# read zebra.conf sample first
interface eth0
interface ppp0
 ip ospf network point-to-point
interface ppp1
 ip ospf network point-to-point
router ospf
# turn off useless traffic
 passive interface ppp0
 passive interface eth0
# benefit from specifying bandwidth in zebra.conf
 auto-cost reference-bandwidth 1000
# specify remote node's IP address on point-to-point interfaces
 network 10.0.0.2/32 area 0
[...]