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.
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