R1 & R2
---------
router bgp 64864
address-family ipv4
no maximum-paths ibgp 4

R3 & R4
---------
router bgp 64828
no maximum-paths ibgp 4


R5 & R7
--------
router bgp 648xx
bgp dmzlink-bw
maximum-paths ibgp 2
E0-E1
ip load sharing per-packet