Tugas CCNA 3 Lab 6.2.4 Part B: Configuring and Verifying Multi-access OSPF

Diposting oleh Andrizda_Pratama

 Lab 6.2.4 Part B: Configuring and Verifying Multi-access OSPF
Step 1: Connect the equipment
Connect the Fa0/0 interface of each router to the switch using a straight-through cable. Three routers are sharing a common Ethernet multi-access network, 192.168.1.0/24. Each router will be configured with an IP address on the FastEthernet interface and a loopback address for the router ID.
Step 2: Perform basic configurations on the routers
Step 3: Configure and activate Ethernet and Loopback addresses
Step 4: Verify IP addressing and interfaces
  1. Use the show ip interface brief or the show protocols command to verify that the IP addressing is correct and that the interfaces are active.
  2. After all interfaces are verified, be sure to save the running configuration to the NVRAM of the router.
Step 5: Configure OSPF on the DR router
The DR and BDR election process takes place as soon as the first router has its interface enabled for OSPF on the multi-access network. If OSPF is already configured for an interface, this can happen as the routers are powered on.
Step 6: Configure OSPF on the BDR router
  1. Configure the OSPF process on the router with the second highest router ID to ensure that this router becomes the BDR. Use the router ospf command in global configuration mode to enable OSPF on the R2 router.  What console message was displayed as a result of the OSPF commands on R2 and what does this mean? Jawaban: An OSPF adjacency message displayed indicating an adjacency was formed with the R3 router (Nbr 192,168.31.33). When the hello packet is received, the neighbor relationship is formed.
00:08:51: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.31.33 on
FastEthernet0/0 from LOADING to FULL, Loading Done
  1. Use the show ip ospf interface command to verify that the OSPF has been configured correctly and that R2 is the BDR.
Step 7: Configure OSPF on the DRother router
  1. Configure the OSPF process on the router with the lowest router ID last. This router will be designated as DRother instead of DR or BDR. Use the router ospf command in global configuration mode to enable OSPF on the R1 router
  2. Use the show ip ospf interface command to verify that the OSPF has been configured correctly and that R1 is a DRother.
Step 8: Use the OSPF priority to determine the DR and BDR
  1. Use the ip ospf priority interface command to change the OSPF priority of the R1 router to 255. This is the highest possible priority.
  2. Use the ip ospf priority interface command to change the OSPF priority of the R3 router to 100.
  3. Use the ip ospf priority interface command to change the OSPF priority of the R2 router to 0. A priority of 0 causes the router to be ineligible to participate in an OSPF election and become a DR or BDR.
  4. Shut down and re-enable the FastEthernet0/0 interfaces to force an OSPF election. As the interfaces are shut down, the OSPF adjacencies are lost.
Step 9: Reflection
  1. When the OSPF process starts, what happens if there is no active interface on the router? Jawaban: OSPF will not start.
  2. What can be done to ensure there will be an active interface on a router? Jawaban: Configure a loopback interface.
  3. How are the DR and BDR elected in an OSPF network? Jawaban: The DR is chosen with the highest OSPF priority value. The BDR is chosen with the second highest priority value. If the priority is the same, the OSPF election for DR is decided on the highest Router ID.
  4. What OSPF interface priority value prevents a router from being elected as a DR? jawaban: 0

Category: 0 komentar

Tugas CCNA 3 Lab 6.2.4 Part A: Configuring and Verifying Point-to-Point OSPF

Diposting oleh Andrizda_Pratama

Lab 6.2.4 Part A: Configuring and Verifying Point-to-Point OSPF
Step 1: Connect the equipment
  1. Connect the Fa0/0 interface of each router to the Fa0/1 interface of each switch using a straightthrough cable.
  2. Connect each host to the Fa0/2 switch port of each switch using a straight-through cable.
  3. Connect serial cables from each router to the other router as shown in the topology.
Step 2: Perform basic configurations on the routers
  1. Connect a PC to the console port of the router to perform configurations using a terminal emulation program.
  2. On all routers, configure the hostname, passwords, and message-of-the-day banner and disable DNS lookups according to the addressing table and topology diagram.
Step 3: Configure the router interfaces
Step 4: Verify IP addressing and interfaces
  1. Use the show ip interface brief or the show protocols command to verify that the IP addressing is correct and that the interfaces are active.
  2. After all interfaces are verified, be sure to save the running configuration to the NVRAM of the router.
Step 5: Configure Ethernet interfaces of PC1, PC2, and PC3
  1. Configure the Ethernet interfaces of PC1, PC2, and PC3 with the IP addresses and default gateways from the addressing table.
  2. Test the PC configuration by pinging the default gateway from each PC.
Step 6: Configure OSPF on Router 1
  1. Configure OSPF on the R1 router. Enter a process ID of 1 for the process-ID parameter. R1(config)#router ospf 1
  2. Configure the network statement for the LAN. When you are in the Router OSPF configuration submode, configure the LAN 172.16.1.16/28 to be included in the OSPF updates that are sent out of R1. Use an area ID of 0 for the OSPF area-id parameter. Zero will be used for the OSPF area ID in all network statements in this topology.
R1(config-router)#network 172.16.1.16 0.0.0.15 area 0
  1. Configure the router to advertise the 192.168.10.0/30 network attached to the Serial 0/0/0 interface.
R1(config-router)#network 192.168.10.0 0.0.0.3 area 0
  1. Configure the router to advertise the 192.168.10.4/30 network attached to the Serial 0/0/1 interface. R1(config-router)#network 192.168.10.4 0.0.0.3 area 0
  2. Return to privileged EXEC mode and save the configuration.
Step 7: Configure OSPF on the R2 router
  1. Enable OSPF routing on the R2 router using the router ospf command. Use a process ID of 1.
R2(config)#router ospf 1
  1. Configure the router to advertise the LAN network 10.10.10.0/24 in the OSPF updates.
R2(config-router)#network 10.10.10.0 0.0.0.255 area 0
Step 8: Configure OSPF on the R3 router
Configure OSPF on the R3 router using the router ospf and network commands. Use a process ID of 1. Configure the router to advertise the three directly connected networks. When you are finished, return to privileged EXEC mode.
Step 9: Configure OSPF router IDs
  1. The OSPF router ID is used to uniquely identify the router in the OSPF routing domain. A router ID is an IP address. Cisco routers derive the router ID in one of three ways, and with the following precedence:
  2. Examine the current router IDs in the topology.
  3. The router ID can also be seen in the output of the show ip protocols, show ip ospf, and show ip ospf interfaces commands.
Step 10: Verify OSPF operation
  1. On the R1 router, use the show ip ospf neighbor command to view the information about the
  2. On the R1 router, use the show ip protocols command to view information about the routing protocol operation.
Step 11: Examine OSPF routes in the routing tables
View the routing table on the R1 router. OSPF routes are denoted in the routing table with an O.
Step 12: Configure OSPF cost
  1. Use the show ip route command on the R1 router to view the OSPF cost to reach the 10.10.10.0/24 network.
  2. Use the show interfaces serial0/0/0 command on the R1 router to view the bandwidth of the Serial 0/0/0 interface.
Step 13: Reflection
What are some advantages of using OSPF as a routing protocol? Jawaban: supports VLSM and CIDR, uses cost metrics to choose the best path, and each router has a complete picture of the entire network.

Category: 0 komentar

Tugas CCNA 3 Lab 6.2.3 Controlling a DR/BDR Election

Diposting oleh Andrizda_Pratama

Lab 6.2.3 Controlling a DR/BDR Election
Step 1: Connect the equipment
Connect each of the router Fa0/0 interfaces to any port on the switch using a straight-through cable.
Step 2: Perform basic configuration on the routers.
  1. Connect a PC to the console port of the router to perform configurations using a terminal emulation program.
  2. Configure Routers 1, 2, and 3 with a hostname, and console, Telnet, and privileged passwords according to the table diagram.
Step 3: Configure single area OSPF routing on the routers
Configure basic OSPF routing on the routers. All networks are in Area 0.
Step 4: Verify current OSPF operation
  1. Now that the Ethernet interfaces and OSPF have been configured, OSPF should be operational between the routers. Because this is a multi-access network, a DR/BDR election should have occurred.
  2. Use the show ip ospf neighbor command on all the routers to verify operation. The output should be similar to what is shown below.
Step 5: Configure router loopback interfaces
  1. Configuring loopback interfaces for OSPF operation serves two purposes: 1) Because loopback interfaces are logical interfaces and never go down, it ensures that the router ID will never change. 2) Configuring loopback interfaces allows control over the DR/BDR election.
  2. Configure the loopback interfaces as shown in the addressing table on the first page.
  3. Use the show ip ospf neighbor detail command on R1 to view the DR/BDR status. Have the DR and BDR routers changed? __________ No
  4. Once elected, the DR and the BDR do not change unless the interfaces all cycle or the OSPF processes are reset. Use the clear ip ospf 1 process command on all routers to reset the OSPF processes.
  5. After the processes have been reset, use the show ip ospf neighbor detail command to recheck the DR/BDR status.
Step 6: Use router interface priority to determine DR election
  1. Another method that is used to determine the DR/BDR election is router interface priority. Use the show ip ospf interface command to determine the default priority settings on the routers.
  2. Configure interface priorities on R1 and R2 to determine the DR/BDR election results.
  3. Use the show ip ospf neighbor command to determine the DR and BDR. Have the DR and the BDR changed? __________ No
  4. Use the clear ip ospf 1 process command on all of the routers to reset the OSPF processes.
Step 7: Reflection
List the criteria used from highest to lowest for determining the DR on an OSPF network. Jawaban: Highest is interface priority. Next is highest router ID which is determined by the highest loopback address, or in the event of no loopbacks being configured, it is the highest active interface address.

Category: 0 komentar

Tugas CCNA 3 Lab 6.2.2 Configuring OSPF Authentication

Diposting oleh Andrizda_Pratama

Lab 6.2.2 Configuring OSPF Authentication
Step 1: Connect the equipment
  1. Connect Router 1 Serial 0/0/0 interface to Router 2 Serial 0/0/0 interface using a serial cable.
  2. Connect Router 1 Fa0/0 interface to Switch 1 Fa0/1 port using a straight-through cable.
  3. Connect each PC with a console cable to perform configurations on the router and switches.
  4. Connect Host 1 to the Switch 1 Fa0/2 port using a straight-through cable.
  5. Connect a crossover cable between Host 2 and the Fa0/0 interface of Router 2.
Step 2: Perform basic configuration on the routers
  1. Connect a PC to the console port of the routers to perform configurations using a terminal emulation program.
  2. Configure Router 1 with a hostname, console, Telnet, and privileged passwords according to the table diagram.
  3. Configure Router 2 with a hostname, console, Telnet, and privileged passwords according to the table diagram.
Step 3: Configure and verify OSPF on the routers
  1. Configure single area OSPF on R1 and R2. All interfaces will belong to Area 0.
  2. Verify the OSPF configuration using the show ip route command on both routers.
Step 4: Configure and verify OSPF authentication
OSPF allows for both plain text authentication and encrypted authentication.
Step 5: Reflection
  1. Why would OSPF authentication be configured in a network? Jawaban: To prevent unauthorized access to routing information or to prevent unauthorized injection of routing information into the network. Routers in an OSPF area will only form adjacencies with other routers that have authentication set.
  2. Can one OSPF area have different OSPF configuration parameters than another area?Jawaban: Yes, configuration is on a per area basis.
  3. Can a single OSPF router have multiple authentication passwords configured? Jawaban: Yes, different areas can be configured differently as well as different interfaces.

Category: 0 komentar

Tugas CCNA 3 Lab 6.2.1 Configuring and Verifying Single Area OSPF

Diposting oleh Andrizda_Pratama

Lab 6.2.1 Configuring and Verifying Single Area OSPF
Step 1: Connect the equipment
  1. Connect Router 1 Serial 0/0/0 interface to Router 2 Serial 0/0/0 interface using a serial cable.
  2. Connect Router 1 Fa0/0 interface to Switch 1 Fa0/1 port using a straight-through cable.
  3. Connect each PC with a console cable to perform configurations on the router and switches.
  4. Connect Host 1 to the Switch 1 Fa0/2 port using a straight-through cable.
  5. Connect a crossover cable between Host 2 and the Fa0/0 interface of Router 2.
Step 2: Perform basic configuration on Router 1
  1. Connect a PC to the console port of the router to perform configurations using a terminal emulation program.
  2. Configure Router 1 with a hostname, interfaces, console, Telnet, IP addresses, and privileged passwords according to the table and topology diagram. Save the configuration.
Step 3: Perform basic configuration on Router 2
Perform basic configuration on Router 1 as the gateway router with a hostname, interfaces, console, Telnet, and privileged passwords according to the table and topology diagram. Save the configuration.
Step 4: Perform basic configuration on Switch 1
Configure Switch 1 with a hostname, console, Telnet, and privileged passwords according to the table and topology diagram.
Step 5: Configure the hosts with the proper IP address, subnet mask, and default gateway
1. Configure each host with the proper IP address, subnet mask, and default gateway.
1) Host 1 should be assigned 192.168.1.130/26 and the default gateway of 192.168.1.129.
2) Host 2 should be assigned 192.168.0.2/24 and the default gateway of 192.168.0.1.
2. Each workstation should be able to ping the attached router. If the ping was not successful, troubleshoot as necessary. Check and verify that the workstation has been assigned a specific IP
address and default gateway.
Step 6: Verify that the network is functioning
  1. From the attached hosts, ping the FastEthernet interface of the default gateway router.
Was the ping from the first host successful? yes
Was the ping from the second host successful? yes
If the answer is no for either question, troubleshoot the router and host configurations to find the error.
Ping again until they are both successful.
  1. Use the command show ip interface brief and check the status of each interface. What is the state of the interfaces on each router?
R1:
FastEthernet 0/0: __________________ up
Serial 0/0/0: ________________________ up
Serial 0/0/1: ________________________ administratively down
R2:
FastEthernet 0/0: __________________ up
Serial 0/0/0: ________________________ up
Serial 0/0/1: ________________________ administratively down
  1. Ping from one of the router connected serial interfaces to the other connected serial interface. Was the ping successful? Jawaban: Ya

Step 7: Configure OSPF routing on R1
  1. Configure an OSPF routing process on router R1. Use OSPF process number 1 and ensure that all networks are in Area 0.
Step 8: Configure OSPF routing on R2
  1. Configure an OSPF routing process on router R2. Use OSPF process number 1 and ensure that all networks are in Area 0.
  2. Examine the R2 running configuration. Did the IOS automatically add any lines under the router ospf 1 command?Jawaban: yes
Step 8: Test network connectivity
Ping Host 2 from Host 1.
Was it successful?Jawaban:  yes
If the answer is no, troubleshoot to find the error. Ping again until successful.
Step 9: Reflection
  1. What is an advantage of using OSPF as the routing protocol in a network? Jawaban: that OSPF is efficient, provides fast convergence, and scales well in large networks.
  2. What is a disadvantage of using OSPF as the routing protocol in a network? Jawaban: that OSPF is more difficult to configure and requires proper planning.

Category: 0 komentar

Tugas CCNA 3 Lab 5.4.2.4 EIGRP Configuring Automatic and Manual Route Summarization and Discontiguous Subnets

Diposting oleh Andrizda_Pratama

Lab 5.4.2.4 EIGRP Configuring Automatic and Manual Route Summarization and Discontiguous Subnets
Step 1: Connect the equipment
  1. Connect Router1 to Router2 and Router3 using serial cables.
  2. Connect Router2 to Router3 using serial cables.
  3. Connect a PC with a console cable to perform configurations on the routers.
Step 2: Perform basic configurations on the routers
  1. Establish a console session with Router1 and configure hostname, passwords, and interfaces as described in the table. Save the configuration.
  2. Establish a console session with Router2 and perform a similar configuration, using the addresses and other information from the table. Save the configuration.
  3. Establish a console session with Router3. Configure hostname, passwords, and interfaces according to the table. Save the configuration.
Step 3: Configure EIGRP routing with default commands
  1. On Gateway, configure EIGRP as the routing protocol with an autonomous system number of 100, and advertise the appropriate networks.
  2. On Branch1, configure EIGRP as the routing protocol with an autonomous system number of 100, and advertise the appropriate networks:
  3. Perform a similar configuration on Branch2, using EIGRP 100 and advertising the appropriate networks.
Step 4: Verify the routing configuration
  1. View the routing table on Gateway.
  2. Which subnets are not reported in this output? Jawaban: The subnets configured for the 172.16.0.0 and 172.17.0.0 networks are absent.
  3. Why are there two paths reported for the 10.0.0.8/30 route? Jawaban: Because no bandwidth commands have been configured, EIGRP has two equal-cost paths to report.
Step 5: Remove Automatic summarization
On each of the three routers, remove automatic summarization to force EIGRP to report all subnets. A sample command is given for Gateway.
Step 6: Verify the routing configuration
View the routing table again on Gateway.
Step 7: Configure manual summarization
On Branch2, configure manual summarization to force EIGRP to summarize only the 172.17.0.0 subnets.
Step 8: Reflection
  1. Although removing automatic summarization solved the issue of missing subnets, what possible problem could it cause? Jawaban: The routing table is very long, and that will slow down the lookup process.
  2. How could removing automatic summarization help in troubleshooting an EIGRP network? Jawaban: Checking the output against all possible subnets will reveal which subnet(s) are missing. Those are the connections and configurations that need to be checked.
How did the use of loopback interfaces make this lab easier to complete? Jawaban: Less equipment required, less time to set up and cable equipment.

Category: 0 komentar

Tugas CCNA 3 Lab 5.4.1.4 Implementing EIGRP

Diposting oleh Andrizda_Pratama

Lab 5.4.1.4 Implementing EIGRP
Step 1: Connect the equipment
  1. Connect Router1 to Router2 and Router3 using serial cables.
  2. Connect Router2 to Router3 using serial cables.
  3. Connect a PC with a console cable to perform configurations on the routers.
Step 2: Perform basic configurations on the routers
  1. Establish a console session with Router1 and configure hostname, passwords, and interfaces as described in the table. Save the configuration.
  2. Establish a console session with Router2 and perform a similar configuration, using the addresses and other information from the table. Save the configuration.
  3. Establish a console session with Router3. Configure hostname, passwords, and interfaces according to the table. Save the configuration.
Step 3: Configure EIGRP routing with default commands
  1. On Gateway, configure EIGRP as the routing protocol with an autonomous system number of 100, and advertise the appropriate networks.
Gateway(config)#router eigrp 100
Gateway(config-router)#network 10.0.0.0
Gateway(config-router)#network 10.0.0.4
Predict: How will EIGRP report these subnets in the routing table?
Step 4: Configure MD5 Authentication
  1. Create a keychain named discchain.
  2. Configure a key 1 that has a key string of san-fran.
  3. Enable the workgroup router to utilize EIGRP MD5 authentication with each of your EIGRP neighbors and to use the keychain icndchain.
Step 5: Reflection
  1. What is the importance of enabling authentication on the routing updates?
Step 1: Connect the equipment
  1. Connect Router1 to Router2 and Router3 using serial cables.
  2. Connect Router2 to Router3 using serial cables.
  3. Connect a PC with a console cable to perform configurations on the routers.
Step 2: Perform basic configurations on the routers
  1. Establish a console session with Router1 and configure hostname, passwords, and interfaces as described in the table. Save the configuration.
  2. Establish a console session with Router2 and perform a similar configuration, using the addresses and other information from the table. Save the configuration.
  3. Establish a console session with Router3. Configure hostname, passwords, and interfaces according to the table. Save the configuration.
Step 3: Configure EIGRP routing with default commands
  1. On Gateway, configure EIGRP as the routing protocol with an autonomous system number of 100, and advertise the appropriate networks.
Gateway(config)#router eigrp 100
Gateway(config-router)#network 10.0.0.0
Gateway(config-router)#network 10.0.0.4
Predict: How will EIGRP report these subnets in the routing table?
Step 4: Configure MD5 Authentication
  1. Create a keychain named discchain.
  2. Configure a key 1 that has a key string of san-fran.
  3. Enable the workgroup router to utilize EIGRP MD5 authentication with each of your EIGRP neighbors and to use the keychain icndchain.
Step 5: Reflection
  1. What is the importance of enabling authentication on the routing updates?

Category: 0 komentar
Langganan: Postingan (Atom)