cisco ccna exams

cisco ccna exams.On the 2600-1, configure PPPCHAP authentication (use password richard) o Click on the tab Lab Instructions, and select 2600-1 from the drop-down list Devices; you can also click on the tab NetMap, then double-click on the device icon 2600-lo to enter configuration mode: configure terminalo On router 2600-1 _h, set the username and password: username 2600-2 password richardo Enter the serial interface: interface serialO Set the authentication method to CHAP: ppp authentication chapo Disable the interface: shutdown; then re-enable the interface: no shutdowno exit configuration mode: end.8. Check the status of the interface serial0.Check the status of the interface: show interface serialOo The data link layer status should be down, and the LCP status should be ACKRCVDo Note that you do not actually need to disable and re-enable the interface, because after some time, the LCP will notice the authentication configuration and perform authentication.9. On Router 2600-2, configure PPPCHAP authentication (using password richard) oClick the tab Lab Instructions, and select 2600-2 from the drop-down list Devices; you can also click the tab NetMap, and then double-click the device icon 2600-2o to enter configuration mode: configure terminalo On router 2600.2, set the username and password: username 2600-1 password richardousername 2600-1 password richardo Enter the serial interface: interface serialOo Set the authentication method to CHAP: ppp authentication chapo Disable the interface: shutdown; then re-enable the interface: no shutdowno Exit configuration mode: end.10. View the status of the interface serial. Check the status of the interface: show interface serialO. The data link layer status should be up, while the LCP status should be OPEN, and there are two protocols in the OPEN state: IP and CDP.11. Check the connectivity to router 2600-1. ping router 2600-1: ping 192.168.2.1, which should be successful.Practical Exercise 24.2Basic PPP troubleshooting differs from Practical Exercise 24.1 in that this is a troubleshooting exercise. In live exercise 24.1, you configured PPPCHAP authentication between routers 2600-2 and 2600-1, whereas in this exercise, the network is configured, but there are three problems that you need to identify and fix to get the network working properly. These issues are all related to connectivity between routers 2600-2 and 2600.1. You will use the BosonNetSim simulator for this exercise; for a schematic of the network used by this simulator, see the Preface section of this book; the addressing scheme is the same as listed there. After starting this simulator, click the tab Labs in the lower left corner, then click the tab McGraw-Hill in the upper left corner (tab Standard and Custom to the right). o Next, double-click Exercise 24-2, which will load the router's PPP configuration. Let's start with the problem: The PPP data link layer between routers 2600-2 and 2600.1 is not active. Your task is to identify and fix these three problems. You should first try to troubleshoot the problem yourself; if you can't, go back and follow the steps and solutions provided here. 1. Check the status of the serial interface on the Router 2600-1. Click the Lab Instructions tab, and select 2600-1 from the drop-down list Devices; you can also click the NetMap tab, and then double-click the device icon 2600-1o view the status of interface serial0: show interfaces serialO, notice that the physical layer status of the interface is up, but the line protocol status This indicates that there is a problem with the data link layer. 2. Check the status of interface serial on router 2600-2. Click the Lab Instructions tab, and select 2600-2 from the drop-down list Devices; you can also click the NetMap tab, and then double-click the device icon 2600-2o to view the status of the interface: show interfaces serialO, and notice that the interface is disabled. Enable the interface: configure terminal, interface serialOno shutdown and end. wait a few seconds and check the status of the interface again: show interfaces serial. note that the status is up and down, which indicates a problem with the data link layer. Also, notice that the encapsulation is set to PPP. 3. Check the serial interface encapsulation of the router 2600-1 and the rest of the router's configuration. Click on the Lab Instructions tab and select 2600-1 from the drop-down list Devices; you can also click on the NetMap tab and double-click on the device icon 2600-1. Check the status of the interface: show interfaces serialO and notice that the status is up and down, which indicates a data link layer problem. Also, notice that the encapsulation is set to PPP, and since the encapsulation is PPP on both ends, the problem must be with authentication. Check the active configuration of router 2600.1: show running-configo On interface serial. the authentication method configured is CHAP, but the configured username is 2600-1 instead of 2600-2o fix the problem by doing the following: configure terminakno username 2600-1 password ciscousername 2600-2 password cisco and