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CCNA lab 6 of 46

Validate network documentation with CDP and LLDP

Audit a site's cabling records against what the devices themselves report with CDP and LLDP, correct three documentation errors, label every link and switch discovery off where it leaks information.

Run this lab

It needs Lite: its 4 nodes are set to 4 vCPU and 4,096 MB in total. That fits the free demo too.

In your workspace: Shared, then CCNA 200-301 guided labs, then 06 - Validate network documentation with CDP and LLDP

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Level
Beginner
Time
About 40 minutes
Nodes need
4 vCPU, 4,096 MB
Smallest plan
Lite

The scenario

You've joined Kestrel Logistics as their first in-house network engineer. Before changing anything, your manager wants the site documentation checked. The records below were written by a contractor years ago, and nobody trusts them. Discovery protocols let the devices tell you what is really connected, so you'll use CDP and LLDP to audit every link, correct the records and label the interfaces properly.

The contractor's documentation (contains errors):

Local deviceLocal portRemote deviceRemote port
R1Gi0/1S1Gi0/0
R2Gi0/1S1Gi0/3
S1Gi0/1S2Gi0/1
S1Gi0/3S2Gi0/3
R1Gi0/0R2Gi0/0 (WAN, provider-managed)
DeviceModelSoftwareManagement address
R1IOSv15.910.6.0.1
R2Cisco 291115.410.6.0.6
S1IOSvL215.210.6.0.11
S2IOSvL215.210.6.0.12

What you’ll practise

  • Map a network from show cdp neighbors and show cdp neighbors detail
  • Enable LLDP and compare it with CDP
  • Find and correct cabling and inventory errors in documentation
  • Write accurate interface descriptions from discovery data
  • Disable discovery protocols on an untrusted interface and tune their timers

The tasks

  1. Map the network with CDP
  2. Get the details
  3. Correct the cabling records
  4. Label every link
  5. Turn on LLDP and compare
  6. Stop discovery where it leaks information
  7. Tune the timers on the switches

The Lab Tasks pane has the scenario, these tasks, the checks to run, hints and the full solution.

Topology and devices

The network as it opens in EVE-NG, drawn from the lab’s own canvas, and the image each node runs.

Topology of Validate network documentation with CDP and LLDP4 nodes, 5 links. Every link is listed as text below the diagram.R1R2S1S2Gi0/1Gi0/0Gi0/1Gi0/0Gi0/1Gi0/1Gi0/2Gi0/2Gi0/0Gi0/0
4 nodes, with the interface names each link uses.
Every link, as text
  • R1 Gi0/1 to S1 Gi0/0
  • R2 Gi0/1 to S2 Gi0/0
  • S1 Gi0/1 to S2 Gi0/1
  • S1 Gi0/2 to S2 Gi0/2
  • R1 Gi0/0 to R2 Gi0/0
Nodes in Validate network documentation with CDP and LLDP, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
R1Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 1,024 MB
R2Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 1,024 MB
S1Cisco IOSvL2viosl2-adventerprisek9-m.ssa.high_iron_202009291 vCPU, 1,024 MB
S2Cisco IOSvL2viosl2-adventerprisek9-m.ssa.high_iron_202009291 vCPU, 1,024 MB

How to open this lab

  1. Sign in to your workspace at lab.cloudlabbox.com.

  2. In File Manager, open Shared, then the folder CCNA 200-301 guided labs.

  3. Open 06 - Validate network documentation with CDP and LLDP and start its nodes, then open Lab Tasks for the scenario and the steps.

The lab is read-only. You can start the nodes and configure the devices, but changes to the topology can’t be saved. To change it, rebuild it in your own folder.

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CloudLabBox is independent of Cisco. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.