! enable OSPF; connect to the

  ! backbone area

  ! use simple authentication

   password Mutt-N-Jeff

   enable password SURtest

  !

   interface eth1

   ip ospf authentication-key UTrustME

   ip ospf priority 5

  !

   router ospf

   ospf router-id 172.16.1.9

   network 172.16.1.0/24 area 0

  !

ip ospf priority 

   this clause defines the priority number this system uses when the area elects a designated router

ip ospf authentication-key 

   clause defines the clear text string used to identify valid OSPF advertisements, is used to prevent accidental updates from misconfigured systems.   

   supports MD5 for stronger authentication

router ospf 

   this statement enables the OSPF protocol

network 

   this clause identifies the network over which OSPF routes will be exchanged.   This is always defined by an IP-address/network-mask pair.