{"id":1121,"date":"2021-02-10T21:23:43","date_gmt":"2021-02-10T21:23:43","guid":{"rendered":"https:\/\/dft.wiki\/?p=1121"},"modified":"2021-03-14T18:32:22","modified_gmt":"2021-03-14T18:32:22","slug":"spanning-tree-protocol-stp-in-cisco-devices","status":"publish","type":"post","link":"https:\/\/dft.wiki\/?p=1121","title":{"rendered":"Spanning Tree Protocol (STP) on Cisco Devices"},"content":{"rendered":"<p>Types:<\/p>\n<ul>\n<li>STP Standard<\/li>\n<li>PVST+ (STP per VLAN &#8211; by Cisco)<\/li>\n<li>RSTP (STP faster)<\/li>\n<li>Rapid PVST+ (RSTP per VLAN &#8211; by Cisco)<\/li>\n<\/ul>\n<p>Root Bridge election:<\/p>\n<ul>\n<li>BID = (Priority+VLAN) + MAC\n<ul>\n<li>Lowest Priority;<\/li>\n<li>Lowest VLAN;<\/li>\n<li>Lowest MAC.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Commands:<\/p>\n<pre>spanning-tree mode pvst\r\nspanning-tree mode rapid-pvst\r\nspanning-tree mode mst\r\nspanning-tree vlan <strong>1<\/strong> root primary  # VLAN number <strong>1<\/strong>-4094\r\nspanning-tree vlan 1 priority <strong>0<\/strong>    # priority <strong>0<\/strong>-61440\r\n                                   # default 32768\r\n                                   # set increments of 4096\r\nspanning-tree portfast             # directly to forwarding mode\r\nspanning-tree uplinkfast           # accelerate new root port\r\nno spanning-tree vlan <strong>1<\/strong>            # VLAN number <strong>1<\/strong>-4094<\/pre>\n<p>Debugging commands:<\/p>\n<pre>show spanning-tree\r\nshow spanning-tree vlan <strong>1<\/strong> root     # LAN number <strong>1<\/strong>-4094\r\nshow spanning-tree vlan <strong>1<\/strong> bridge   # LAN number <strong>1<\/strong>-4094<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Types: STP Standard PVST+ (STP per VLAN &#8211; by Cisco) RSTP (STP faster) Rapid PVST+ [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1121","post","type-post","status-publish","format-standard","hentry","category-ccna"],"_links":{"self":[{"href":"https:\/\/dft.wiki\/index.php?rest_route=\/wp\/v2\/posts\/1121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dft.wiki\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dft.wiki\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dft.wiki\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dft.wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1121"}],"version-history":[{"count":2,"href":"https:\/\/dft.wiki\/index.php?rest_route=\/wp\/v2\/posts\/1121\/revisions"}],"predecessor-version":[{"id":1425,"href":"https:\/\/dft.wiki\/index.php?rest_route=\/wp\/v2\/posts\/1121\/revisions\/1425"}],"wp:attachment":[{"href":"https:\/\/dft.wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dft.wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dft.wiki\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}