frr defaults traditional
hostname r4
interface eth1
 ip address 10.207.6.1/30
interface eth2
 ip address 10.207.7.1/30
interface dum0
 ip address 100.64.4.1/24
router bgp 64604
 bgp router-id 10.207.0.7
 no bgp ebgp-requires-policy
 timers bgp 3 9
 neighbor 10.207.6.2 remote-as 64610
 neighbor 10.207.6.2 description a (proveedor)
 neighbor 10.207.6.2 advertisement-interval 0
 neighbor 10.207.7.2 remote-as 64620
 neighbor 10.207.7.2 description b (proveedor)
 neighbor 10.207.7.2 advertisement-interval 0
 address-family ipv4 unicast
  network 100.64.4.0/24
  neighbor 10.207.6.2 route-map SOLO-PROPIAS out
  neighbor 10.207.7.2 route-map SOLO-PROPIAS out
 exit-address-family
! Regla de exportación de un cliente con dos proveedores: solo sale lo que origina
! el propio AS, es decir, las rutas con AS_PATH vacío.
bgp as-path access-list PROPIAS seq 5 permit ^$
route-map SOLO-PROPIAS permit 10
 match as-path PROPIAS