{"id":288,"date":"2017-09-22T09:57:56","date_gmt":"2017-09-22T07:57:56","guid":{"rendered":"http:\/\/www.quisted.net\/?p=288"},"modified":"2017-09-22T09:57:56","modified_gmt":"2017-09-22T07:57:56","slug":"bgp-as-path","status":"publish","type":"post","link":"https:\/\/www.quisted.net\/index.php\/2017\/09\/22\/bgp-as-path\/","title":{"rendered":"BGP AS Path"},"content":{"rendered":"<ul>\n<li><span style=\"color: #ff00ff;\">Multiple path attributes<\/span> to determine the <span style=\"color: #3366ff;\">best path<\/span> for a <span style=\"color: #008000;\">certain prefix.<\/span><\/li>\n<li>When no <span style=\"color: #ff00ff;\">path attributes<\/span> are set, BGP uses the <span style=\"color: #ff6600;\">AS_PATH<\/span> to determine the best route.\n<ul>\n<li>Shortest AS path wins<\/li>\n<\/ul>\n<\/li>\n<li><span style=\"color: #ff6600;\">AS_SEQ<\/span> is the component of the <span style=\"color: #ff6600;\">AS_PATH<\/span> attribute.\n<ul>\n<li><span style=\"color: #008000;\">10.10.10.0\/24<\/span> <strong>20<\/strong> <span style=\"color: #ff6600;\">10<\/span>\n<ul>\n<li><span style=\"color: #ff6600;\">AS-SEQ (in order)<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>With summarization:<\/strong>\n<ul>\n<li><span style=\"color: #008000;\">10.10.0.0\/16<\/span> <strong><span style=\"color: #ff6600;\">20<\/span><\/strong> <span style=\"color: #ff6600;\">10<\/span> <span style=\"color: #ff0000;\">{ 1 2 5 4 3 }\u00a0\u00a0 <\/span><\/li>\n<li><span style=\"color: #ff0000;\"><span style=\"color: #008000;\">Prefix<\/span> <strong><span style=\"color: #ff6600;\">AS-PATH <\/span><\/strong><span style=\"color: #ff6600;\">AS-SEQ<\/span>\u00a0 { AS-SET }\u00a0<\/span>\n<ul>\n<li>AS-SET are not in order<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>Prevents Routing loops.<\/li>\n<li>If a BGP router received an update with it&#8217;s own AS#, <strong>it indicates a loop<\/strong>.<\/li>\n<li>If a BGP router received an update with it&#8217;s own AS#, <strong>it drops the route.<\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Multiple path attributes to determine the best path for a certain prefix. When no path attributes are set, BGP uses the AS_PATH to determine the best route. Shortest AS path wins AS_SEQ is the component of the AS_PATH attribute. 10.10.10.0\/24 20 10 AS-SEQ (in order) With summarization: 10.10.0.0\/16 20 10 { 1 2 5 4 [&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":[12,8],"tags":[],"class_list":["post-288","post","type-post","status-publish","format-standard","hentry","category-bgp","category-route"],"_links":{"self":[{"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/posts\/288","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=288"}],"version-history":[{"count":0,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/posts\/288\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/media?parent=288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/categories?post=288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.quisted.net\/index.php\/wp-json\/wp\/v2\/tags?post=288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}