{"id":430,"date":"2018-10-26T22:28:54","date_gmt":"2018-10-26T22:28:54","guid":{"rendered":"http:\/\/feralpacket.org\/?p=430"},"modified":"2018-10-26T22:28:54","modified_gmt":"2018-10-26T22:28:54","slug":"bidirectional-forwarding-detection-bfd-notes","status":"publish","type":"post","link":"https:\/\/feralpacket.org\/?p=430","title":{"rendered":"Bidirectional Forwarding Detection (BFD) Notes"},"content":{"rendered":"

Bidirectional Forwarding Detection (BFD)<\/span><\/p>\n

\u00a0– It can check the connection status between two layer 3 devices in the periods of\u00a0milliseconds\u00a0and inform the upper layer routing protocol to take action<\/p>\n

\u00a0– Supported protocols<\/p>\n

\u00a0 \u00a0 \u00a0-> OSPF<\/p>\n

\u00a0 \u00a0 \u00a0-> IS-IS<\/p>\n

\u00a0 \u00a0 \u00a0-> EIGRP<\/p>\n

\u00a0 \u00a0 \u00a0-> BGP<\/p>\n

Configuration<\/span><\/p>\n

\u00a0– Keepalive parameters<\/p>\n

\u00a0 \u00a0 \u00a0-> Sending \/ receiving frequency<\/p>\n

\u00a0 \u00a0 \u00a0-> Multiplier<\/p>\n

\u00a0– Associating it with routing protocols<\/p>\n

int s0\/0<\/span><\/p>\n

\u00a0bfd interval <ms> min-rc <ms> multiplier <number><\/span><\/p>\n

EIGRP<\/p>\n

router eigrp 1<\/span><\/p>\n

\u00a0bfd { interface <int> | all-interfaces }<\/span><\/p>\n

OSPF<\/p>\n

router ospf 1<\/span><\/p>\n

\u00a0bfd all-interfaces<\/span><\/p>\n

\u00a0 \u00a0 \u00a0– or –<\/p>\n

int s0\/0<\/span><\/p>\n

\u00a0ip ospf bfd [disabled]<\/span><\/p>\n

IS-IS<\/p>\n

router isis ABC<\/span><\/p>\n

\u00a0bdf all-interfaces<\/span><\/p>\n

\u00a0 \u00a0 \u00a0– or –<\/p>\n

int s0\/0<\/span><\/p>\n

\u00a0isis bfd [disable]<\/span><\/p>\n

BGP<\/p>\n

router bgp 100<\/span><\/p>\n

\u00a0neighbor <ip add> fall-over bfd<\/span><\/p>\n

sh bfd neighbors<\/span><\/p>\n

sh bfd neighbors detail<\/span><\/p>\n

BFD only works if both sides are configured<\/p>\n","protected":false},"excerpt":{"rendered":"

Bidirectional Forwarding Detection (BFD)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[37,31],"class_list":["post-430","post","type-post","status-publish","format-standard","hentry","category-ccie","tag-bfd","tag-published"],"_links":{"self":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=430"}],"version-history":[{"count":1,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/430\/revisions"}],"predecessor-version":[{"id":704,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/430\/revisions\/704"}],"wp:attachment":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}