! spine
router bgp 65002
  bgp reject-as-sets
  no bgp ebgp-requires-policy
  neighbor 192.168.255.2 remote-as 65001
  neighbor 192.168.255.2 timers 3 10
  neighbor 192.168.254.2 remote-as 65003
  neighbor 192.168.254.2 timers 3 10
  address-family ipv4 unicast
    aggregate-address 172.16.0.0/16 as-set summary-only
  exit-address-family
  !
!
