RTA#show running-config
hostname RTA

ip subnet-zero

interface Loopback0
 ip address 203.250.13.41 255.255.255.0

interface Ethernet0
 ip address 203.250.14.1 255.255.255.0

interface Serial0
 ip address 128.213.63.1 255.255.255.252

router ospf 10
 passive-interface Serial0
 network 203.250.0.0 0.0.255.255 area 0
 network 128.213.0.0 0.0.255.255 area 0

router bgp 100
 network 203.250.0.0 mask 255.255.0.0
 neighbor 128.213.63.2 remote-as 200
 neighbor 203.250.15.2 remote-as 100
 neighbor 203.250.15.2 update-source Loopback0

RTA#
