Load-sharing - single path
Router A:
interface loopback 0
ip address 20.200.0.1 255.255.255.255
!
router bgp 100
neighbor 10.200.0.2 remote-as 200
neighbor 10.200.0.2 update-source loopback0
neighbor 10.200.0.2 ebgp-multi-hop 2
!
ip route 10.200.0.2 255.255.255.255 <DMZ-link1, link2>