​​Summary:

1. Turn off ospf on all routers and configure basic IP addresses

 

2. Configure all routers to operate in a multiarea configuration. 

      -Tie, Belt, and Scok will act as ABRs

      -Add 5 loopback interfaces to Ring, Hat, and Shoe to

       simulate real ospf networks. They should be contiguous to

       existing area subnets 

 

 

 

 

1. Turn off ospf on all routers and configure basic IP addresses

 

Turn off ospf on all routers: no router ospf 1

Ring:

Ring#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            unassigned      YES unset  administratively down down
FastEthernet0/1            unassigned      YES unset  administratively down down
Serial1/0                  10.1.1.2        YES manual up                    up
Serial1/1                  unassigned      YES unset  administratively down down
Serial1/2                  unassigned      YES unset  administratively down down
Serial1/3                  unassigned      YES unset  administratively down down
Ring#


Hat:

Hat#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            unassigned      YES unset  administratively down down
FastEthernet0/1            unassigned      YES unset  administratively down down
Serial1/0                  10.2.1.2        YES manual up                    up
Serial1/1                  unassigned      YES unset  administratively down down
Serial1/2                  unassigned      YES unset  administratively down down
Serial1/3                  unassigned      YES unset  administratively down down


Belt:

Belt#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            10.0.0.2        YES manual up                    up
FastEthernet0/1            unassigned      YES unset  administratively down down
Serial1/0                  10.1.1.1        YES manual up                    up
Serial1/1                  unassigned      YES unset  administratively down down
Serial1/2                  unassigned      YES unset  administratively down down
Serial1/3                  unassigned      YES unset  administratively down down
Loopback0                  2.2.2.2         YES manual up                    up
Belt#


Tie:

Tie#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            10.0.0.1        YES manual up                    up
FastEthernet0/1            unassigned      YES unset  administratively down down
Serial1/0                  10.2.1.1        YES manual up                    up
Serial1/1                  unassigned      YES unset  administratively down down
Serial1/2                  unassigned      YES unset  administratively down down
Serial1/3                  unassigned      YES unset  administratively down down
Loopback0                  1.1.1.1         YES manual up                    up
Tie#


Sock:

Sock#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            10.0.0.3        YES manual up                    up
FastEthernet0/1            unassigned      YES unset  administratively down down
Serial1/0                  10.51.1.1       YES manual up                    up
Serial1/1                  unassigned      YES unset  administratively down down
Serial1/2                  unassigned      YES unset  administratively down down
Serial1/3                  unassigned      YES unset  administratively down down
Loopback0                  3.3.3.3         YES manual up                    up
Sock#


Shoe:

Shoe#sh ip int br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            10.1.3.1        YES manual up                    up
FastEthernet0/1            unassigned      YES unset  administratively down down
Serial1/0                  10.51.1.2       YES manual up                    up
Serial1/1                  unassigned      YES unset  administratively down down
Serial1/2                  unassigned      YES unset  administratively down down
Serial1/3                  unassigned      YES unset  administratively down down
Loopback0                  4.4.4.4         YES manual up                    up
Shoe#

 

 

 

2. Configure all routers to operate in a multiarea configuration. 

      -Tie, Belt, and Scok will act as ABRs

      -Add 5 loopback interfaces to Ring, Hat, and Shoe to

       simulate real ospf networks. They should be contiguous to

       existing area subnets 

Belt: (ABR)


router ospf 1
 network 10.0.0.2 0.0.0.0 area 0
 network 10.1.1.1 0.0.0.0 area 1



Ring:

router ospf 1
 network 10.1.1.2 0.0.0.0 area 1


#Add 5 loopback interfaces to Ring

interface loopback0
 ip address 10.1.0.1 255.255.255.0
 ip ospf network point-to-point   !----------- you fake GNS3 to see this as a real point to point, not loopback interface connection

interface loopback1
 ip address 10.1.2.1 255.255.255.0
 ip ospf network point-to-point

interface loopback2
 ip address 10.1.3.1 255.255.255.0
 ip ospf network point-to-point

interface loopback3
 ip address 10.1.4.1 255.255.255.0
 ip ospf network point-to-point

interface loopback4
 ip address 10.1.5.1 255.255.255.0
 ip ospf network point-to-point

#Advertise all loopback interfaces
router ospf 1
 network 10.1.0.0 0.0.255.255 area 1


#Test:

Belt#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     2.0.0.0/32 is subnetted, 1 subnets
C       2.2.2.2 is directly connected, Loopback0
     10.0.0.0/24 is subnetted, 7 subnets
O       10.1.3.0 [110/65] via 10.1.1.2, 00:00:56, Serial1/0
O       10.1.2.0 [110/65] via 10.1.1.2, 00:00:56, Serial1/0
C       10.1.1.0 is directly connected, Serial1/0
C       10.0.0.0 is directly connected, FastEthernet0/0
O       10.1.0.0 [110/65] via 10.1.1.2, 00:00:56, Serial1/0
O       10.1.5.0 [110/65] via 10.1.1.2, 00:00:56, Serial1/0
O       10.1.4.0 [110/65] via 10.1.1.2, 00:00:57, Serial1/0





Tie: (ABR)

router ospf 1
 network 10.0.0.1 0.0.0.0 area 0
 network 10.2.1.1 0.0.0.0 area 2

Hat:

router ospf 1
 network 10.2.1.2 0.0.0.0 area 2


#Add 5 loopback interfaces to Hat

interface loopback0
 ip address 10.2.0.1 255.255.255.0
 ip ospf network point-to-point

interface loopback1
 ip address 10.2.2.1 255.255.255.0
 ip ospf network point-to-point

interface loopback2
 ip address 10.2.3.1 255.255.255.0
 ip ospf network point-to-point

interface loopback3
 ip address 10.2.4.1 255.255.255.0
 ip ospf network point-to-point

interface loopback4
 ip address 10.2.5.1 255.255.255.0
 ip ospf network point-to-point

#Advertise all loopback interfaces

router ospf 1
 network 10.2.0.0 0.0.255.255 area 2


Sock: (ABR)

router ospf 1
 network 10.0.0.3 0.0.0.0 area 0
 network 10.51.1.1 0.0.0.0 area 51


Shoe:

router ospf 1
 network 10.51.1.2 0.0.0.0 area 51

#Add 5 loopback interfaces to Shoe

interface loopback0
 ip address 10.51.0.1 255.255.255.0
 ip ospf network point-to-point

interface loopback1
 ip address 10.51.2.1 255.255.255.0
 ip ospf network point-to-point

interface loopback2
 ip address 10.51.3.1 255.255.255.0
 ip ospf network point-to-point

interface loopback3
 ip address 10.51.4.1 255.255.255.0
 ip ospf network point-to-point

interface loopback4
 ip address 10.51.5.1 255.255.255.0
 ip ospf network point-to-point

#Advertise all loopback interfaces

router ospf 1
 network 10.51.0.0 0.0.255.255 area 51

 

 

 

 

 

 

 

 

 

 

 

 

 

-Yu