NCS Lab 2: Configuring Single Area OSPF Within Service Provider

Configuring Single Area OSPF Within Service Provider

In Lab 2: Configuring Single Area OSPF Within Service Provider, participants typically engage in the practical application of configuring Open Shortest Path First (OSPF) routing protocol within a Service Provider network environment using Cisco Network Convergence System (NCS) devices. This lab involves tasks such as enabling OSPF on router interfaces, defining OSPF router IDs, and configuring OSPF areas. Participants may also explore OSPF attributes, such as router types and OSPF network types, to customize the behavior of OSPF within the single area. The lab aims to provide hands-on experience in implementing OSPF, a key routing protocol used in Service Provider networks for dynamic and scalable routing. Successful completion of NCS Lab 2 equips participants with practical skills in configuring OSPF, contributing to the establishment of robust and efficient communication within the Service Provider network.

Lab:

Task 1: Configuration of IP Addresses with Service Provider

The following configuration needs to be configured

IP addressing for all nodes including Physical and Software Interfaces.

Task 2: Verify IP Addresses Configured within the Service Provider.

PE1#show ip interface brief

Interface                  	IP-Address	        OK? Method 	Status               	    Protocol
Ethernet0/0                	unassigned      	YES unset  	administratively down 	    down    
Ethernet0/1                	unassigned      	YES unset  	administratively down 	    down    
Ethernet0/2                	10.0.23.2       	YES manual 	up                          up      
Ethernet0/3                	unassigned      	YES unset  	administratively down 	    down    
Loopback1                  	2.2.2.2         	YES manual 	up                          up      
RP/0/0/CPU0:P1#show  ipv4 interface brief
Interface                      	IP-Address	        Status		        Protocol 	Vrf-Name
Loopback1                      	3.3.3.3         	Up              	Up       	default 
MgmtEth0/0/CPU0/0              	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/0         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/1         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/2         	10.0.23.3       	Up              	Up       	default 
GigabitEthernet0/0/0/3         	10.0.34.3       	Up              	Up       	default 
GigabitEthernet0/0/0/4         	unassigned      	Shutdown        	Down     	default
RP/0/0/CPU0:RR1#show ipv4 interface brief
Interface                      	IP-Address      	Status          	Protocol 	Vrf-Name
Loopback1                      	4.4.4.4         	Up              	Up       	default 
MgmtEth0/0/CPU0/0              	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/0         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/1         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/2         	10.0.45.4       	Up              	Up       	default 
GigabitEthernet0/0/0/3         	10.0.34.4       	Up              	Up       	default 
GigabitEthernet0/0/0/4         	unassigned      	Shutdown        	Down     	default
P2#show ip interface brief
Interface                  	IP-Address	        OK? Method 	Status                		Protocol
Ethernet0/0                	unassigned      	YES NVRAM  	administratively down           down    
Ethernet0/1                	unassigned      	YES NVRAM  	administratively down           down    
Ethernet0/2                	10.0.45.5       	YES NVRAM  	up                    		up      
Ethernet0/3                	10.0.56.5       	YES NVRAM  	up                    		up      
Loopback1                  	5.5.5.5         	YES NVRAM  	up                    		up
    
RP/0/0/CPU0:PE2#show ipv4 interface brief
Interface                      	IP-Address	        Status		        Protocol	Vrf-Name
Loopback1                      	6.6.6.6         	Up              	Up       	default 
MgmtEth0/0/CPU0/0              	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/0         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/1         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/2         	unassigned      	Shutdown        	Down     	default 
GigabitEthernet0/0/0/3         	10.0.56.6       	Up              	Up       	default 
GigabitEthernet0/0/0/4         	unassigned      	Shutdown        	Down     	default

Task 3: Configure OSPF within AS 3

Use the following parameters to configure OSPF within the Service Provider

PE1:

PE1#configure terminal 
PE1(config)#router ospf 1
PE1(config-router)#interface loopback 1
PE1(config-if)#ip ospf 1 area 0
PE1(config)#interface Ethernet 0/2
PE1(config-if)#ip ospf 1 area 0           
PE1(config-if)#end
PE1#write memory 

P1::

RP/0/0/CPU0:P1#configure 
RP/0/0/CPU0:P1(config)#router ospf 1
RP/0/0/CPU0:P1(config-ospf)#area 0
RP/0/0/CPU0:P1(config-ospf-ar)#interface g0/0/0/2
RP/0/0/CPU0:P1(config-ospf-ar-if)#interface g0/0/0/3
RP/0/0/CPU0:P1(config-ospf-ar-if)#interface loopback 1
RP/0/0/CPU0:P1(config-ospf-ar-if)#commit
RP/0/0/CPU0:P1(config-ospf-ar-if)#end 

RR1:

RP/0/0/CPU0:RR1#configure
RP/0/0/CPU0:RR1(config)#router ospf 1
RP/0/0/CPU0:RR1(config-ospf)#area 0
RP/0/0/CPU0:RR1(config-ospf-ar)#interface loopback1
RP/0/0/CPU0:RR1(config-ospf-ar-if)#interface g0/0/0/2
RP/0/0/CPU0:RR1(config-ospf-ar-if)#interface g0/0/0/3
RP/0/0/CPU0:RR1(config-ospf-ar-if)#commit
RP/0/0/CPU0:RR1(config-ospf-ar-if)#end

P2:

P2#configure terminal 
P2(config)#router ospf 1
P2(config)#interface loopback 1
P2(config-if)#ip ospf 1 area 0  
P2(config)#interface Ethernet 0/2
P2(config-if)#ip ospf 1 area 0           
P2(config-if)#interface Ethernet 0/3
P2(config-if)#ip ospf 1 area 0           
P2(config-if)#end
P2#write memory 

PE2:

RP/0/0/CPU0:PE2#configure 
RP/0/0/CPU0:PE2(config)#router ospf 1
RP/0/0/CPU0:PE2(config-ospf)#area 0
RP/0/0/CPU0:PE2(config-ospf-ar)#interface loopback 1
RP/0/0/CPU0:PE2(config-ospf-ar)#interface gigabitEthernet 0/0/0/3
RP/0/0/CPU0:PE2(config-ospf-ar-if)#commit
RP/0/0/CPU0:PE2(config-ospf-ar-if)#end

Task 4: Verify OSPF Routes.

Verify all routes within the routing table of all Provider devices.

PE1#show ip route ospf 

O    3.3.3.3 \[110/2\] via 10.0.23.3, 00:33:15, Ethernet 0/3
O    4.4.4.4 \[110/3\] via 10.0.23.3, 00:32:07, Ethernet 0/3
O    5.5.5.5 \[110/4\] via 10.0.23.3, 00:29:17, Ethernet 0/3
O    10.0.34.0/24 \[110/2\] via 10.0.23.3, 00:31:09, Ethernet 0/3
O    10.0.45.0/24 \[110/3\] via 10.0.23.3, 00:32:07, Ethernet 0/3
O    10.0.56.0/24 \[110/4\] via 10.0.23.3, 00:29:17, Ethernet 0/3
RP/0/0/CPU0:RR1#show route ipv4 unicast ospf 
O    2.2.2.2/32 \[110/3\] via 10.0.34.3, 00:35:35, GigabitEthernet0/0/0/3 
O    3.3.3.3/32 \[110/2\] via 10.0.34.3, 00:35:35, GigabitEthernet0/0/0/3 
O    5.5.5.5/32 \[110/2\] via 10.0.45.5, 00:32:41, GigabitEthernet0/0/0/2 
O    6.6.6.6/32 \[110/3\] via 10.0.45.5, 00:30:03, GigabitEthernet0/0/0/2 
O    10.0.23.0/24 \[110/2\] via 10.0.34.3, 00:35:35, GigabitEthernet0/0/0/3 
O    10.0.56.0/24 \[110/2\] via 10.0.45.5, 00:32:41, GigabitEthernet0/0/0/2
RP/0/0/CPU0:P1#show route ipv4 unicast ospf

O    2.2.2.2/32 \[110/2\] via 10.0.23.2, 00:35:52, GigabitEthernet0/0/0/2
O    4.4.4.4/32 \[110/2\] via 10.0.34.4, 00:34:45, GigabitEthernet0/0/0/3
O    5.5.5.5/32 \[110/3\] via 10.0.34.4, 00:31:50, GigabitEthernet0/0/0/3
O    6.6.6.6/32 \[110/4\] via 10.0.34.4, 00:29:12, GigabitEthernet0/0/0/3
O    10.0.45.0/24 \[110/2\] via 10.0.34.4, 00:34:45, GigabitEthernet0/0/0/3
O    10.0.56.0/24 \[110/3\] via 10.0.34.4, 00:31:50, GigabitEthernet0/0/0/3
P2#show ip route ospf 

O    2.2.2.2 \[110/4\] via 10.0.45.4, 00:34:24, Ethernet 0/2
O    3.3.3.3 \[110/3\] via 10.0.45.4, 00:34:24, Ethernet 0/2
O    4.4.4.4 \[110/2\] via 10.0.45.4, 00:34:24, Ethernet 0/2
O    6.6.6.6 \[110/2\] via 10.0.56.6, 00:31:51, Ethernet 0/3
O    10.0.23.0/24 \[110/3\] via 10.0.45.4, 00:34:24, Ethernet 0/2
O    10.0.34.0/24 \[110/2\] via 10.0.45.4, 00:34:24, Ethernet 0/2
RP/0/0/CPU0:PE2#show route ipv4 unicast ospf 

O    2.2.2.2/32 \[110/5\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3
O    3.3.3.3/32 \[110/4\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3
O    4.4.4.4/32 \[110/3\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3
O    5.5.5.5/32 \[110/2\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3
O    10.0.23.0/24 \[110/4\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3
O    10.0.34.0/24 \[110/3\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3
O    10.0.45.0/24 \[110/2\] via 10.0.56.5, 00:34:50, GigabitEthernet0/0/0/3

Task 5: Verify OSPF Neighborship.

PE1#show ip ospf neighbor 

Neighbor ID     	Pri   	State           Dead Time	Address         Interface
3.3.3.3           	1   	FULL/BDR       00:00:33    	10.0.23.3       Ethernet0/2
RP/0/0/CPU0:P1#show ospf neighbor 

Neighbor ID     	Pri   	State           Dead Time   	Address         Interface
2.2.2.2         	1     	FULL/DR         00:00:36    	10.0.23.2       GigabitEthernet0/0/0/2
4.4.4.4         	1     	FULL/DR         00:00:36    	10.0.34.4       GigabitEthernet0/0/0/3
RP/0/0/CPU0:RR1#show ospf neighbor 

Neighbor ID     	Pri   	State           Dead Time   	Address         Interface
5.5.5.5         	1     	FULL/DR         00:00:34    	10.0.45.5       GigabitEthernet0/0/0/2
3.3.3.3         	1     	FULL/DR         00:00:38    	10.0.34.3       GigabitEthernet0/0/0/3
PE1#show ip ospf neighbor 
Neighbor ID     	Pri   	State          Dead Time	Address         Interface
6.6.6.6           	1   	FULL/BDR       00:00:33    	10.0.56.6       Ethernet0/3
4.4.4.4           	1   	FULL/BDR       00:00:36    	10.0.45.4       Ethernet0/2
RP/0/0/CPU0:P1#show ospf neighbor 
Neighbor ID     	Pri   	State           Dead Time   	Address         Interface
5.5.5.5         	1     	FULL/BDR        00:00:36    	10.0.56.6       GigabitEthernet0/0/0/3

Task 6: Verify OSPF Interfaces.

PE1#show ip ospf interface brief

Interface    PID      Area      IP Address/Mask          Cost    State       Nbrs F/C
Lo1          1        0         2.2.2.2/32               1       LOOP        0/0
Et0/2        1        0         10.0.23.2/24             10      DR          1/1
RP/0/0/CPU0:RR1#show ospf interface brief 
Interfaces for OSPF 1

Interface    PID      Area     IP Address/Mask          Cost     State       Nbrs F/C
Lo1          1        0        4.4.4.4/32               1        LOOP        0/0
Gi0/0/0/2    1        0        10.0.45.5/24             1        BDR         1/1
Gi0/0/0/3    1        0        10.0.34.4/24             1        DR          1/1
P2#show ip ospf interface brief

Interface    PID    Area      IP Address/Mask            Cost     State       Nbrs F/C
Lo1          1      0         5.5.5.5/32                 1        LOOP        0/0
Et0/3        1      0         10.0.56.5/24               10       BDR         1/1
Et0/2        1      0         10.0.45.5/24               10       DR          1/1
RP/0/0/CPU0:PE2#show ospf interface brief 
Interfaces for OSPF 1

Interface    PID      Area     IP Address/Mask           Cost     State       Nbrs F/C
Lo1          1        0        6.6.6.6/32                1        LOOP        0/0
Gi0/0/0/3    1        0        10.0.56.6/24              1        DR          1/1