{"id":508,"date":"2018-10-26T22:01:52","date_gmt":"2018-10-26T22:01:52","guid":{"rendered":"http:\/\/feralpacket.org\/?p=508"},"modified":"2018-10-26T22:01:52","modified_gmt":"2018-10-26T22:01:52","slug":"inter-as-vpn-notes","status":"publish","type":"post","link":"https:\/\/feralpacket.org\/?p=508","title":{"rendered":"Inter-AS VPN Notes"},"content":{"rendered":"<p><span style=\"font-weight: bold;\">Inter-AS VPN<\/span><\/p>\n<p>\u00a0&#8211; VNPv4 communication between 2 ASs to exchange client routes<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/feralpacket.org\/wp-content\/uploads\/2018\/10\/8e9f1d42468a90fa8a66aadb80b9fd78.jpeg\" style=\"cursor: default; height: auto;\" width=\"600\" height=\"\"\/><\/p>\n<p>Problem<\/p>\n<p>\u00a0&#8211; Each client would require a separate L3 interface for the separate VRFs<\/p>\n<p>\u00a0 \u00a0 \u00a0-&gt; Subinterfaces are commonly used to solve this<\/p>\n<p>Client-to-client over multiple ASs must be a Labeled Switched Path (LSP), unless a VRF is being used somewhere in an AS<\/p>\n<p>Thee are three was to enable inter-AS communication<\/p>\n<p>\n\u00a0&#8211; Inter-AS Option (10) A<\/p>\n<p>\u00a0 \u00a0 \u00a0-&gt; Back-to-back VRF<\/p>\n<p>\u00a0&#8211; Inter-AS Option (10) B<\/p>\n<p>\u00a0 \u00a0 \u00a0-&gt; ASBR VPNv4 MP-eBGP<\/p>\n<p>\u00a0&#8211; Inter-AS Option (10) C<\/p>\n<p>\u00a0 \u00a0 \u00a0-&gt; Multihop MP-BGP<\/p>\n<p><span style=\"font-weight: bold;\">Cisco Docs:<\/span><\/p>\n<p>MPLS VPN Inter-AS IPv4 BGP Label Distribution<\/p>\n<p><a href=\"http:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/ios\/12_2s\/feature\/guide\/fsiaslbl.pdf\">http:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/ios\/12_2s\/feature\/guide\/fsiaslbl.pdf<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Inter-AS VPN<\/p>\n","protected":false},"author":1,"featured_media":507,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[43,32,31],"class_list":["post-508","post","type-post","status-publish","format-standard","hentry","category-ccie","tag-inter-as-vpn","tag-mpls","tag-published"],"_links":{"self":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/508","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=508"}],"version-history":[{"count":1,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/508\/revisions"}],"predecessor-version":[{"id":530,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/508\/revisions\/530"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/media\/507"}],"wp:attachment":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}