{"id":423,"date":"2018-10-26T21:44:32","date_gmt":"2018-10-26T21:44:32","guid":{"rendered":"http:\/\/feralpacket.org\/?p=423"},"modified":"2018-10-26T21:44:32","modified_gmt":"2018-10-26T21:44:32","slug":"carrier-support-carrier-csc-notes","status":"publish","type":"post","link":"https:\/\/feralpacket.org\/?p=423","title":{"rendered":"Carrier Support Carrier (CSC) Notes"},"content":{"rendered":"

\\ Carrier Support Carrier (CSC)<\/span><\/p>\n

<\/p>\n

ISP1<\/p>\n

\u00a0– Main ISP<\/p>\n

\u00a0 \u00a0 \u00a0-> Core ISP<\/p>\n

ISP2<\/p>\n

\u00a0– Second level ISP<\/p>\n

\u00a0 \u00a0 \u00a0-> Tier 2 ISP<\/p>\n

Clients<\/p>\n

\u00a0– Connected to ISP2<\/p>\n

1. ISP1 provides L3VPN connection to ISP2<\/p>\n

2. Because of this connection, ISP2 PE routers can ping each other loopback to loopback<\/p>\n

3. VPNv4 neighbors between ISP2 PE routers require end-to-end Labeled Switch Path (LSP)<\/p>\n

4. The LSP is missing on VRF links of ISP1<\/p>\n

\u00a0 \u00a0 \u00a0-> CSC-PE to CSC-CE<\/p>\n

5. To activate LSP, there are two options<\/p>\n

\u00a0– If CSC-PE to \u00a0CSC-CE protocol is IGP<\/p>\n

\u00a0 \u00a0 \u00a0-> IGP + label<\/p>\n

\u00a0– If CSC-PE to CSC-CE protocol is eBGP<\/p>\n

\u00a0 \u00a0 \u00a0-> eBGP + label<\/p>\n

6. For VRF interfaces, if LSP is required, then the only option on XR routers is eBGP<\/p>\n

Configuring CSC<\/span><\/p>\n

\u00a01. Configure ISP1 with L3VPN<\/p>\n

\u00a02. Enable communication between ISP2 PE routers<\/p>\n

\u00a03. Configure “label processing” between ISP1 and ISP2<\/p>\n

\u00a04. Configure L3VPN between ISP2 PE routers<\/p>\n

\u00a05. Enable communication between client routers by CSC-CE to CE configuration<\/p>\n

\u00a06. In case ISP1 and ISP2 has XR routers, then two things to remember<\/p>\n

\u00a0– Static route is needed for next-hop IP address between ASBRs<\/p>\n

\u00a0– Only eBGP supported as VRF + label protocol<\/p>\n

<\/p>\n

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

router rip<\/span><\/span><\/p>\n


\n\u00a0version 2<\/span><\/span><\/p>\n

\u00a0network 1.0.0.0<\/span><\/span><\/p>\n

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

router bgp 200<\/span><\/span><\/p>\n

\u00a0address-family ipv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0 network 2.2.2.2\/32<\/span><\/span><\/span><\/p>\n

\u00a0 allocate-label all<\/span><\/span><\/p>\n

\u00a0neighbor 23.0.0.3<\/span><\/span><\/span><\/p>\n

\u00a0 remote-as 100<\/span><\/span><\/p>\n


\n\u00a0 address-family ipv4 labeled-unicast<\/span><\/span><\/p>\n


\n\u00a0\u00a0 route-policy allow-all in<\/span><\/span><\/p>\n


\n\u00a0\u00a0 route-policy allow-all out<\/span><\/span><\/p>\n


\nroute-policy allow-all<\/span><\/span><\/p>\n


\n\u00a0pass<\/span><\/span><\/p>\n


\n\u00a0end<\/span><\/span><\/p>\n


\nrouter static<\/span><\/span><\/p>\n

\u00a0address-family ipv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0 23.0.0.3\/32 gi0\/0\/0\/1<\/span><\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

router bgp 200<\/span><\/span><\/p>\n

\u00a0address-family vpnv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0neighbor 7.7.7.7<\/span><\/span><\/span><\/p>\n

\u00a0 remote-as 200<\/span><\/span><\/p>\n


\n\u00a0 update-source lo0<\/span><\/span><\/p>\n


\n\u00a0 address-family vpnv4 unicast<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

vrf DEF<\/span><\/span><\/p>\n


\n\u00a0address-family ipv4 unicast<\/span><\/span><\/p>\n


\n\u00a0 export route-target 2:2<\/span><\/span><\/p>\n


\n\u00a0 import route-target 2:2<\/span><\/span><\/p>\n


\nrouter bgp 200<\/span><\/span><\/p>\n


\n\u00a0vrf DEF<\/span><\/span><\/p>\n

\u00a0 rd 2:2<\/span><\/span><\/span><\/p>\n

int gi0\/0\/0\/0<\/span><\/span><\/span><\/p>\n

\u00a0no ipv4 address 12.0.0.2 255.255.255.0<\/span><\/span><\/p>\n

\u00a0vrf DEF<\/span><\/span><\/p>\n

\u00a0ipv4 address 12.0.0.2 255.255.255.0<\/span><\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

router rip<\/span><\/span><\/p>\n

\u00a0vrf DEF<\/span><\/span><\/span><\/p>\n

\u00a0 int gi0\/0\/0\/0<\/span><\/span><\/span><\/p>\n

\u00a0 redistribute bgp 200<\/span><\/span><\/p>\n


\nrouter bgp 200<\/span><\/span><\/p>\n


\n\u00a0vrf DEF<\/span><\/span><\/p>\n


\n\u00a0 address-family ipv4 unicast<\/span><\/span><\/p>\n

\u00a0\u00a0 redistribute rip<\/span><\/span><\/p>\n

! R3<\/span><\/span><\/p>\n

mpls ldp<\/span><\/span><\/p>\n

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

\u00a0router-id 3.3.3.3<\/span><\/span><\/span><\/p>\n

\u00a0mpls ldp auto-config<\/span><\/span><\/p>\n


\n\u00a0area 0<\/span><\/span><\/p>\n


\n\u00a0 int lo0<\/span><\/span><\/p>\n


\n\u00a0 int gi0\/0\/0\/1<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

vrf ABC<\/span><\/span><\/p>\n


\n\u00a0address-family ipv4 unicast<\/span><\/span><\/p>\n


\n\u00a0 export route-target 1:1<\/span><\/span><\/p>\n


\n\u00a0 import route-target 1:1<\/span><\/span><\/p>\n

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

\u00a0bgp router-id 3.3.3.3<\/span><\/span><\/span><\/p>\n

\u00a0vrf ABC<\/span><\/span><\/p>\n

\u00a0 rd 1:1<\/span><\/span><\/span><\/p>\n

int gi0\/0\/0\/0<\/span><\/span><\/span><\/p>\n

\u00a0no ipv4 address 23.0.0.3 255.255.255.0<\/span><\/span><\/p>\n

\u00a0vrf ABC<\/span><\/span><\/p>\n

\u00a0ipv4 address 23.0.0.3 255.255.255.0<\/span><\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

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


\n\u00a0address-family vpnv4 unicast<\/span><\/span><\/p>\n


\n\u00a0vrf ABC<\/span><\/span><\/p>\n


\n\u00a0 address-family ipv4 unicast<\/span><\/span><\/p>\n


\n\u00a0\u00a0 redistribute connected<\/span><\/span><\/p>\n

\u00a0\u00a0 allocate-label all<\/span><\/span><\/span><\/p>\n

\u00a0 neighbor 23.0.0.2<\/span><\/span><\/span><\/p>\n

\u00a0\u00a0 remote-as 200<\/span><\/span><\/p>\n


\n\u00a0\u00a0 address-family ipv4 labeled-unicast<\/span><\/span><\/p>\n


\n\u00a0\u00a0\u00a0 route-policy allow-all in<\/span><\/span><\/p>\n


\n\u00a0\u00a0\u00a0 route-policy allow-all out<\/span><\/span><\/p>\n


\n\u00a0\u00a0\u00a0 as-override<\/span><\/span><\/p>\n


\nroute-policy allow-all<\/span><\/span><\/p>\n


\n\u00a0pass<\/span><\/span><\/p>\n


\n\u00a0end<\/span><\/span><\/p>\n


\nrouter static<\/span><\/span><\/p>\n


\n\u00a0vrf ABC<\/span><\/span><\/p>\n

\u00a0 address-family ipv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0\u00a0 23.0.0.2\/32 gi0\/0\/0\/1<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

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

\u00a0neighbor 6.6.6.6<\/span><\/span><\/p>\n


\n\u00a0 remote-as 100<\/span><\/span><\/p>\n


\n\u00a0 update-source lo0<\/span><\/span><\/p>\n


\n\u00a0 address-family vpnv4 unicast<\/span><\/span><\/p>\n

! R4<\/span><\/span><\/p>\n

mpls ldp<\/span><\/span><\/p>\n


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


\n\u00a0router-id 4.4.4.4<\/span><\/span><\/p>\n


\n\u00a0mpls ldp auto-config<\/span><\/span><\/p>\n


\n\u00a0area 0<\/span><\/span><\/p>\n

\u00a0 int lo0<\/span><\/span><\/span><\/p>\n

\u00a0 int gi0\/0\/0\/0<\/span><\/span><\/span><\/p>\n

\u00a0 int gi0\/0\/0\/1<\/span><\/span><\/span><\/p>\n

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

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

! R5<\/span><\/span><\/p>\n

mpls label protocol ldp<\/span><\/span><\/p>\n


\nmpls ldp router-id lo0 force<\/span><\/span><\/p>\n


\nint lo0<\/span><\/span><\/p>\n


\n\u00a0ip ospf 1 area 0<\/span><\/span><\/p>\n


\nint e1\/0<\/span><\/span><\/p>\n

\u00a0ip ospf 1 area 0<\/span><\/span><\/p>\n

int e1\/1<\/span><\/span><\/p>\n

\u00a0ip ospf 1 area 0<\/span><\/span><\/p>\n

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

\u00a0router-id 5.5.5.5<\/span><\/span><\/span><\/p>\n

\u00a0mpls ldp autoconfig<\/span><\/span><\/p>\n

! R6<\/span><\/span><\/p>\n

mpls label protocol ldp<\/span><\/span><\/p>\n


\nmpls ldp router-id lo0 force<\/span><\/span><\/p>\n


\nint lo0<\/span><\/span><\/p>\n

\u00a0ip ospf 1 area 0<\/span><\/span><\/p>\n

int e1\/0<\/span><\/span><\/p>\n

\u00a0ip ospf 1 area 0<\/span><\/span><\/p>\n


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


\n\u00a0router-id 6.6.6.6<\/span><\/span><\/p>\n


\n\u00a0mpls ldp autoconfig<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

vrf definition ABC<\/span><\/span><\/p>\n


\n\u00a0rd 1:1<\/span><\/span><\/p>\n


\n\u00a0address-family ipv4<\/span><\/span><\/p>\n


\n\u00a0 route-target both 1:1<\/span><\/span><\/p>\n


\nint e1\/1<\/span><\/span><\/p>\n


\n\u00a0vrf forwarding ABC<\/span><\/span><\/p>\n

\u00a0ip address 67.0.0.6 255.255.255.0<\/span><\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

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


\n\u00a0bgp router-id 6.6.6.6<\/span><\/span><\/p>\n


\n\u00a0no bgp default ipv4-unicast<\/span><\/span><\/p>\n


\n\u00a0address-family ipv4 vrf ABC<\/span><\/span><\/p>\n

\u00a0 neighbor 67.0.0.7 remote-as 200<\/span><\/span><\/span><\/p>\n

\u00a0 neighbor\u00a0<\/span><\/span>67.0.0.7<\/span> activate<\/span><\/span><\/span><\/p>\n

\u00a0 neighbor\u00a0<\/span><\/span>67.0.0.7<\/span> as-override<\/span><\/span><\/span><\/p>\n

\u00a0 neighbor\u00a0<\/span><\/span>67.0.0.7<\/span> send-label<\/span><\/span><\/span><\/p>\n

\u00a0 redistribute connected<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

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

\u00a0neighbor\u00a03.3.3.3 remote-as 100<\/span><\/span><\/span><\/p>\n

\u00a0neighbor 3.3.3.3 update-source lo0<\/span><\/span><\/span><\/p>\n

\u00a0address-family vpnv4<\/span><\/span><\/p>\n

\u00a0 neighbor 3.3.3.3 activate<\/span><\/span><\/span><\/p>\n

\u00a0 neighbor 3.3.3.3 send-community extended<\/span><\/span><\/p>\n

! R7<\/span><\/span><\/p>\n

router bgp 200<\/span><\/span><\/p>\n

\u00a0address-family ipv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0 network 7.7.7.7\/32<\/span><\/span><\/span><\/p>\n

\u00a0 allocate-label all<\/span><\/span><\/p>\n

\u00a0neighbor 67.0.0.6<\/span><\/span><\/span><\/p>\n

\u00a0 remote-as 100<\/span><\/span><\/p>\n


\n\u00a0 address-family ipv4 labeled-unicast<\/span><\/span><\/p>\n


\n\u00a0\u00a0 route-policy allow-all in<\/span><\/span><\/p>\n


\n\u00a0\u00a0 route-policy allow-all out<\/span><\/span><\/p>\n


\nroute-policy allow-all<\/span><\/span><\/p>\n


\n\u00a0pass<\/span><\/span><\/p>\n


\n\u00a0end<\/span><\/span><\/p>\n


\nrouter static<\/span><\/span><\/p>\n

\u00a0address-family ipv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0 67.0.0.6\/32 gi0\/0\/0\/1<\/span><\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

router bgp 200<\/span><\/span><\/p>\n

\u00a0address-family vpnv4 unicast<\/span><\/span><\/span><\/p>\n

\u00a0neighbor 2.2.2.2<\/span><\/span><\/span><\/p>\n

\u00a0 remote-as 200<\/span><\/span><\/p>\n


\n\u00a0 update-source lo0<\/span><\/span><\/p>\n


\n\u00a0 address-family vpnv4 unicast<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

vrf DEF<\/span><\/span><\/p>\n


\n\u00a0address-family ipv4 unicast<\/span><\/span><\/p>\n


\n\u00a0 export route-target 2:2<\/span><\/span><\/p>\n


\n\u00a0 import route-target 2:2<\/span><\/span><\/p>\n


\nrouter bgp 200<\/span><\/span><\/p>\n


\n\u00a0vrf DEF<\/span><\/span><\/p>\n

\u00a0 rd 2:2<\/span><\/span><\/span><\/p>\n

int gi0\/0\/0\/0<\/span><\/span><\/span><\/p>\n

\u00a0no ipv4 address 78.0.0.7 255.255.255.0<\/span><\/span><\/p>\n

\u00a0vrf DEF<\/span><\/span><\/span><\/p>\n

\u00a0ipv4 address 78.0.0.7 255.255.255.0<\/span><\/span><\/p>\n

!<\/span><\/span><\/p>\n

router rip<\/span><\/span><\/p>\n

\u00a0vrf DEF<\/span><\/span><\/span><\/p>\n

\u00a0 int gi0\/0\/0\/0<\/span><\/span><\/span><\/p>\n

\u00a0 redistribute bgp 200<\/span><\/span><\/p>\n


\nrouter bgp 200<\/span><\/span><\/p>\n


\n\u00a0vrf DEF<\/span><\/span><\/p>\n


\n\u00a0 address-family ipv4 unicast<\/span><\/span><\/p>\n


\n\u00a0\u00a0 redistribute rip<\/span><\/span><\/p>\n

! R8<\/span><\/span><\/p>\n

router rip<\/span><\/span><\/p>\n

\u00a0version 2<\/span><\/span><\/span><\/p>\n

\u00a0network 78.0.0.0<\/span><\/span><\/span><\/p>\n

\u00a0network 8.0.0.0<\/span><\/span><\/span><\/p>\n

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

Verification:<\/span><\/span><\/p>\n

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

sh rip database<\/span><\/p>\n

sh ip route rip<\/span><\/p>\n

ping 8.8.8.8<\/span><\/p>\n

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

sh bgp ipv4 labeled-unicast sum<\/span><\/p>\n

sh bgp ipv4 labeled-unicast<\/span><\/p>\n

sh route bgp<\/span><\/p>\n

sh route static<\/span><\/p>\n

ping 7.7.7.7<\/span><\/p>\n

sh bgp vpnv4 u sum<\/span><\/p>\n

sh bgp vpnv4 u<\/span><\/p>\n

sh vrf DEF detail<\/span><\/p>\n

sh rip vrf DEF database<\/span><\/p>\n

! R3<\/span><\/p>\n

sh ospf int bri<\/span><\/p>\n

sh ospf nei<\/span><\/p>\n

sh route ospf<\/span><\/p>\n

sh mpls int<\/span><\/p>\n

sh mpls ldp nei bri<\/span><\/p>\n

sh mpls ldp dis<\/span><\/p>\n

sh vrf ABC detail<\/span><\/p>\n

sh bgp vrf ABC ipv4 labeled-unicast sum<\/span><\/p>\n

sh bgp vrf ABC ipv4 labeled-unicast<\/span><\/p>\n

sh route vrf ABC static<\/span><\/p>\n

sh bgp vpnv4 u sum<\/span><\/p>\n

sh bgp vpnv4 u<\/span><\/p>\n

sh route vrf ABC bgp<\/span><\/p>\n

sh mpls forwarding<\/span><\/p>\n

! R4<\/span><\/p>\n

sh ospf int bri<\/span><\/p>\n

sh ospf nei<\/span><\/p>\n

sh route ospf<\/span><\/p>\n

sh mpls int<\/span><\/p>\n

sh mpls ldp nei bri<\/span><\/p>\n

sh mpls ldp dis<\/span><\/p>\n

! R5<\/span><\/p>\n

sh ip ospf int bri<\/span><\/p>\n

sh ip ospf nei<\/span><\/p>\n

sh ip route ospf<\/span><\/p>\n

sh mpls int<\/span><\/p>\n

sh mpls ldp nei<\/span><\/p>\n

sh mpls ldp dis<\/span><\/p>\n

! R6<\/span><\/p>\n

sh ip ospf int bri<\/span><\/p>\n

sh ip ospf nei<\/span><\/p>\n

sh ip route ospf<\/span><\/p>\n

sh mpls int<\/span><\/p>\n

sh mpls ldp nei<\/span><\/p>\n

sh mpls ldp dis<\/span><\/p>\n

sh vrf detail<\/span><\/p>\n

sh bgp vrf ABC all sum<\/span><\/p>\n

sh bgp vrf ABC all<\/span><\/p>\n

sh bgp vpnv4 u all sum<\/span><\/p>\n

sh bgp vpnv4 u all<\/span><\/p>\n

sh mpls forwarding<\/span><\/p>\n

! R7<\/span><\/p>\n

sh bgp ipv4 labeled-unicast sum<\/span><\/p>\n

sh bgp ipv4 labeled-unicast<\/span><\/p>\n

sh route bgp<\/span><\/p>\n

sh route static<\/span><\/p>\n

ping 2.2.2.2<\/span><\/p>\n

sh bgp vpnv4 u sum<\/span><\/p>\n

sh bgp vpnv4 u<\/span><\/p>\n

sh vrf DEF detail<\/span><\/p>\n

sh rip vrf DEF database<\/span><\/p>\n

! R8<\/span><\/p>\n

sh rip database<\/span><\/p>\n

sh ip route rip<\/span><\/p>\n

ping 1.1.1.1<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\\ Carrier Support Carrier (CSC)<\/p>\n","protected":false},"author":1,"featured_media":421,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[34,32,31],"class_list":["post-423","post","type-post","status-publish","format-standard","hentry","category-ccie","tag-csc","tag-mpls","tag-published"],"_links":{"self":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/423","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=423"}],"version-history":[{"count":2,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/423\/revisions"}],"predecessor-version":[{"id":446,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/423\/revisions\/446"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/media\/421"}],"wp:attachment":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}