—–OSPF
router ospf [process ID] ! CAN Be DIFFERENT to a neighbour]
network [ip] [wildcard] area [X] !’TURN ON FOR THIS INT, “ADVERTISE THIS LINK” 0 is backbone
[router with with default route to share]
conf t
router osfp [Process ID]
default-information originate
summary routes
router ospf [process]
network [ip] wilcard area 1 ‘setting up the router as an ABR, where the next area begins
area [Area where ip’s reside that we are sumarizing] range [ip] [subnet] ‘ set the summary route
set router id, or you can create a loopback
router ospf [process id]
router-id [IP]
—Restart the ospf process
clear ip ospf process