! Core2 Configuration
! Core Router - AS 65500
! Transit between DC Border Leafs and Campus Border Leafs
!
hostname core2
!
! LLDP Management0
lldp management-address Management0
!
! enable gNMI API
management api gnmi
   transport grpc default
   provider eos-native
!
! admin/admin for ssh access
username admin privilege 15 role network-admin secret sha512 $6$xQktFrbdeqEhVzLM$.1wOJB25nw2fqYaSXDu6y4mo6AP9hngMCFe2vGDl84hWoz00Q.4unoEBqspNI0HEoRz.OZhdBHqQv12KABf0B0
!
! Enable IP routing
ip routing
!
! Enable routing protocols
service routing protocols model multi-agent
!
! VRF Definition
vrf instance gold
!
! Management interface
interface Management0
   ip address 172.16.0.11/24
!
! Loopback for BGP Router-ID (default VRF)
interface Loopback0
   description Router-ID
   ip address 10.0.200.2/32
!
! Loopback in VRF Gold (router-id and health)
interface Loopback1
   description VRF-Gold-RouterID
   vrf gold
   ip address 10.0.200.102/32
!
! Link to DC Border Leaf 1
interface Ethernet1
   description border-leaf-dc1
   no switchport
   mtu 9214
!
interface Ethernet1.100
   description border-leaf-dc1-underlay
   encapsulation dot1q vlan 100
   ip address 10.0.4.4/31
   mtu 9214
!
interface Ethernet1.200
   description border-leaf-dc1-vrf-gold
   encapsulation dot1q vlan 200
   vrf gold
   ip address 10.0.14.4/31
   mtu 9214
!
! Link to DC Border Leaf 2
interface Ethernet2
   description border-leaf-dc2
   no switchport
   mtu 9214
!
interface Ethernet2.100
   description border-leaf-dc2-underlay
   encapsulation dot1q vlan 100
   ip address 10.0.4.6/31
   mtu 9214
!
interface Ethernet2.200
   description border-leaf-dc2-vrf-gold
   encapsulation dot1q vlan 200
   vrf gold
   ip address 10.0.14.6/31
   mtu 9214
!
! Link to Campus Border Leaf 1
interface Ethernet3
   description border-leaf-campus1
   no switchport
   mtu 9214
!
interface Ethernet3.100
   description border-leaf-campus1-underlay
   encapsulation dot1q vlan 100
   ip address 10.0.5.4/31
   mtu 9214
!
interface Ethernet3.200
   description border-leaf-campus1-vrf-gold
   encapsulation dot1q vlan 200
   vrf gold
   ip address 10.0.15.4/31
   mtu 9214
!
! Link to Campus Border Leaf 2
interface Ethernet4
   description border-leaf-campus2
   no switchport
   mtu 9214
!
interface Ethernet4.100
   description border-leaf-campus2-underlay
   encapsulation dot1q vlan 100
   ip address 10.0.5.6/31
   mtu 9214
!
interface Ethernet4.200
   description border-leaf-campus2-vrf-gold
   encapsulation dot1q vlan 200
   vrf gold
   ip address 10.0.15.6/31
   mtu 9214
!
! Inter-Core link
interface Ethernet5
   description core1
   no switchport
   mtu 9214
!
interface Ethernet5.100
   description core1-underlay
   encapsulation dot1q vlan 100
   ip address 10.0.200.129/31
   mtu 9214
!
interface Ethernet5.200
   description core1-vrf-gold
   encapsulation dot1q vlan 200
   vrf gold
   ip address 10.0.200.131/31
   mtu 9214
!
! IP Routing
ip routing
ip routing vrf gold
ip route 100.64.0.0/10 172.16.0.254
!
! OSPF for loopback reachability (default VRF)
router ospf 1
   router-id 10.0.200.2
   passive-interface default
   no passive-interface Ethernet1.100
   no passive-interface Ethernet2.100
   no passive-interface Ethernet3.100
   no passive-interface Ethernet4.100
   no passive-interface Ethernet5.100
   network 10.0.200.2/32 area 0
   network 10.0.4.4/31 area 0
   network 10.0.4.6/31 area 0
   network 10.0.5.4/31 area 0
   network 10.0.5.6/31 area 0
   network 10.0.200.128/31 area 0
   max-lsa 12000
!
! BGP Configuration
router bgp 65500
   router-id 10.0.200.2
   no bgp default ipv4-unicast
   bgp log-neighbor-changes
   distance bgp 20 200 200
   maximum-paths 4 ecmp 64
   !
   ! iBGP to core1 (loopback-based, default VRF)
   neighbor core_ibgp peer group
   neighbor core_ibgp remote-as 65500
   neighbor core_ibgp update-source Loopback0
   neighbor core_ibgp next-hop-self
   neighbor core_ibgp send-community extended
   neighbor core_ibgp maximum-routes 12000 warning-only
   neighbor 10.0.200.1 peer group core_ibgp
   !
   ! eBGP to DC Border Leafs (default VRF)
   neighbor dc_bl peer group
   neighbor dc_bl remote-as 65005
   neighbor dc_bl send-community extended
   neighbor dc_bl maximum-routes 12000 warning-only
   neighbor 10.0.4.5 peer group dc_bl
   neighbor 10.0.4.7 peer group dc_bl
   !
   ! eBGP to Campus Border Leafs (default VRF)
   neighbor campus_bl peer group
   neighbor campus_bl remote-as 66005
   neighbor campus_bl send-community extended
   neighbor campus_bl maximum-routes 12000 warning-only
   neighbor 10.0.5.5 peer group campus_bl
   neighbor 10.0.5.7 peer group campus_bl
   !
   ! IPv4 address family (default VRF)
   address-family ipv4
      neighbor core_ibgp activate
      neighbor dc_bl activate
      neighbor campus_bl activate
      network 10.0.200.2/32
   !
   ! VRF Gold configuration - transit for inter-fabric routing
   vrf gold
      rd 10.0.200.2:100001
      router-id 10.0.200.2
      ! iBGP to core1 in VRF gold (P2P)
      neighbor 10.0.200.130 remote-as 65500
      neighbor 10.0.200.130 next-hop-self
      neighbor 10.0.200.130 send-community extended
      neighbor 10.0.200.130 maximum-routes 12000 warning-only
      ! eBGP to DC Border Leafs in VRF gold
      neighbor 10.0.14.5 remote-as 65005
      neighbor 10.0.14.5 send-community extended
      neighbor 10.0.14.5 maximum-routes 12000 warning-only
      neighbor 10.0.14.7 remote-as 65005
      neighbor 10.0.14.7 send-community extended
      neighbor 10.0.14.7 maximum-routes 12000 warning-only
      ! eBGP to Campus Border Leafs in VRF gold
      neighbor 10.0.15.5 remote-as 66005
      neighbor 10.0.15.5 send-community extended
      neighbor 10.0.15.5 maximum-routes 12000 warning-only
      neighbor 10.0.15.7 remote-as 66005
      neighbor 10.0.15.7 send-community extended
      neighbor 10.0.15.7 maximum-routes 12000 warning-only
      redistribute connected
!
end