Network Name	Network Address	Subnet Mask	Default Gateway	Router acting as Gateway
Border-to-Data Center	10.3.1.0	255.255.255.248	10.3.1.1	Border
East-Router2 to Data Center	10.3.1.20	255.255.255.252	10.3.1.21	East-Router
DataCenter-to WestRouter4	10.3.1.32	255.255.255.252	10.3.1.33	Data Center-Router
East	10.3.20.0	255.255.255.0	10.3.20.1	East-Router
West	10.3.40.0	255.255.255.0	10.3.40.1	West-Router

Boarder-Router1

   enable
   config t
   hostname Jude-Border-Router1
   interface GigabitEthernet 0/0
   no shutdown
   ip address 10.3.1.1 255.255.255.243
   exit
   router ospf 1
   network 10.3.1.0 0.0.0.7 area 0

East-Router2

  enable
  config t
  hostname Jude-East-Router2
  interface GigabitEthernet 0/0
  no shutdown
  ip address 10.3.1.21 255.255.255.252
  exit
  interface GigabitEthernet 0/1
  no shutdown
  ip address 10.3.20.1 255.255.255.0
  router ospf 1
  network 10.3.1.20 0.0.0.3 area 0
  network 10.3.20.0 0.0.0.255 area 0

DataCenter-Router3

  enable
  config t
  hostname Jude-DataCenter-Router3
  interface GigabitEthernet 0/0
  no shutdown
  ip address 10.3.1.22 255.255.255.252
  exit
  interface GigabitEthernet 0/1
  no shutdown
  ip address 10.3.1.33 255.255.255.252
  exit
  interface GigabitEthernet 0/2
  no shutdown
  ip address 10.3.1.2 255.255.255.243
  exit
  router ospf 1
  network 10.3.1.0 0.0.0.7 area 0
  network 10.3.1.32 0.0.0.3 area 0
  network 10.3.1.20 0.0.0.3 area 0

West-Router4

  enable
  config t
  hostname Jude-West-Router4
  interface GigabitEthernet 0/0
  no shutdown
  ip address 10.3.1.34 255.255.255.252
  exit
  interface GigabitEthernet 0/1
  no shutdown
  ip address 10.3.40.1 255.255.255.0
  exit
  router ospf 1
  network 10.3.1.32 0.0.0.3 area 0
  network 10.3.40.0 0.0.0.255 area 0

Authentication

Boarder-Router1

  enable 
  config t 
  interface GigabitEthernet 0/0 
  ip ospf message-digest-key 1 md5 testing 
  ip ospf authentication message-digest

East-Router2

  enable 
  config t 
  interface GigabitEthernet 0/0 
  ip ospf message-digest-key 1 md5 testing 
  ip ospf authentication message-digest

DataCenter-Router3

  enable 
  config t 
  interface GigabitEthernet 0/0 
  ip ospf message-digest-key 1 md5 testing 
  ip ospf authentication message-digest 
  exit
  interface GigabitEthernet 0/1 
  ip ospf message-digest-key 1 md5 testing 
  ip ospf authentication message-digest 
  exit
  interface GigabitEthernet 0/2 
  ip ospf message-digest-key 1 md5 testing 
  ip ospf authentication message-digest

West-Router4

  enable 
  config t 
  interface GigabitEthernet 0/0 
  ip ospf message-digest-key 1 md5 testing 
  ip ospf authentication message-digest