!
int r1-eth0
 ip address 192.168.1.1/24
!
router bgp 65001
 bgp router-id 192.168.1.1
 no bgp ebgp-requires-policy
 no bgp network import-check
 neighbor 192.168.1.2 remote-as external
 neighbor 192.168.1.3 remote-as external
 neighbor 192.168.1.4 remote-as external
 address-family ipv4 unicast
  network 10.10.10.10/32
  neighbor 192.168.1.2 route-map rmap out
  neighbor 192.168.1.3 route-map rmap out
  neighbor 192.168.1.4 route-map rmap out
 exit-address-family
!
route-map rmap permit 10
 set extcommunity nt 192.168.1.3:0 192.168.1.4:0
exit