{"id":17323,"date":"2019-08-19T21:46:12","date_gmt":"2019-08-20T02:46:12","guid":{"rendered":"http:\/\/bucktownbell.com\/?p=17323"},"modified":"2019-08-19T21:46:12","modified_gmt":"2019-08-20T02:46:12","slug":"how-malformed-packets-caused-centurylinks-37-hour-nationwide-outage","status":"publish","type":"post","link":"http:\/\/bucktownbell.com\/?p=17323","title":{"rendered":"How malformed packets caused CenturyLink\u2019s 37-hour, nationwide outage"},"content":{"rendered":"<blockquote><p>The switching module sent these malformed packets &#8220;as network management instructions to a line module,&#8221; and the packets &#8220;were delivered to all connected nodes,&#8221; the FCC said. Each node that received the packet then &#8220;retransmitted the packet to all its connected nodes.&#8221;<\/p><\/blockquote>\n<p>Source: <em><a href=\"https:\/\/arstechnica.com\/information-technology\/2019\/08\/centurylinks-37-hour-outage-blocked-911-service-for-17-million-people\/\">How malformed packets caused CenturyLink\u2019s 37-hour, nationwide outage | Ars Technica<\/a><\/em><\/p>\n<blockquote><p>But the outage continued because &#8220;the malformed packets continued to replicate and transit the network, generating more packets as they echoed from node to node,&#8221; the FCC wrote. Just after midnight, at least 20 hours after the problem began, CenturyLink engineers &#8220;began instructing nodes to no longer acknowledge the malformed packets.&#8221; They also &#8220;disabled the proprietary management channel, preventing it from further transmitting the malformed packets.&#8221;<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>The switching module sent these malformed packets &#8220;as network management instructions to a line module,&#8221; and the packets &#8220;were delivered to all connected nodes,&#8221; the FCC said. Each node that received the packet then &#8220;retransmitted the packet to all its &hellip; <a href=\"http:\/\/bucktownbell.com\/?p=17323\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[438,794,811],"class_list":["post-17323","post","type-post","status-publish","format-standard","hentry","category-networking","tag-configuration-management","tag-oops","tag-outage"],"_links":{"self":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/17323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17323"}],"version-history":[{"count":1,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/17323\/revisions"}],"predecessor-version":[{"id":17324,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/17323\/revisions\/17324"}],"wp:attachment":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17323"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}