{"id":3374,"date":"2012-01-24T00:45:54","date_gmt":"2012-01-24T00:45:54","guid":{"rendered":"http:\/\/www.wikisee.info\/?p=3374"},"modified":"2016-08-09T12:07:42","modified_gmt":"2016-08-09T12:07:42","slug":"ibgp-lab-redundant-link","status":"publish","type":"post","link":"https:\/\/wiki-see.info\/wp\/2012\/01\/24\/ibgp-lab-redundant-link\/","title":{"rendered":"IBGP LAB ROUTING – REDUNDANT LINK"},"content":{"rendered":"

Here is a Lab scenerio providing 3 router within an IBGP. Creating a primary and secondary redundant <\/span>
\nlink using local precedence<\/span> value<\/em> with route-map statement.<\/span><\/p>\n

R0<\/span> router is to be the primary link and R2<\/span> is the redundant link.
\nR1<\/span> is to tag routes going to\u00a0neighbor\u00a0R0<\/span> with a preference value of 200<\/span>, thus making it a primary link
\nsince the defaulf preference value is 100<\/span> and the highest pref set than 100<\/span> will become the main link<\/span>.<\/p>\n

RO<\/span><\/p>\n

interface Loopback0<\/span>
\n ip address 100.0.0.1 255.255.255.255<\/span>
\n!<\/span><\/p>\n

interface FastEthernet0\/0<\/span>
\n ip address 192.168.0.1 255.255.255.252<\/span>
\n!<\/span>
\ninterface FastEthernet0\/1<\/span>
\n ip address 192.168.0.5 255.255.255.252<\/span>
\n!<\/span>
\nrouter bgp 100<\/span>
\nno synchronization<\/span>
\nbgp log-neighbor-changes<\/span>
\nneighbor 1.1.1.1 remote-as 100<\/span>
\nneighbor 1.1.1.1 ebgp-multihop 2<\/span>
\nneighbor 1.1.1.1 update-source Loopback0<\/span>
\nneighbor 2.2.2.2 remote-as 100<\/span>
\nneighbor 2.2.2.2 ebgp-multihop 2<\/span>
\nneighbor 2.2.2.2 update-source Loopback0<\/span>
\nneighbor 192.168.0.2 remote-as 100<\/span>
\nneighbor 192.168.0.6 remote-as 100<\/span>
\nno auto-summary<\/span><\/p>\n

!<\/span>
\nip route 1.1.1.1 255.255.255.255 192.168.0.2<\/span>
\nip route 2.2.2.2 255.255.255.255 192.168.0.6<\/span>
\n!
\n<\/span> !<\/p>\n

R1<\/span><\/p>\n

interface Loopback1<\/span>
\nip address 1.1.1.1 255.255.255.255<\/span>
\n!<\/span>
\ninterface FastEthernet0\/0<\/span>
\nip address 192.168.0.2 255.255.255.252<\/span>
\n!<\/span>
\ninterface FastEthernet0\/1<\/span>
\nip address 192.168.0.9 255.255.255.252<\/span>
\n!<\/span><\/p>\n

router bgp 100<\/span>
\nno synchronization<\/span>
\n bgp log-neighbor-changes<\/span>
\n neighbor 2.2.2.2 remote-as 100<\/span>
\n neighbor 2.2.2.2 ebgp-multihop 2<\/span>
\n neighbor 2.2.2.2 update-source Loopback1<\/span>
\n neighbor 100.0.0.1 remote-as 100<\/span>
\n neighbor 100.0.0.1 ebgp-multihop 2<\/span>
\n neighbor 100.0.0.1 update-source Loopback1<\/span>
\n neighbor 192.168.0.1 remote-as 100
\n<\/span>neighbor 192.168.0.1 route-map<\/span>\u00a0P<\/span>REFERENCE<\/span>\u00a0in<\/span>
\n neighbor 192.168.0.10 remote-as 100<\/span>
\n no auto-summary<\/span>
\n!
\n<\/span>route-map<\/span>\u00a0P<\/span>REFERENCE<\/span>\u00a0permit<\/span> 10
\nset\u00a0local-preference 200<\/span>
\n<\/span>!<\/span>
\nip route 2.2.2.2 255.255.255.255 192.168.0.10<\/span>
\n ip route 100.0.0.1 255.255.255.255 192.168.0.1<\/span><\/p>\n

 <\/p>\n

R2<\/span><\/p>\n

interface Loopback2<\/span>
\n ip address 2.2.2.2 255.255.255.0<\/span>
\n!<\/span>
\ninterface FastEthernet0\/0<\/span>
\n ip address 192.168.0.6 255.255.255.252<\/span>
\n!<\/span>
\ninterface FastEthernet0\/1<\/span>
\nip address 192.168.0.10 255.255.255.252<\/span>
\n!<\/span>
\nrouter bgp 100<\/span>
\n no synchronization<\/span>
\n bgp log-neighbor-changes<\/span>
\n neighbor 1.1.1.1 remote-as 100<\/span>
\n neighbor 1.1.1.1 ebgp-multihop 2<\/span>
\n neighbor 1.1.1.1 update-source Loopback2<\/span>
\n neighbor 100.0.0.1 remote-as 100<\/span>
\n neighbor 100.0.0.1 ebgp-multihop 2<\/span>
\n neighbor 100.0.0.1 update-source Loopback2<\/span>
\n neighbor 192.168.0.5 remote-as 100<\/span>
\n neighbor 192.168.0.9 remote-as 100<\/span>
\n no auto-summary<\/span>
\n!<\/span>
\nip route 1.1.1.1 255.255.255.255 192.168.0.9<\/span>
\nip route 100.0.0.1 255.255.255.255 192.168.0.5<\/span><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Here is a Lab scenerio providing 3 router within an IBGP. Creating a primary and secondary redundant link using local precedence value with route-map statement. R0 router is to be the primary link and R2 is the redundant link. R1 is to tag routes going to\u00a0neighbor\u00a0R0 with a preference value of 200, thus making it […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[343],"class_list":["post-3374","post","type-post","status-publish","format-standard","hentry","category-bgp-2","tag-ibgp"],"_links":{"self":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts\/3374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/comments?post=3374"}],"version-history":[{"count":1,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts\/3374\/revisions"}],"predecessor-version":[{"id":4991,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts\/3374\/revisions\/4991"}],"wp:attachment":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/media?parent=3374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/categories?post=3374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/tags?post=3374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}