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​PE-CE Routing with OSPv2

Picture



CSR1
router ospf 100 vrf C1
 redistribute bgp 100 subnets
 network 101.1.8.0 0.0.0.255 area 0
 network 101.1.17.0 0.0.0.255 area 0
!
router bgp 100
 address-family ipv4 vrf C1
  redistribute ospf 100 match internal external 1 external 2
 exit-address-family

CSR5
router ospf 100 vrf C1
 redistribute bgp 100 subnets
 network 101.5.18.0 0.0.0.255 area 0
!
router bgp 100
 address-family ipv4 vrf C1
  redistribute ospf 100 match internal external 1 external 2
 exit-address-family

XR13
router ospf 100
 vrf C1
  redistribute bgp 100
  area 0
   interface GigabitEthernet0/0/0/1
!
router bgp 100
 vrf C1
  rd 100:1
  address-family ipv4 unicast
   redistribute ospf 100 match internal external


CSR8
router ospf 1
 network 10.101.8.0 0.0.0.255 area 0
 network 101.1.8.0 0.0.0.255 area 0



IOS17
router ospf 1
 network 10.101.17.0 0.0.0.255 area 0
 network 101.1.17.0 0.0.0.255 area 0


IOS18
router ospf 1
 network 10.101.18.0 0.0.0.255 area 0
 network 101.5.18.0 0.0.0.255 area 0


IOS19
router ospf 1
 network 10.101.19.0 0.0.0.255 area 0
 network 101.13.19.0 0.0.0.255 area 0



CSR1#show bgp vpnv4 unicast all 10.101.19.19/32
BGP routing table entry for 100:1:10.101.19.19/32, version 1615
Paths: (2 available, best #2, table C1)
  Not advertised to any peer
  Refresh Epoch 1
  Local
    192.0.2.13 (metric 40) (via default) from 192.0.2.9 (192.0.2.9)
      Origin incomplete, metric 2, localpref 100, valid, internal
      Extended Community: OSPF DOMAIN ID:0x0005:0x000000640200 
        RT:192.0.2.13:1 OSPF RT:0.0.0.0:1:0 OSPF ROUTER ID:192.0.2.13:0
      Originator: 192.0.2.13, Cluster list: 192.0.2.9
      mpls labels in/out nolabel/24014
      rx pathid: 0, tx pathid: 0
  Refresh Epoch 5
  Local
    192.0.2.13 (metric 40) (via default) from 192.0.2.3 (192.0.2.3)
      Origin incomplete, metric 2, localpref 100, valid, internal, best
      Extended Community: OSPF DOMAIN ID:0x0005:0x000000640200 
        RT:192.0.2.13:1 OSPF RT:0.0.0.0:1:0 OSPF ROUTER ID:192.0.2.13:0
      Originator: 192.0.2.13, Cluster list: 192.0.2.3
      mpls labels in/out nolabel/24014
      rx pathid: 0, tx pathid: 0x0




RP/0/0/CPU0:XR13#show bgp vrf C1 ipv4 unicast 10.101.8.8/32
Mon Sep 23 04:49:48.141 UTC
BGP routing table entry for 10.101.8.8/32, Route Distinguisher: 100:1
Versions:
  Process           bRIB/RIB  SendTblVer
  Speaker                291         291
Last Modified: Sep 23 03:56:17.347 for 00:53:30
Paths: (2 available, best #1)
  Not advertised to any peer
  Path #1: Received by speaker 0
  Not advertised to any peer
  Local
    192.0.2.1 (metric 40) from 192.0.2.3 (192.0.2.1)
      Received Label 75
      Origin incomplete, metric 2, localpref 100, valid, internal, best, group-best, import-candidate, imported
      Received Path ID 0, Local Path ID 1, version 291
      Extended community: OSPF domain-id:0x5:0x000000640200 OSPF route-type:0:2:0x0 OSPF router-id:101.1.17.1 RT:192.0.2.1:1 
      Originator: 192.0.2.1, Cluster list: 192.0.2.3
      Source AFI: VPNv4 Unicast, Source VRF: C1, Source Route Distinguisher: 100:1
  Path #2: Received by speaker 0
  Not advertised to any peer
  Local
    192.0.2.1 (metric 40) from 192.0.2.9 (192.0.2.1)
      Received Label 75
      Origin incomplete, metric 2, localpref 100, valid, internal, import-candidate, imported
      Received Path ID 0, Local Path ID 0, version 0
      Extended community: OSPF domain-id:0x5:0x000000640200 OSPF route-type:0:2:0x0 OSPF router-id:101.1.17.1 RT:192.0.2.1:1 
      Originator: 192.0.2.1, Cluster list: 192.0.2.9
      Source AFI: VPNv4 Unicast, Source VRF: C1, Source Route Distinguisher: 100:1




CSR8#sh ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O        10.101.17.17/32 [110/3] via 101.1.8.1, 00:51:30, GigabitEthernet3
O IA     10.101.18.18/32 [110/3] via 101.1.8.1, 00:48:38, GigabitEthernet3
O IA     10.101.19.19/32 [110/3] via 101.1.8.1, 00:42:54, GigabitEthernet3
      101.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O        101.1.17.0/24 [110/2] via 101.1.8.1, 00:52:06, GigabitEthernet3
O IA     101.5.18.0/24 [110/2] via 101.1.8.1, 00:48:38, GigabitEthernet3
O IA     101.13.19.0/24 [110/2] via 101.1.8.1, 00:42:54, GigabitEthernet3



IOS17#sh ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O        10.101.8.8/32 [110/3] via 101.1.17.1, 00:49:56, GigabitEthernet0/0
O IA     10.101.18.18/32 [110/3] via 101.1.17.1, 00:47:00, GigabitEthernet0/0
O IA     10.101.19.19/32 [110/3] via 101.1.17.1, 00:41:30, GigabitEthernet0/0
      101.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O        101.1.8.0/24 [110/2] via 101.1.17.1, 00:49:56, GigabitEthernet0/0
O IA     101.5.18.0/24 [110/2] via 101.1.17.1, 00:47:00, GigabitEthernet0/0
O IA     101.13.19.0/24 [110/2] via 101.1.17.1, 00:41:30, GigabitEthernet0/0



IOS18#sh ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
O IA     10.101.8.8/32 [110/3] via 101.5.18.5, 00:47:06, GigabitEthernet0/0
O IA     10.101.17.17/32 [110/3] via 101.5.18.5, 00:47:06, GigabitEthernet0/0
O IA     10.101.19.19/32 [110/3] via 101.5.18.5, 00:41:29, GigabitEthernet0/0
      101.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O IA     101.1.8.0/24 [110/2] via 101.5.18.5, 00:47:06, GigabitEthernet0/0
O IA     101.1.17.0/24 [110/2] via 101.5.18.5, 00:47:06, GigabitEthernet0/0
O IA     101.13.19.0/24 [110/2] via 101.5.18.5, 00:41:29, GigabitEthernet0/0



IOS19#sh ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 9 subnets, 2 masks
O E2     10.101.8.8/32 [110/2] via 101.13.19.13, 00:00:02, GigabitEthernet0/0
O E2     10.101.17.17/32 
           [110/2] via 101.13.19.13, 00:00:02, GigabitEthernet0/0
O E2     10.101.18.18/32 
           [110/2] via 101.13.19.13, 00:00:02, GigabitEthernet0/0
      101.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O E2     101.1.8.0/24 [110/1] via 101.13.19.13, 00:00:02, GigabitEthernet0/0
O E2     101.1.17.0/24 [110/1] via 101.13.19.13, 00:00:02, GigabitEthernet0/0
O E2     101.5.18.0/24 [110/1] via 101.13.19.13, 00:00:02, GigabitEthernet0/0



XR13
router ospf 100
 vrf C1
  domain-id type 0005 value 000000640200


IOS19#sh ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 9 subnets, 2 masks
O IA     10.101.8.8/32 [110/3] via 101.13.19.13, 00:00:04, GigabitEthernet0/0
O IA     10.101.17.17/32 
           [110/3] via 101.13.19.13, 00:00:04, GigabitEthernet0/0
O IA     10.101.18.18/32 
           [110/3] via 101.13.19.13, 00:00:04, GigabitEthernet0/0
      101.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O IA     101.1.8.0/24 [110/2] via 101.13.19.13, 00:00:04, GigabitEthernet0/0
O IA     101.1.17.0/24 [110/2] via 101.13.19.13, 00:00:04, GigabitEthernet0/0
O IA     101.5.18.0/24 [110/2] via 101.13.19.13, 00:00:04, GigabitEthernet0/0



IOS19#traceroute 10.101.8.8 source loopback 101 numeric 
Type escape sequence to abort.
Tracing the route to 10.101.8.8
VRF info: (vrf in name/id, vrf out name/id)
  1 101.13.19.13 21 msec 3 msec 4 msec
  2 10.13.14.14 [MPLS: Labels 24009/75 Exp 0] 26 msec 21 msec 22 msec
  3 10.3.14.3 [MPLS: Labels 33/75 Exp 0] 28 msec 20 msec 22 msec
  4 101.1.8.1 [MPLS: Label 75 Exp 0] 24 msec 19 msec 18 msec
  5 101.1.8.8 32 msec *  29 msec


IOS19#traceroute 10.101.17.17 source loopback 101 numeric 
Type escape sequence to abort.
Tracing the route to 10.101.17.17
VRF info: (vrf in name/id, vrf out name/id)
  1 101.13.19.13 15 msec 3 msec 6 msec
  2 10.13.14.14 [MPLS: Labels 24009/62 Exp 0] 98 msec 28 msec 20 msec
  3 10.3.14.3 [MPLS: Labels 33/62 Exp 0] 26 msec 25 msec 20 msec
  4 101.1.17.1 [MPLS: Label 62 Exp 0] 23 msec 19 msec 21 msec
  5 101.1.17.17 37 msec *  90 msec


IOS19#traceroute 10.101.18.18 source loopback 101 numeric 
Type escape sequence to abort.
Tracing the route to 10.101.18.18
VRF info: (vrf in name/id, vrf out name/id)
  1 101.13.19.13 11 msec 5 msec 2 msec
  2 10.13.14.14 [MPLS: Labels 24010/19 Exp 0] 25 msec 91 msec 25 msec
  3 10.3.14.3 [MPLS: Labels 29/19 Exp 0] 30 msec 158 msec 25 msec
  4 101.5.18.5 [MPLS: Label 19 Exp 0] 19 msec 23 msec 21 msec
  5 101.5.18.18 36 msec *  37 msec
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  • Home
  • Technology VoD!
    • Cisco >
      • Route & Switch / Enterprise Infrastructure
  • Technology Breakdowns!
    • Route&Switch/Ent. Infra. >
      • L2 Technologies
      • L3 Technologies
      • VPN Technologies
      • Services >
        • IOS - Dynamic NAT
        • HSRP - IPv4 Setup
        • HSRP - Priority and Preemption
    • Service Provider >
      • IGPs (Interior Gateway Protocols)
      • First Hop Redundancy >
        • HSRP (Hot Standby Router Protocol) >
          • HSRP - IOS/IOS XE Setup
          • HSRP - IOS XR Setup
      • BGP (Border Gateway Protocol)
      • Inter AS Multicast (MSDP)
      • Intra-AS MPLS
      • Inter-AS MPLS
    • Security >
      • IOS Firewall
      • ASA Firewall
      • FirePOWER Threat Defense >
        • FTD - FTD NGFW Device Setup and FMC Integration
      • VPNs >
        • PKI
        • Site to Site VPNs
        • Remote Access VPNs >
          • IOS Remote Access
          • ASA Remote Access
    • Data Center >
      • Nexus 9000v >
        • Nexus 9000v - Enabling Features
        • Nexus 9000v - VLANs and Trunks
        • Nexus 9000v - LACP Port Channels
        • Nexus 9000v - vPC (Virtual Port Channel)
        • Nexus 9000v - OSPFv2
        • Nexus 9000v - VXLAN - Ingress Replication Flood and Learn
        • Nexus 9000v - IP Multicast
        • Nexus 9000v - VxLAN - Multicast Flood and Learn
        • Nexus 9000v - VxLAN - BGP EVPN with Multicast
        • Nexus 9000v - VxLAN - BGP EVPN w/Ingress Replication
        • Nexus 9000v - VxLAN - Inter-VxLAN Routing with BGP EVPN
        • Nexus 9000v - VXLAN - External Routing
      • Nexus 7000v
    • Palo Alto