frrouting vpn/bgp+mpls inter-as option b

README.md

frrouting vpn/bgp+mpls inter-as option b

• with next-hop-self
• with loopback
• without bgp labeled-unicast
• without route-reflector
• without multi-hop ebgp

r1, r2

exit
ip link add A type vrf table 10
ip link set A up
vtysh
conf t

r3, r4

exit
ip link add A type vrf table 10
ip link set A up
ip link set eth1 master A
vtysh
conf t

r1.vtysh

int lo
  ip addr 100.0.0.1/32

int eth0
  ip addr 192.168.0.1/24

int eth1
  ip addr 192.168.1.1/24

ip route 100.0.0.2/32 192.168.0.2
ip route 100.0.0.3/32 192.168.1.2

router bgp 65000
  no bgp default ipv4-unicast
  neighbor 192.168.0.2 remote-as 65001
  neighbor 100.0.0.3 remote-as 65000
  neighbor 100.0.0.3 update-source lo
  address-family ipv4
    redistribute connected
    neighbor 192.168.0.2 activate
    neighbor 100.0.0.3 activate
  address-family ipv4 vpn
    neighbor 192.168.0.2 activate
    neighbor 192.168.0.2 next-hop-self
    neighbor 100.0.0.3 activate
    neighbor 100.0.0.3 next-hop-self

router bgp 65000 vrf A
  address-family ipv4
    import vpn
    export vpn
    rd vpn export 100.0.0.1:1
    rt vpn both 65000:1
    label vpn export auto
    redistribute connected

end

r2.vtysh

int lo
  ip addr 100.0.0.2/32

int eth0
  ip addr 192.168.0.2/24

int eth1
  ip addr 192.168.2.1/24

ip route 100.0.0.1/32 192.168.0.1
ip route 100.0.0.4/32 192.168.2.2

router bgp 65001
  no bgp default ipv4-unicast
  neighbor 192.168.0.1 remote-as 65000
  neighbor 100.0.0.4 remote-as 65001
  neighbor 100.0.0.4 update-source lo
  address-family ipv4
    redistribute connected
    neighbor 192.168.0.1 activate
    neighbor 100.0.0.4 activate
  address-family ipv4 vpn
    neighbor 192.168.0.1 activate
    neighbor 192.168.0.1 next-hop-self
    neighbor 100.0.0.4 activate
    neighbor 100.0.0.4 next-hop-self

router bgp 65001 vrf A
  address-family ipv4
    import vpn
    export vpn
    rd vpn export 100.0.0.2:1
    rt vpn both 65000:1
    label vpn export auto
    redistribute connected

end

r3.vtysh

int lo
  ip addr 100.0.0.3/32

int eth0
  ip addr 192.168.1.2/24

int eth1 vrf A
  ip addr 192.168.3.1/24

ip route 100.0.0.1/32 192.168.1.1

router bgp 65000
  no bgp default ipv4-unicast
  neighbor 100.0.0.1 remote-as 65000
  neighbor 100.0.0.1 update-source lo
  address-family ipv4
    redistribute connected
    neighbor 100.0.0.1 activate
  address-family ipv4 vpn
    neighbor 100.0.0.1 activate
    neighbor 100.0.0.1 next-hop-self

router bgp 65000 vrf A
  address-family ipv4
    import vpn
    export vpn
    rd vpn export 100.0.0.3:1
    rt vpn both 65000:1
    label vpn export auto
    redistribute connected

end

r4.vtysh

int lo
  ip addr 100.0.0.4/32

int eth0
  ip addr 192.168.2.2/24

int eth1 vrf A
  ip addr 192.168.4.1/24

ip route 100.0.0.2/32 192.168.2.1

router bgp 65001
  no bgp default ipv4-unicast
  neighbor 100.0.0.2 remote-as 65001
  neighbor 100.0.0.2 update-source lo
  address-family ipv4
    redistribute connected
    neighbor 100.0.0.2 activate
  address-family ipv4 vpn
    neighbor 100.0.0.2 activate
    neighbor 100.0.0.2 next-hop-self

router bgp 65001 vrf A
  address-family ipv4
    import vpn
    export vpn
    rd vpn export 100.0.0.4:1
    rt vpn both 65000:1
    label vpn export auto
    redistribute connected

end