4.1.6_UsingCDPCommands_Handout

							Packet Tracer 4.0 Activity: Lab 4.1.6 Using CDP Commands




Objective
            Use CDP to obtain information about neighboring Cisco devices.
            Display information on how CDP is configured for its advertisement and discovery frame
             transmission.
            Disable CDP on an interface and globally on the router.

Scenario
        This topology represents a basic routed network with two locations.

Required Files
        To complete this lab, you will need the following files.
                 4.1.6_UsingCDPCommands.pka



Plan:
        Familiarize yourself with PT 4.0 help menu, in case you have questions. Open
        4.1.6_UsingCDPCommands.pka and follow the Instructions, which are repeated below:



Act:

Step 1 Display the values of the CDP timers, the interface status and encapsulation used.
        a. Enter show cdp interface at the GAD router cli prompt.
        b. How often is the router sending CDP packets? _______________________________________
        c.   What is the holdtime value? ______________________________________________________
        d. Global CDP settings can be seen using the show cdp by itself.
        e. What information is not displayed in the show cdp command that is displayed in the show cdp
           interface command?


1-2     Packet Tracer 4.0 Activity                                            Copyright  2006, Cisco Systems, Inc.
            _____________________________________________________________________________

Step 2 Display the CDP updates received on the local router.
       a. Enter show cdp neighbors at the GAD router cli prompt.
       b. Fill in the information in the following table.

Device ID           Local interface   Hold Time             Capability      Platform            Port ID




Step 3 Display details about updates received on the local router.
       a. Enter show cdp neighbors detail at the GAD router cli prompt.
       b. Fill in the information in the following table.

Information Gathered                                          Remote Device

Neighbor Device Name

Neighbor Device type

IP Address of Interface Attached to Your Router

Port ID of Your Router That the Neighbor IS On

Port ID of Neighbor Router That Your Router Is On

IOS Version of Neighbor Router



Step 4 Disable CDP on selected interfaces and globally on a router.

       a. For security reasons CDP should advertisements should not be sent out interfaces that do not
          connect to other Cisco devices. Prevent the sending of advertisements on the FastEthernet
          interfaces on both routers.

       b. From what mode is this command issued? __________________________________________

       c.   What is the command? __________________________________________________________

       d. Disable CDP globally on both routers.

       e. From what mode is this command issued? __________________________________________

       f.   What is the command? __________________________________________________________

       g. Verify your configuration by clicking the Check Results button.




2-2    Packet Tracer 4.0 Activity                                              Copyright  2006, Cisco Systems, Inc.