{"id":556,"date":"2018-10-26T22:12:26","date_gmt":"2018-10-26T22:12:26","guid":{"rendered":"http:\/\/feralpacket.org\/?p=556"},"modified":"2018-10-26T22:12:26","modified_gmt":"2018-10-26T22:12:26","slug":"vrf-lite-notes","status":"publish","type":"post","link":"https:\/\/feralpacket.org\/?p=556","title":{"rendered":"VRF Lite Notes"},"content":{"rendered":"<p><span style=\"font-weight: bold;\">VRF Lite<\/span><\/p>\n<p>\u00a0&#8211; VRF without MPLS<\/p>\n<p>\u00a0&#8211; Causes problems if used on CE routers<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/feralpacket.org\/wp-content\/uploads\/2018\/10\/ac3ea57b69dc819a910977aa727dd2fa.jpeg\" style=\"\" width=\"600\" height=\"\"\/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/feralpacket.org\/wp-content\/uploads\/2018\/10\/7d932c2e003b44ea295c97763822a3f2.jpeg\" style=\"\" width=\"600\" height=\"\"\/><\/p>\n<p>The down-bit is set in OSPF update, so R4 drops the update.<\/p>\n<p>Scenario -&gt; One branch of the customer is using VRF lite with OSPF as the PE &#8211; CE protocol. \u00a0The other branch is not using VRF.<\/p>\n<p>Problem, the VRF branch will not accept any updates from the other branch because of the down-bit.<\/p>\n<p>Solution #1<\/p>\n<p>\u00a0&#8211; Change the domain-id of any of the PE routers<\/p>\n<p>\u00a0 \u00a0 \u00a0-&gt; Routes will get exchanged as type 5 LSAs, the routes being External 2<\/p>\n<p>R1(config)# <span style=\"background-color: rgb(255, 250, 165);-evernote-highlight:true;\">router ospf 10 vrf c1b1<\/span><\/p>\n<p>\u00a0<span style=\"background-color: rgb(255, 250, 165);-evernote-highlight:true;\">domain-id 0.0.0.15<\/span><\/p>\n<p>Domain-id -&gt; preferable to &#8220;no router ospf 10 vrf c1b1&#8221;, &#8220;router ospf &lt;new process-id&gt; vrf c1b1&#8221;<\/p>\n<p>Solution #2<\/p>\n<p>\u00a0&#8211; On the CE router, disable down-bit checking on the VRF<\/p>\n<p>R4(config)# <span style=\"background-color: rgb(255, 250, 165);-evernote-highlight:true;\">router ospf 1<\/span><\/p>\n<p>\u00a0<span style=\"background-color: rgb(255, 250, 165);-evernote-highlight:true;\">capability vrf-lite<\/span><\/p>\n<p>capability vrf-lite<\/p>\n<p>\u00a0&#8211; You are not a PE router, don&#8217;t check the down-bit<\/p>\n","protected":false},"excerpt":{"rendered":"<p>VRF Lite<\/p>\n","protected":false},"author":1,"featured_media":554,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[31,44],"class_list":["post-556","post","type-post","status-publish","format-standard","hentry","category-ccie","tag-published","tag-vrf-lite"],"_links":{"self":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/556","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=556"}],"version-history":[{"count":2,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/556\/revisions"}],"predecessor-version":[{"id":606,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/556\/revisions\/606"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/media\/554"}],"wp:attachment":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}