frr-bgp-l3vpn-gre.yml

#         +---------+                                                 +---------+
#         |         |                                                 |         |
#         |   CE1   |                                                 |   CE2   |
#         |         |                                                 |         |
#         +---------+                                                 +---------+
#      ce1-eth0|                                                           |ce2-eth0
#              |                                                           |
# 172.16.1.0/24|                                                           |172.16.2.0/24
#              |                                                           |
#      rt1-eth0|         10.0.1.0/24                   10.0.3.0/24         |rt3-eth0
#         +---------+                   +---------+                   +---------+
#         |         |                   |         |                   |         |
#         |   RT1   |rt1-eth1   rt2-eth0|   RT2   |rt2-eth2   rt3-eth1|   RT3   |
#         | 1.1.1.1 +-------------------+ 2.2.2.2 +-------------------+ 3.3.3.3 |
#         |         |                   |         |                   |         |
#         +---------+                   +---------+                   +---------+
#                        10.0.2.0/24                   10.0.4.0/24

---

routers:

  ce1:
    links:
      ce1-eth0:
        peer: [rt1, rt1-eth0]
        ipv4: 172.16.1.1/24
    frr:
      zebra:
        config: |
      staticd:
        delay: 1
        config: |
          ip route 0.0.0.0/0 172.16.1.10

  ce2:
    links:
      ce2-eth0:
        peer: [rt3, rt3-eth0]
        ipv4: 172.16.2.1/24
    frr:
      zebra:
        config: |
      staticd:
        delay: 1
        config: |
          ip route 0.0.0.0/0 172.16.2.10

  rt1:
    links:
      rt1-RED:
        type: vrf
        table: 10
      rt1-lo1:
        ipv4: 1.1.1.1/32
      rt1-eth0:
        vrf: rt1-RED
        peer: [ce1, ce1-eth0]
        ipv4: 172.16.1.10/24
      rt1-eth1:
        peer: [rt2, rt2-eth0]
        mpls: yes
        ipv4: 10.0.1.1/24
    shell: |
      ip tunnel add gre1 mode gre remote 10.0.3.3 local 10.0.1.1 ttl 64
      ip link set gre1 up
      ip addr add 40.0.0.1/24 dev gre1
      sysctl -w net.mpls.conf.gre1.input=1
    frr:
      zebra:
        config: |
          interface rt1-eth0
           no link-detect
          !
          interface rt1-eth1
           no link-detect
          !
      staticd:
        delay: 1
        config: |
          ip route 3.3.3.3/32 40.0.0.2 gre1
      ospfd:
        config: |
          interface rt1-lo1
           ip ospf area 0
          !
          interface rt1-eth1
           ip ospf area 0
           ip ospf hello-interval 1
           ip ospf dead-interval 3
          !
          router ospf
           ip ospf area 0
           router-id 1.1.1.1
          !
      ldpd:
        config: |
          mpls ldp
           router-id 1.1.1.1
           !
           address-family ipv4
            discovery transport-address 1.1.1.1
            label local allocate host-routes
            !
            interface gre1
            !
           !
          !
      bgpd:
        config: |
          router bgp 1
           neighbor 3.3.3.3 remote-as 1
           neighbor 3.3.3.3 update-source rt1-lo1
           !
           address-family ipv4 vpn
            neighbor 3.3.3.3 activate
           exit-address-family
           !
          !
          router bgp 1 vrf rt1-RED
           address-family ipv4 unicast
            rd vpn export 1:1
            rt vpn both 1:1
            label vpn export auto
            redistribute connected
            import vpn
            export vpn
           exit-address-family
          !

  rt2:
    links:
      rt2-lo1:
        ipv4: 2.2.2.2/32
      rt2-eth0:
        peer: [rt1, rt1-eth1]
        mpls: yes
        ipv4: 10.0.1.2/24
      rt2-eth2:
        peer: [rt3, rt3-eth1]
        mpls: yes
        ipv4: 10.0.3.2/24
    frr:
      zebra:
        config: |
          interface rt2-eth0
           no link-detect
          !
          interface rt2-eth2
           no link-detect
          !
      ospfd:
        config: |
          interface rt2-lo1
           ip ospf area 0
          !
          interface rt2-eth0
           ip ospf area 0
           ip ospf hello-interval 1
           ip ospf dead-interval 3
          !
          interface rt2-eth2
           ip ospf area 0
           ip ospf hello-interval 1
           ip ospf dead-interval 3
          !
          router ospf
           router-id 2.2.2.2
          !

  rt3:
    links:
      rt3-RED:
        type: vrf
        table: 10
      rt3-lo1:
        ipv4: 3.3.3.3/32
      rt3-eth0:
        vrf: rt3-RED
        peer: [ce2, ce2-eth0]
        ipv4: 172.16.2.10/24
      rt3-eth1:
        peer: [rt2, rt2-eth2]
        mpls: yes
        ipv4: 10.0.3.3/24
    shell: |
      ip tunnel add gre1 mode gre remote 10.0.1.1 local 10.0.3.3 ttl 64
      ip link set gre1 up
      ip addr add 40.0.0.2/24 dev gre1
      sysctl -w net.mpls.conf.gre1.input=1
    frr:
      zebra:
        config: |
          interface rt3-eth0
           no link-detect
          !
          interface rt3-eth1
           no link-detect
          !
      staticd:
        delay: 1
        config: |
          ip route 1.1.1.1/32 40.0.0.1 gre1
      ospfd:
        config: |
          interface rt3-lo1
           ip ospf area 0
          !
          interface rt3-eth1
           ip ospf area 0
           ip ospf hello-interval 1
           ip ospf dead-interval 3
          !
          router ospf
           router-id 3.3.3.3
          !
      ldpd:
        config: |
          mpls ldp
           router-id 3.3.3.3
           !
           address-family ipv4
            discovery transport-address 3.3.3.3
            label local allocate host-routes
            !
            interface gre1
            !
           !
          !
      bgpd:
        config: |
          router bgp 1
           neighbor 1.1.1.1 remote-as 1
           neighbor 1.1.1.1 update-source rt3-lo1
           !
           address-family ipv4 vpn
            neighbor 1.1.1.1 activate
           exit-address-family
           !
          !
          router bgp 1 vrf rt3-RED
           address-family ipv4 unicast
            rd vpn export 1:1
            rt vpn both 1:1
            label vpn export auto
            redistribute connected
            import vpn
            export vpn
           exit-address-family
          !

switches:

frr:
  base-configs:
    all: |
      hostname %(node)-%(daemon)
      password 1
      log file %(logdir)/%(node)-%(daemon).log
      log commands
    zebra: |
      !debug zebra kernel
      debug zebra rib detailed
      debug zebra rib
      debug zebra nht
      debug zebra pseudowires
      debug zebra packet
    ospfd: |
      debug ospf zebra
    ldpd: |
      debug mpls ldp zebra
      debug mpls ldp event
      debug mpls ldp errors
      debug mpls ldp messages recv
      debug mpls ldp messages sent
      debug mpls ldp discovery hello recv
    bgpd: |
      debug bgp zebra
      debug bgp nht
      debug bgp update in
      debug bgp neighbor-events

Hi @rwestphal

I am new to this FRR routing, I have installed the FRR routing and all daemons running, I would like to recreate your scenario in my local environment,
could you please provide me step by step guide how to use this "frr-bgp-l3vpn-gre.yml" file with FRR routing ? do you have any documentation or procedure. really appreciate your help

Thank you