frr defaults traditional
hostname b4
! AS 65100, router b4.
interface lo
 ip address 100.64.100.4/32
 ip ospf area 0
interface eth1
 description hacia b3
 ip address 10.207.34.2/30
 ip ospf area 0
 ip ospf network point-to-point
interface eth2
 description hacia x
 ip address 10.207.4.1/30
! Los routers de borde anuncian el bloque del AS.
ip route 100.64.100.0/24 Null0
router ospf
 ospf router-id 100.64.100.4
router bgp 65100
 bgp router-id 100.64.100.4
 no bgp ebgp-requires-policy
 ! Malla completa de iBGP: una sesión con cada otro router, entre loopbacks.
 ! Las sesiones esperan a OSPF: se reintenta cada 5 s, en vez de los 120 s por defecto.
 neighbor 100.64.100.1 remote-as 65100
 neighbor 100.64.100.1 update-source lo
 neighbor 100.64.100.1 timers connect 5
 neighbor 100.64.100.2 remote-as 65100
 neighbor 100.64.100.2 update-source lo
 neighbor 100.64.100.2 timers connect 5
 neighbor 100.64.100.3 remote-as 65100
 neighbor 100.64.100.3 update-source lo
 neighbor 100.64.100.3 timers connect 5
 neighbor 10.207.4.2 remote-as 65200
 address-family ipv4 unicast
  network 100.64.100.0/24
 exit-address-family