A.2.2 Pro Domain 2: Interface Configuration

In this small network, you need to configure CDP settings on the Branch1 switch and the SFO router in the branch office. In this lab, your task is to complete the following: On the Branch 1 switch:Enable CDP on the Branch1 switch.Configure the CDP timer settings to send CDP advertisements every 90 seconds.Configure the CDP timer settings to hold each advertisement in memory for 250 seconds.Save your changes to the startup-config file on both devices. On the SFO router:Enable CDP on the SFO router.On the SFO router, disable CDP for the Serial 0/1/1 interface.Configure the CDP timer settings to send CDP advertisements every 90 seconds.Configure the CDP timer settings to hold each advertisement in memory for 250 seconds.Save your changes to the startup--config file on both devices.

Configure the Branch 1 switch. Select Branch 1. Press Enter to get started. At the Branch1> prompt, type enable and press Enter. At the Branch1# prompt, type configure terminal and press Enter. At the Branch1(config)# prompt, type cdp timer 90 and press Enter. At the Branch1(config)# prompt, type cdp holdtime 250 and press Enter. At the Branch1# prompt, type exit and press Enter. At the Branch1# prompt, type copy running-config startup-config and press Enter. Press Enter to begin building the configuration. Configure the SFO router. Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type configure terminal and press Enter. At the SFO(config)# prompt, type cdp timer 90 and press Enter. At the SFO(config)# prompt, type cdp holdtime 250 and press Enter. At the SFO(config)# prompt, type int serial0/1/1 and press Enter. At the SFO(config-if)# prompt, type no cdp enable and press Enter. At the SFO(config-if)# prompt, type exit and press Enter. At the SFO(config)# prompt, type exit and press Enter. At the SFO# prompt, type copy running-config startup-config and press Enter. Press Enter to begin building the configuration.

You have an SFO router and an LAX router connected in a back-to-back configuration as shown in the diagram. The current configuration has one or more problems. The routers should have the following configuration: Addresses on the 10.0.0.68/30 network are used for the serial connection. The clock rate should be set to 56000. HDLC encapsulation is used. In this lab, your task is to: Use the following commands to diagnose the problem:show ip interfaceshow interfacesshow controllers Correct any issues you find. When you're finished, the status of each interface should be up, and you should be able to ping each router from the other router interface.

Explore SFO. Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type show ip interface brief and press Enter to verify the configuration of the Serial0/1/0 interface. The status indicates a Layer 2 problem with the serial link. A Layer 2 problem is typically caused by a mismatched encapsulation type. At the SFO# prompt, type show interfaces s0/1/0 and press Enter. Notice that the encapsulation for this SFO is set to PPP. Explore LAX. Select LAX. Press Enter to get started. At the LAX> prompt, type enable and press Enter. At the LAX# prompt, type show interfaces s0/1/1 and press Enter. Notice that the encapsulation for SFO is set to HDLC. On SFO, configure the Serial0/1/0 interface to use HDLC as follows: At the SFO# prompt, type conf t and press Enter. At the SFO(config)# prompt, type int s0/1/0 and press Enter. At the SFO(config-if)# prompt, type encapsulation hdlc and press Enter. Press Ctrl + Z. At the SFO# prompt, type show interfaces s0/1/0 and press Enter to verify that HDLC encapsulation is being used. At the SFO# prompt, type ping 10.0.0.73 and press Enter to verify connectivity with the LAX Serial0/1/1 interface. A failed ping test indicates a Layer 3 problem. Verify the following TCP/IP configuration on both routers: At the SFO# prompt, type show interfaces and press Enter. At the LAX# prompt, type show interfaces and press Enter. Make sure both interfaces are assigned an IP address. Make sure both interfaces are using the same subnet mask. Make sure the IP address assigned to both interfaces is on the same subnet. On LAX, assign the IP address 10.0.0.70/30 to the s0/1/1 interface. At the LAX# prompt, type conf t and press Enter. At the LAX(config)# prompt, type int s0/1/1 and press Enter. At the LAX(config-if)# prompt, type ip address 10.0.0.70 255.255.255.252 and press Enter. Press Ctrl + Z. From both routers, verify that you can ping the other router. At the LAX# prompt, type ping 10.0.0.69 and press Enter. At the SFO# prompt, type ping 10.0.0.70 and press Enter.

You're working with a single active router connected to four other routers through serial interfaces. You need to gather information about the serial connections between the routers. In this lab, your task is to answer the following questions using the CLI: What is the bandwidth of s0/0/0? Which interface is shut down? Which interface has a Layer 1 problem? Which interface is a DCE interface? Which interface is not assigned an IP address?

In the top right corner, select Answer Questions. Select Router to open the CLI. Press Enter to get started. At the prompt, type enable and press Enter to go to privileged mode. Type show interface and press Enter. Answer Questions 1-2. Type show ip interface brief and press Enter. Answer Question3. Type show controllers and press Enter to configure the enable password. Answer Question 4. Type show interface and press Enter. What is the bandwidth of s0/0/0? 1544000 Which interface is shut down? Serial0/0/1 Which interface has a Layer 1 problem? Serial0/1/1 Which interface is a DCE interface? Serial0/1/0 Which interface is not assigned an IP address? Serial0/1/0

You're configuring the switch ports on the Branch1 switch. You want to add an older server to switch port Fa0/6, which uses 10BaseT Ethernet. You also want to add a hub to switch port Fa0/7, which will be used in a lab for developers. The devices currently attached to the switch are shown in the diagram. In this lab, your task is to: Configure the switch port Fa0/6 to use 10 Mbps. Use the speed command to manually set the port speed. Configure the switch port Fa0/7 to use half-duplex communications. Use the duplex command to set the duplex. Make sure that ports Fa0/6 and Fa0/7 are enabled and can be used even though you haven't connected devices to those ports yet. Disable the unused interfaces. Use the shutdown command to disable the interfaces. You can also use the interface range command to enter configuration mode for multiple ports at a time.Fa0/4 and Fa0/5Fa0/8 through Fa0/23Gi0/1 and Gi0/2 Verify that all the remaining ports in use are enabled and configured to automatically detect speed and duplex settings. Use the show interface status command to check the configuration of the ports using a single list. Use this output to verify that all the other ports have the correct speed, duplex, and shutdown settings. If necessary, modify the configuration to correct any problems you find. The ports should have the following settings when you're finished:

Select Branch 1. Configure port Fa0/6 to use 10Mbps. Press Enter to get started. At the Branch1> prompt, type enable and press Enter. At the Branch1# prompt, type configure terminal and press Enter. At the Branch1(config)# prompt, type interface FastEthernet0/6 and press Enter. At the Branch1(config-if)# prompt, type speed 10 and press Enter. Configure port Fa0/7 to half duplex. At the Branch1(config)# prompt, type interface FastEthernet0/7 and press Enter to go to privileged mode. At the Branch1(config-if)# prompt, type duplex half and press Enter. Shut down all unused interfaces (Fa0/4, 0/5, 0/8-0/23, and Gi0/1-0/2). At the Branch1(config-if)# prompt, type interface range FastEthernet 0/4 - 5 , FastEthernet 0/8 - 23 , GigabitEthernet 0/1 - 2 and press Enter. At the Branch1(config-if-range)# prompt, type shutdown and press Enter. Press Ctrl + Z. Verify that all the remaining ports that are in use are enabled and configured to automatically detect speed and duplex settings. At the Branch1# prompt, type show interface status and press Enter. Verify the port configuration of all ports, and then use the necessary commands to correct any problems you find. For example, notice that Fa0/24 is administratively down, Fa0/2 is not configured to use auto speed, and Fa/03 is not configured to use auto duplex. At the Branch1# prompt, type configure terminal and press Enter. At the Branch1(config)# prompt, type interface FastEthernet0/24 and press Enter. At the Branch1# prompt, type no shutdown and press Enter. At the Branch1# prompt, type interface FastEthernet0/2 and press Enter. At the Branch1# prompt, type speed auto and press Enter. At the Branch1# prompt, type interface FastEthernet0/3 and press Enter. At the Branch1# prompt, type duplex auto and press Enter. Press Ctrl + Z. At the prompt, type show interface status and press Enter to verify your configuration changes. Save your changes to the startup-config file. At the Branch1# prompt, type copy run start and press Enter. Press Enter to begin building the configuration.

You are in the process of configuring the Branch1 switch. Use the show cdp neighbors detail command to find the IP address assigned to the FastEthernet0/0 interface on router SFO. In this lab, your task is to: Configure the switch with the following parameters:IP address: 192.168.11.250Subnet mask: 255.255.255.0 Configure the switch to use the FastEthernet0/0 interface on the SFO router as the default gateway. Save your changes to the startup-config file.

Select Branch1. Press Enter to get started. At the Branch1 > prompt, type enable and press Enter. At the Branch1# prompt, type show cdp neighbors detail and press Enter. Find the IP address for the SFO router. At the Branch1# prompt, type config t and press Enter. At the Branch1(config)# prompt, type interface vlan1 and press Enter. At the Branch1(config-if)# prompt, type ip address 192.168.11.250 255.255.255.0 and press Enter. At the Branch1(config-if)# prompt, type exit and press Enter. At the Branch1(config)# prompt, type ip default-gateway 192.168.11.254 and press Enter. At the Branch1(config)# prompt, type exit and press Enter. At the Branch1# prompt, type copy run start and press Enter. Press Enter to begin building the configuration.

In this lab, you will explore the switch port status. Devices are connected to the Branch1 switch as shown in the diagram. No other devices are connected to the switch. During your exploration, look for a line similar to the following: FastEthernet 0/1 is up, line protocol is up (connected) In this lab, your task is to complete the following: Select Branch1. Press Enter to get started. At the Branch1> prompt, type enable and press Enter. At the Branch1# prompt, type show ip interface brief and press Enter. Answer Questions 1-3. At the Branch1# prompt, type config t and press Enter. At the Branch1(config)# prompt, type interface FastEthernet0/2 and press Enter. At the Branch1# prompt, type shutdown and press Enter. Press Ctrl + Z. At the Branch1# prompt, type show ip interface brief and press Enter. Answer Question 4. Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type show interface and press Enter. Answer Questions 5-6. At the SFO# prompt, type config t and press Enter. At the SFO(config)# prompt, type interface FastEthernet0/0 and press Enter. At the SFO# prompt, type shutdown and press Enter. At the Branch1# prompt, type show ip interface brief and press Enter. Answer Question 7.

Select Branch1. Press Enter to get started. At the Branch1> prompt, type enable and press Enter. At the Branch1# prompt, type show ip interface brief and press Enter. Answer Questions 1-3. At the Branch1# prompt, type config t and press Enter. At the Branch1(config)# prompt, type interface FastEthernet0/2 and press Enter. At the Branch1# prompt, type shutdown and press Enter. Press Ctrl + Z. At the Branch1# prompt, type show ip interface brief and press Enter. Answer Question 4. Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type show interface and press Enter. Answer Questions 5-6. At the SFO# prompt, type config t and press Enter. At the SFO(config)# prompt, type interface FastEthernet0/0 and press Enter. At the SFO# prompt, type shutdown and press Enter. At the Branch1# prompt, type show ip interface brief and press Enter. Answer Question 7.

The Memphis router has CDP enabled on it. You need to find out the CDP information on which devices are connected to the interfaces on the router. In this lab, your task is to answer the following questions: Which device is connected to the Memphis FastEthernet0/1 interface? Which device is connected to the Memphis Serial0/0/1 interface? What is the IP address of the device connected to the Memphis Serial0/0/0 interface? What is the IP address of the device connected to the Memphis FastEthernet0/0 interface? Which remote port connects Branch3 to the Memphis router? Which remote port connects Miami to the Memphis router? Which platform is running on the device connected to the S0/0/1 interface?

Select Router. Press Enter to get started. At the Memphis> prompt, type enable and press Enter. At the Memphis# proenmpt, type show cdp neighbors and press Enter. At the Memphis# prompt, type show cdp neighbors detail and press Enter. In the top right corner, select Answer Questions. Answer the questions. Which device is connected to the Memphis FastEthernet0/1 interface? Branch3 Which device is connected to the Memphis Serial0/0/1 interface? Miami What is the IP address of the device connected to the Memphis Serial0/0/0 interface? 172.16.224.2 What is the IP address of the device connected to the Memphis FastEthernet0/0 interface? 192.168.30.130 Which remote port connects Branch3 to the Memphis router? GigabitEthernet0/1 Which remote port connects Miami to the Memphis router? Serial0/0/0 Which platform is running on the device connected to the S0/0/1 interface? 1841

After returning from vacation, you notice that someone has modified the configuration of the SFO router. Use the show running-config command to view the current configuration. In this lab, your task is to configure the following CDP settings on the SFO router: Configure the router to use CDP to discover neighbor Cisco devices on FastEthernet0/0 and Serial0/1/0, but not on Serial0/1/1. Reset the CDP holdtime and timer values to their default values. Enable CDP for the FastEthernet0/0 interface. Enable CDP for the Serial0/1/0 interface. Disable CDP for the Serial0/1/1 interface. Use the show cdp neighbor command to check your work and verify that everything works correctly. Save your changes to the startup-config file.

Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type configure terminal and press Enter. At the SFO(config)# prompt, type cdp run and press Enter. Reset the CDP holdtime and timer values to their default values. At the SFO(config)# prompt, type cdp timer 60 and press Enter. At the SFO(config)# prompt, type cdp holdtime 180 and press Enter. Enable CDP for the FastEthernet0/0 interface. At the SFO(config)# prompt, type int fa0/0 and press Enter. At the SFO(config-if)# prompt, type cdp enable and press Enter. Enable CDP for the Serial0/1/0 interface. At the SFO(config-if)# prompt, type int s0/1/0 and press Enter. At the SFO(config-if)# prompt, type cdp enable and press Enter. Disable CDP for the Serial0/1/1 interface. At the SFO(config-if)# prompt, type int s0/1/1 and press Enter. At the SFO(config-if)# prompt, type no cdp enable and press Enter. Press Ctrl + Z. At the SFO(config-if)# prompt, type show cdp neighbor and press Enter to check your work. Notice that int s0/1/1 is no longer a neighbor because you removed it. Save your changes to the startup-config file At the SFO# prompt, type copy running-config startup-config and press Enter. Press Enter to begin building the configuration.

You are learning how to turn CDP on and off for specific interfaces and for a device. By default, CDP is enabled on Cisco devices, and CDP advertisements are sent out each enabled interface. In this lab, your task is to complete the following on the SFO switch: View CDP information learned from neighboring devices. Disable CDP on the Serial 0/1/0 interface and view the results. Disable CDP on a router to prevent the router from exchanging CDP packets and view the results. Find the new location of the no cdp run entry. Enable CDP on the Serial 0/1/0 interface and view the results. Answer the Questions. Complete this lab as follows: Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. View the CDP information learned from neighboring devices.At the SFO# prompt, type show cdp neighbor and press Enter.Answer Question 1. Disable CDP on the Serial 0/1/0 interface and view the results.At the SFO# prompt, type configure terminal and press Enter.At the SFO(config)# prompt, type interface Serial 0/1/0 and press Enter.At the SFO(config-if)# prompt, type no cdp enable and press Enter.Press Ctrl + Z.At the SFO# prompt, type show cdp neighbor and press Enter.Answer question 2. Disable CDP on a router to prevent the router from exchanging CDP packets and view the results.At the SFO# prompt, type configure terminal and press Enter.At the SFO(config)# prompt, type no cdp run and press Enter.Press Ctrl + Z.At the SFO# prompt, type show cdp neighbor and press Enter.Answer question 3. Find the new location of the no cdp run entry.At the SFO# prompt, type show run and press Enter.Find the no cdp run entry.Answer question 4. Enale CDP on the Serial 0/1/0 interface and view the results.At the SFO# prompt, type configure terminal and press Enter.At the SFO(config)# prompt, type interface Serial 0/1/0 and press Enter.At the SFO(config-if)# prompt, type cdp enable and press Enter to enable CDP on the Serial 0/1/0 interface.At the SFO(config-if)# prompt, type exit and press Enter.At the SFO(config-if)# prompt, type cdp run and press Enter to enable CDP on the router.Press Ctrl + Z.At the SFO# prompt, type show cdp neighbors detail and press Enter to view the CDP information learned from neighboring devices.Answer question 5.

Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. View the CDP information learned from neighboring devices. At the SFO# prompt, type show cdp neighbor and press Enter. Answer Question 1. Disable CDP on the Serial 0/1/0 interface and view the results. At the SFO# prompt, type configure terminal and press Enter. At the SFO(config)# prompt, type interface Serial 0/1/0 and press Enter. At the SFO(config-if)# prompt, type no cdp enable and press Enter. Press Ctrl + Z. At the SFO# prompt, type show cdp neighbor and press Enter. Answer Question 2. Disable CDP on a router to prevent the router from exchanging CDP packets and view the results. At the SFO# prompt, type configure terminal and press Enter. At the SFO(config)# prompt, type no cdp run and press Enter. Press Ctrl + Z. At the SFO# prompt, type show cdp neighbor and press Enter. Answer Question 3. Find the new location of the no cdp run entry. At the SFO# prompt, type show run and press Enter. Find the no cdp run entry. Answer Question 4. Enale CDP on the Serial 0/1/0 interface and view the results. At the SFO# prompt, type configure terminal and press Enter. At the SFO(config)# prompt, type interface Serial 0/1/0 and press Enter. At the SFO(config-if)# prompt, type cdp enable and press Enter to enable CDP on the Serial 0/1/0 interface. At the SFO(config-if)# prompt, type exit and press Enter. At the SFO(config-if)# prompt, type cdp run and press Enter to enable CDP on the router. Press Ctrl + Z. At the SFO# prompt, type show cdp neighbors detail and press Enter to view the CDP information learned from neighboring devices. Answer Question 5. Which device is connected to the SFO Serial 0/1/0 interface? LAX Which device is connected to the SFO Serial 0/1/0 interface? None Which neighboring devices are shown? None Where can you find the no cdp run entry? In the interface subsections Which additional details does the show cdp neighbors detail command show compared to the show cdp neighbor command? Network address, enabled protocols, and software version

You have two routers connected in a back-to-back configuration as shown in the diagram. The current configuration has one or more problems. The routers should have the following configuration: Addresses on the 10.0.0.68/30 network are used for the serial connection. The clock rate should be set to 56000. In this lab, your task is to: Use the following commands to diagnose the problem:show ip interfaceshow interfacesshow controllers Correct any issues you find. When you're finished, the status of each interface should be up, and you should be able to ping each router from the other router interface.

Troubleshoot SFO. Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type show ip interface brief and press Enter to verify the configuration of the Serial0/1/0 interface. The status indicates a Layer 1 problem with the serial link. A Layer 1 problem can be caused by: A disconnected cable. A missing clock rate. The device on the other end turning off or shutting down. At the SFO# prompt, type show controllers s0/1/0 and press Enter to see which interface is the DCE interface. The output (DTE V.35) indicates that Serial0/1/0 is the DTE interface. Because the configuration on the SFO router appears to be correct, continue troubleshooting on the LAX router. Troubleshoot LAX. Select LAX. Press Enter to get started. At the LAX> prompt, type enable and press Enter. At the LAX# prompt, type show ip interface brief and press Enter. The status for Serial0/1/1 is administratively down. Take the necessary actions to correct the problem on the LAX router. At the LAX# prompt, type show interfaces s0/1/1 and press Enter to verify the configuration. Notice that the status is down. Verify that the encapsulation type is set correctly. At the LAX# prompt, type show controllers s0/1/1 and press Enter. The line DCE V.35, clock rate 0 indicates that the device is the DCE device, but the clock rate has not been set. At the LAX# prompt, type conf t and press Enter. At the LAX(config)# prompt, type int s0/1/1 and press Enter. At the LAX(config-if)# prompt, type clock rate 56000 and press Enter to configure the clock rate on the Serial0/1/1 interface. At the LAX(config-if)# prompt, type no shutdown and press Enter to bring the router up. Press Ctrl + Z. At the LAX# prompt, type show interfaces s0/1/1 and press Enter to verify the configuration. At the LAX# prompt, type ping 10.0.0.69 and press Enter to make sure that the two devices can communicate.

In this lab, you'll explore how various actions affect the status of the serial interface. The SFO router is connected to the LAX router using the serial interfaces indicated in the network diagram. The serial interfaces have not been configured. In this lab, your task is to: Use the show interfaces command on both routers and answer Question 1. Remove the shutdown from both interfaces and answer Question 2. Use the show controllers s0/1/0 command on SFO and answer Question 3. Set the clock rate to 9600 on SFO and answer Question 4. View the running-config on SFO and answer Question 5. Set the clock rate to 9600 on LAX. Use the show interfaces command on both router and answer Questions 6-7. Use the show ip interface command on both router and answer Question 8. Change the encapsulation to PPP on SFO and answer Question 9. Change the encapsulation back to HDLC on SFO. REFERENCES

Use the show interfaces command on both routers. Select SFO. Press Enter to get started. At the SFO> prompt, type enable and press Enter. At the SFO# prompt, type show interfaces and press Enter to verify the configuration of the Serial0/1/0 interface. Select LAX. Press Enter to get started. At the LAX> prompt, type enable and press Enter. At the LAX# prompt, type show interfaces and press Enter to verify the configuration of the Serial0/1/1 interface. Answer Question 1. Remove the shutdown from both interfaces. At the SFO# prompt, type conf t and press Enter. At the SFO(config)# prompt, type int s0/1/0 and press Enter. At the SFO(config-if)# prompt, type no shutdown and press Enter to bring the router up. Press Ctrl + Z. At the SFO# prompt, type show interfaces and press Enter. At the LAX# prompt, type conf t and press Enter. At the LAX(config)# prompt, type int s0/1/1 and press Enter. At the LAX(config-if)# prompt, type no shutdown and press Enter to bring the router up. Press Ctrl + Z. At the LAX# prompt, type show interfaces and press Enter. Answer Question 2. Use the show controllers s0/1/0 command on SFO. At the SFO# prompt, type show controllers s0/1/0 and press Enter. Answer Question 3. Set the clock rate on SFO. At the SFO# prompt, type conf t and press Enter. At the SFO(config)# prompt, type int s0/1/0 and press Enter. At the SFO(config-if)# prompt, type clock rate 9600 and press Enter to configure the clock rate on the Serial0/1/0 interface. Press Ctrl + Z. At the SFO# prompt, type show interfaces and press Enter. Answer Question 4. View the running-config on SFO. At the SFO# prompt, type show running-config and press Enter. Answer Question 5. Set the clock rate on LAX. At the LAX# prompt, type conf t and press Enter. At the LAX(config)# prompt, type int s0/1/1 and press Enter. At the LAX(config-if)# prompt, type clock rate 9600 and press Enter to configure the clock rate on the Serial0/1/0 interface. Use the show interfaces command on both router. Press Ctrl + Z. At the LAX# prompt, type show interfaces and press Enter. At the SFO# prompt, type show interfaces and press Enter. Answer Questions 6-7. Use the show ip interface command on both router. At the SFO# prompt, type show ip interface and press Enter. At the LAX# prompt, type show ip interface and press Enter. Answer Question 8. Change the encapsulation to PPP on SFO. At the SFO# prompt, type conf t and press Enter. At the SFO(config)# prompt, type int s0/1/0 and press Enter. At the SFO(config-if)# prompt, type encapsulation ppp and press Enter. Press Ctrl + Z. At the SFO# prompt, type show interfaces and press Enter. Answer Question 9. At the SFO# prompt, type conf t and press Enter. At the SFO(config)# prompt, type int s0/1/0 and press Enter. At the SFO(config-if)# prompt, type encapsulation hdlc and press Enter.