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Friday, 29 April 2011

CCNA LAB Practice - Routing Protocols (OSPF Configuration)


Routing Protocols

(OSPF Configuration

In A Single Area)

Objective


Understanding the Routing Updates using the Open Shortest Path First (OSPF) in a single area.

The demonstrations include:

  1. OSPF configuration in a point-to-point topology.
  2. OSPF configuration in a broadcast-multiaccess environment.

i. Point-to-Point Topology

The specifications of point-to-point topology are

  1. Router dynamically detects its neighboring router using the hello packets.
  2. No Election: Adjacency is automatic as soon as the two routers can communicate.
  3. OSPF packets are always sent as a multicast to 224.0.0.5

Diagram




Procedure

  1. Configuring & Assigning the IP addresses on the routers R1 & R2.
  2. Check the routing table on both the routers.
  3. Enable the OSPF protocol on both routers so that hosts on the both routers can communicate with each other.
  4. Verifying the Routing protocols on the Router.
  5. Check the routing table on both the routers after enabling the OSPF on both sides.
  6. Verifying the OSPF neighbors on the routers.
  7. Verifying the OSPF interfaces on the routers.
  8. Verifying the OSPF database on the routers.
  9. Verifying the connection of both hosts.
  
Configuration         

Step 1(A): Assigning the IP addresses on the Router R1.

R1(config)#interface serial 0
R1(config-if)#ip address 15.0.0.1 255.0.0.0
R1(config-if)#no shutdown
R1(config-if)#clock rate 64000   (Clock Rate will set only DCE Interface)
R1(config-if)#exit
R1(config)#interface ethernet 0
R1(config-if)#ip address 10.0.0.20 255.0.0.0
R1(config-if)#no shutdown
R1(config-if)#end

Step 1(B): Assigning the IP addresses on the Router R2.

R2(config)#interface serial 0
R2(config-if)#ip address 15.0.0.2 255.0.0.0
R2(config-if)#no shutdown
R2(config-if)#end
R2(config)#interface ethernet 0
R2(config-if)#ip address 20.0.0.2 255.0.0.0
R2(config-if)#no shutdown
R2(config-if)#exit

Step 2(A): Check the Routing table of the Router R1.

RA#sh ip route

C    10.0.0.0/8 is directly connected, Ethernet0
C    15.0.0.0/8 is directly connected, Serial0

Step 2(B): Check the Routing table of the Router R2.

RB#sh ip route

C    20.0.0.0/8 is directly connected, Ethernet0
C    15.0.0.0/8 is directly connected, Serial0
  
Step 3(A): Enable the OSPF protocol on the Router R1.

RA(config)#router ospf 64
RA(config-router)#network 10.0.0.0 0.255.255.255 area 0 (Network to be advertised)
RA(config-router)#network 15.0.0.0 0.255.255.255 area 0 (Network to be advertised)

Step 3(B): Enable the OSPF protocol on the Router R2.

RB(config)#router ospf 64
RB(config-router)#network 15.0.0.0 0.255.255.255 area 0 (Network to be advertised)
RB(config-router)#network 20.0.0.0 0.255.255.255 area 0 (Network to be advertised)

Step 4(A): Check the Routing Protocol on the Router R1.

RA#show ip protocols

Routing Protocol is "ospf 64"

  Redistributing: ospf 64

  Routing for Networks:
    10.0.0.0
    15.0.0.0

  Routing Information Sources:
    Gateway         Distance      Last Update
    20.0.0.20            110      00:10:52
  Distance: (default is 110)

Step 4(B): Check the Routing Protocol on the Router R2.

RB#show ip protocols

Routing Protocol is "ospf 64"

  Redistributing: ospf 64

  Routing for Networks:
    15.0.0.0
    20.0.0.0

  Routing Information Sources:
    Gateway         Distance      Last Update
    15.0.0.1             110      00:12:17

  Distance: (default is 110)

Step 5(A): Check the Routing table of the Router R2 after enabling OSPF.

RA#sh ip route

O    20.0.0.0/8 [110/74] via 15.0.0.2, 00:22:17, Serial0
C    10.0.0.0/8 is directly connected, Ethernet0
C    15.0.0.0/8 is directly connected, Serial0

Step 5(B): Check the Routing table of the Router R2 after enabling OSPF.

RB#sh ip route

C    20.0.0.0/8 is directly connected, Ethernet0
O    10.0.0.0/8 [110/74] via 15.0.0.1, 00:20:57, Serial0
C    15.0.0.0/8 is directly connected, Serial0

Step 6(A): Verifying the OSPF neighbors on the Router R1.

RA#show ip ospf neighbor

Neighbor ID     Pri        State             Dead Time   Address         Interface
20.0.0.20            1       FULL/  -        00:00:36    15.0.0.2         Serial0

Step 6(B): Verifying the OSPF neighbors on the Router R2.

RB#show ip ospf neighbor

Neighbor ID     Pri        State             Dead Time   Address       Interface
15.0.0.1              1       FULL/  -        00:00:36    15.0.0.1      Serial0

Step 7(A): Verifying the OSPF interfaces on the Router R1.

RA#show ip ospf interface

Ethernet0 is up, line protocol is up
  Internet Address 10.0.0.20/8, Area 0
  Process ID 64, Router ID 15.0.0.1, Network Type BROADCAST, Cost: 10
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 15.0.0.1, Interface address 10.0.0.20
  No backup designated router on this network
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
<Output Omitted>

Serial0 is up, line protocol is up
  Internet Address 15.0.0.1/8, Area 0
  Process ID 64, Router ID 15.0.0.1, Network Type POINT_TO_POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
<Output Omitted>

Step 7(B): Verifying the OSPF interfaces on the Router R2.

RB#show ip ospf interface

Ethernet0 is up, line protocol is up
  Internet Address 20.0.0.20/8, Area 0
  Process ID 64, Router ID 20.0.0.20, Network Type BROADCAST, Cost: 10
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 20.0.0.20, Interface address 20.0.0.20
  No backup designated router on this network
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
<Output Omitted>

Serial0 is up, line protocol is up
  Internet Address 15.0.0.2/8, Area 0
  Process ID 64, Router ID 20.0.0.20, Network Type POINT_TO_POINT, Cost: 64
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
<Output Omitted>

Step 8(A): Verifying the OSPF database on the Router R1.

RA#show ip ospf database

       OSPF Router with ID (15.0.0.1) (Process ID 64)

                Router Link States (Area 0)

Link ID        ADV Router         Age               Seq#                   Checksum        Link count
15.0.0.1         15.0.0.1             2040        0x80000004            0x7C99                       3
20.0.0.20       20.0.0.20           708          0x80000006            0x9957                        3

Step 8(B): Verifying the OSPF database on the Router R2.

RB#show ip ospf database

       OSPF Router with ID (20.0.0.20) (Process ID 64)

                Router Link States (Area 0)

Link ID          ADV Router      Age                   Seq#                Checksum        Link count
15.0.0.1         15.0.0.1              105                 0x80000005      0x7A9A         3
20.0.0.20       20.0.0.20            820                 0x80000006      0x9957          3

Step 9: Verifying the connection of Host ‘A’ & Host ‘B’.

C:\>ping 20.0.0.1

Pinging 20.0.0.1 with 32 bytes of data:

Reply from 20.0.0.1: bytes=32 time=20ms TTL=254
Reply from 20.0.0.1: bytes=32 time=20ms TTL=254
Reply from 20.0.0.1: bytes=32 time=10ms TTL=254
Reply from 20.0.0.1: bytes=32 time=10ms TTL=254

Ping statistics for 20.0.0.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 10ms, Maximum =  20ms, Average =  15ms

 ii. Broadcast-Multi-Access Environment

The specifications of broadcast-multi-access environment are

  1. Router dynamically detects its neighboring router using the hello packets.
  2. DR/BDR Election: Adjacency is automatic as soon as the two routers can communicate.
  3. OSPF packets are always sent as a multicast to 224.0.0.5

Diagram




Procedure

  1. Configuring & Assigning the IP addresses on the routers R1 & R2.
  2. Check the routing table on both the routers.
  3. Enable the OSPF protocol on both routers so that hosts on the both routers can communicate with each other.
  4. Verifying the Routing protocols on the Router.
  5. Check the routing table on both the routers after enabling the OSPF on both sides.
  6. Verifying the OSPF neighbors on the routers.
  7. Verifying the OSPF interfaces on the routers.
  8. Verifying the OSPF database on the routers. 
Configuration         

Step 1(A): Assigning the IP addresses on the Router R1.

R1(config)#interface ethernet 0
R1(config-if)#ip address 10.0.0.10 255.0.0.0
R1(config-if)#no shutdown
R1(config-if)#end

Step 1(B): Assigning the IP addresses on the Router R2.

R2(config)#interface ethernet 0
R2(config-if)#ip address 10.0.0.20 255.0.0.0
R2(config-if)#no shutdown
R2(config-if)#exit

Step 2(A): Check the Routing table of the Router R1.

RA#sh ip route

C    10.0.0.0/8 is directly connected, Ethernet0

Step 2(B): Check the Routing table of the Router R2.

RB#sh ip route

C    10.0.0.0/8 is directly connected, Ethernet0

Step 3(A): Enable the OSPF protocol on the Router R1.

RA(config)#router ospf 64
RA(config-router)#network 10.0.0.0 0.255.255.255 area 0 (Network to be advertised)

Step 3(B): Enable the OSPF protocol on the Router R2.

RB(config)#router ospf 64
RB(config-router)#network 10.0.0.0 0.255.255.255 area 0 (Network to be advertised)
  
Step 4(A): Check the Routing Protocol on the Router R1.

RA#show ip protocols

Routing Protocol is "ospf 64"

  Redistributing: ospf 64

  Routing for Networks:
    10.0.0.0

  Routing Information Sources:
    Gateway         Distance      Last Update

  Distance: (default is 110)

Step 4(B): Check the Routing Protocol on the Router R2.

RB#show ip protocols

Routing Protocol is "ospf 64"

  Redistributing: ospf 64

  Routing for Networks:
    10.0.0.0

  Routing Information Sources:
    Gateway         Distance      Last Update

  Distance: (default is 110)

Step 5(A): Check the Routing table of the Router R2 after enabling OSPF.

RA#sh ip route

C    10.0.0.0/8 is directly connected, Ethernet0

Step 5(B): Check the Routing table of the Router R2 after enabling OSPF.

RB#sh ip route

C    10.0.0.0/8 is directly connected, Ethernet0

Step 6(A): Verifying the OSPF neighbors on the Router R1.

RA#show ip ospf neighbor

Neighbor ID     Pri   State                     Dead Time   Address         Interface
10.0.0.20            1    FULL/BDR        00:00:30    10.0.0.20       Ethernet0

Step 6(B): Verifying the OSPF neighbors on the Router R2.

RB#show ip ospf neighbor

Neighbor ID     Pri   State                     Dead Time   Address                Interface
10.0.0.10            1    FULL/DR         00:00:32    10.0.0.10               Ethernet0

Step 7(A): Verifying the OSPF interfaces on the Router R1.

RA#show ip ospf interface

Ethernet0 is up, line protocol is up
  Internet Address 10.0.0.10/8, Area 0
  Process ID 64, Router ID 10.0.0.10, Network Type BROADCAST, Cost: 10
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 10.0.0.10, Interface address 10.0.0.10
  Backup Designated router (ID) 10.0.0.20, Interface address 10.0.0.20
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
<Output Omitted>
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.0.0.20  (Backup Designated Router)

Step 7(B): Verifying the OSPF interfaces on the Router R2.

RB#show ip ospf interface

Ethernet0 is up, line protocol is up
  Internet Address 10.0.0.20/8, Area 0
  Process ID 64, Router ID 10.0.0.20, Network Type BROADCAST, Cost: 10
  Transmit Delay is 1 sec, State BDR, Priority 1
  Designated Router (ID) 10.0.0.10, Interface address 10.0.0.10
  Backup Designated router (ID) 10.0.0.20, Interface address 10.0.0.20
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:05
  Neighbor Count is 1, Adjacent neighbor count is 1
    Adjacent with neighbor 10.0.0.10  (Designated Router)

Step 8(A): Verifying the OSPF database on the Router R1.

RA#show ip ospf database

       OSPF Router with ID (10.0.0.10) (Process ID 64)

                Router Link States (Area 0)

Link ID         ADV Router      Age                    Seq#                Checksum        Link count
10.0.0.10       10.0.0.10           754                  0x80000002        0xB424                   1
10.0.0.20       10.0.0.20           754                  0x80000002        0xA01A      1
                Net Link States (Area 0)

Link ID         ADV Router      Age                    Seq#                Checksum
10.0.0.10       10.0.0.10           754                  0x80000001    0x548B

Step 8(B): Verifying the OSPF database on the Router R2.

RB#show ip ospf database

       OSPF Router with ID (10.0.0.20) (Process ID 64)

                Router Link States (Area 0)

Link ID         ADV Router      Age                    Seq#                Checksum        Link count
10.0.0.10       10.0.0.10           1061                0x80000002    0xB424           1
10.0.0.20       10.0.0.20             181                0x80000003    0xC11F           1

                Net Link States (Area 0)

Link ID         ADV Router      Age                    Seq#                Checksum
10.0.0.10       10.0.0.10           1062                0x80000001    0x548B

Posted by Knowledge for You at 10:47

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