/\/www.quisted.net\/?p=1120"},"modified":"2018-05-31T11:41:20","modified_gmt":"2018-05-31T11:41:20","slug":"dc-storage-networking","status":"publish","type":"post","link":"https:\/\/www.quisted.net\/index.php\/2018\/04\/25\/dc-storage-networking\/","title":{"rendered":"[DC] Storage Networking &#038; FibreChannel"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 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-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.quisted.net\/index.php\/2018\/04\/25\/dc-storage-networking\/#LAN_and_SAN_Separation\" >LAN and SAN Separation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.quisted.net\/index.php\/2018\/04\/25\/dc-storage-networking\/#LAN_vs_SAN_flow_control\" >LAN vs SAN flow control<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.quisted.net\/index.php\/2018\/04\/25\/dc-storage-networking\/#FibreChannel\" >FibreChannel<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"LAN_and_SAN_Separation\"><\/span><strong><span style=\"color: #993366;\">LAN and SAN Separation<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Security\u00a0 Ensures protection from hacking<\/li>\n<li>Bandwidth &#8211; SAN needs more bandwidth than LAN<\/li>\n<li>Flow Control &#8211; SAN is lossless and LAN is lossy\n<ul>\n<li>Ethernet Flow control ( LAN ):\n<ul>\n<li>Source transmits packets untill receiver buffer overflow, then sends a &#8220;Pause&#8221; frame<\/li>\n<li>Lost packets are retransmitted<\/li>\n<\/ul>\n<\/li>\n<li>Fibre Channel ( SAN ):\n<ul>\n<li>Credit based mechanism &#8211; Receiver has control<\/li>\n<li>Source does not send a frame until the receiver telsl the source it can receive a frame by sending &#8220;Ready&#8221; signal Back<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>Performance &#8211; SAN provides more performance than LAN enviorments<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"LAN_vs_SAN_flow_control\"><\/span><span style=\"color: #993366;\"><strong>LAN vs SAN flow control<br \/>\n<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Flow control is how data is controlled in a network<\/li>\n<li><strong>Ethernet Flow control ( LAN )<\/strong>\n<ul>\n<li>Source transmits packets until receiver buffers overflow, then sends a &#8220;Pause&#8221; frame<\/li>\n<li>Lost packets are retransmitted<\/li>\n<\/ul>\n<\/li>\n<li><strong>Fibre Channel ( SAN<\/strong> <strong>)<\/strong>\n<ul>\n<li>Credit based mechanism &#8211; Receiver has control<\/li>\n<li>Source does not send a frame until the receiver tells the source it can receive a frame by sending &#8220;Ready&#8221; signal back.<\/li>\n<li>&#8220;Lossless Fabric&#8221;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"FibreChannel\"><\/span><span style=\"color: #993366;\"><strong>FibreChannel<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>San Topologies\n<ul>\n<li><span style=\"color: #3366ff;\"><strong>Point-to-Point<\/strong><\/span>\n<ul>\n<li>Initiator (server) and Target (Storage) directly connected<\/li>\n<\/ul>\n<\/li>\n<li><span style=\"color: #3366ff;\"><strong>Arbitraded Loop (FC-AL) (Legacy)<\/strong><\/span>\n<ul>\n<li>Logical ring topology, similar to token ring<\/li>\n<li>Implies connection is required on the ring<\/li>\n<\/ul>\n<\/li>\n<li><span style=\"color: #3366ff;\"><strong>Switched Fabric ( FC-SW ) ( Standard)<\/strong><\/span>\n<ul>\n<li>Logical equivalent to a switched ethernet LAN<\/li>\n<li>Switches manage the fabric allowing any-to-any communication<\/li>\n<li>Support more than 16 million device addresses<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>FibreChannel Port types<\/strong>\n<ul>\n<li>N_port &#8211; Node Port<\/li>\n<li>NL_port &#8211; Node Loop Port<\/li>\n<li>F_port &#8211; Fabric Port<\/li>\n<li>FL_port &#8211; Fabric Loop Port<\/li>\n<li>E_port &#8211; Expansion Port ( ISL )<\/li>\n<li>TE_port &#8211; Trunking Expansion Port<\/li>\n<\/ul>\n<\/li>\n<li><strong>FC Addressing is analogous to IP over Ethernet<\/strong>\n<ul>\n<li>IP addresses are logical and manually assigned<\/li>\n<li>Ethernet MAC Addresses are physical and burned in<\/li>\n<li>FC World Wide Names ( <span style=\"color: #3366ff;\"><strong>WWNs<\/strong><\/span> )\u00a0 \/ <em>MAC \/ Zoning<br \/>\n<\/em><\/p>\n<ul>\n<li>8 byte address burned in by manufacturer<\/li>\n<li>Word Wide Node Name<\/li>\n<li>World Wide Port Name<\/li>\n<\/ul>\n<\/li>\n<li>FC Identifier ( <span style=\"color: #3366ff;\"><strong>FCID<\/strong><\/span> )\u00a0 \/ <em>IP \/ Routing<br \/>\n<\/em><\/p>\n<ul>\n<li>3 byte logical address assigned by fabric<\/li>\n<li>FCID is subdevided into three fields:\n<ul>\n<li><strong><span style=\"color: #ff6600;\">Domain ID<\/span><\/strong>\n<ul>\n<li>Each switch gets a domainID<\/li>\n<\/ul>\n<\/li>\n<li><span style=\"color: #ff6600;\"><strong>Area ID<\/strong><\/span>\n<ul>\n<li>Group of ports on a switch have an Area ID<\/li>\n<\/ul>\n<\/li>\n<li><span style=\"color: #ff6600;\"><strong>Port ID<\/strong><\/span>\n<ul>\n<li>End station connected to switch gets a Port ID<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>FibreChannel Nameserver ( FCNS)\n<ul>\n<li>analogous to ARP cache<\/li>\n<li>Used to resolve WWN ( pysical address ) to FCID ( logical address )<\/li>\n<li>Like FSPF, FCNS requires no configuration<\/li>\n<\/ul>\n<\/li>\n<li>FibreChannel Logins\n<ul>\n<li>Ethernet networks are connectionless<\/li>\n<li>Fibre Channel networks are connection oriented\n<ul>\n<li>All end stations must first register with the control plane of the fabric before sending any traffic.<\/li>\n<\/ul>\n<\/li>\n<li>Fabric Registration has three parts\n<ul>\n<li>Fabric Login ( FLOGI)<\/li>\n<li>Port Login ( PLOGI)<\/li>\n<li>Process Login ( PLRI )<\/li>\n<\/ul>\n<\/li>\n<li>sh flogi database<\/li>\n<li>sh fcns database<\/li>\n<\/ul>\n<\/li>\n<li>VSANs\n<ul>\n<li>Logical seperation of SAN traffic<\/li>\n<\/ul>\n<\/li>\n<li>Zoning\n<ul>\n<li>like an ACL in the IP world<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>LAN and SAN Separation Security\u00a0 Ensures protection from hacking Bandwidth &#8211; SAN needs more bandwidth than LAN Flow Control &#8211; SAN is lossless and LAN is lossy Ethernet Flow control ( LAN ): Source transmits packets untill receiver buffer overflow, then sends a &#8220;Pause&#8221; frame Lost packets are retransmitted Fibre Channel ( SAN ): Credit [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[3],"tags":[112,113,114,85],"class_list":["post-1122","post","type-post","status-publish","format-standard","hentry","category-dc","tag-fc","tag-fibrechannel","tag-port-types","tag-san"],"_links":{"self":[{"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/posts\/1122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/comments?post=1122"}],"version-history":[{"count":6,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/posts\/1122\/revisions"}],"predecessor-version":[{"id":1202,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/posts\/1122\/revisions\/1202"}],"wp:attachment":[{"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/media?parent=1122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/categories?post=1122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/tags?post=1122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}