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​​Summary:

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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 

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

 

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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#

 

 

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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

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-Yu

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