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Network+ lab 9 of 27

Static and default routes and route selection

Route a branch, head office and an internet provider by hand. You add network, default and host routes, prove that the longest prefix wins, and build a floating static route that takes over when the main link fails.

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It needs Lite: its 5 nodes are set to 5 vCPU and 3,584 MB in total. That fits the free demo too.

In your workspace: Shared, then CompTIA Network Plus N10-009 guided labs, then 09 - Static and default routes and route selection

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Level
Intermediate
Time
About 55 minutes
Nodes need
5 vCPU, 3,584 MB
Smallest plan
Lite

The scenario

A Harbour Logistics branch (R1) connects to head office (R2) over a primary WAN link. Both sites also connect to the internet provider R3, and the branch's provider link doubles as a backup path to head office. There's no routing protocol: everything is static, so it's your job to tell each router where every network is.

DeviceInterfaceAddressConnects to
R1Gi0/010.0.12.1/30R2 Gi0/0 (primary WAN)
R1Gi0/110.0.13.1/30R3 Gi0/0 (provider, backup)
R1Gi0/210.1.1.1/24branch LAN, PC1 10.1.1.10
R2Gi0/010.0.12.2/30R1
R2Gi0/110.0.23.2/30R3 Gi0/1
R2Gi0/210.2.2.1/24HQ LAN, PC2 (file server) 10.2.2.20
R3Gi0/0, Gi0/110.0.13.2/30, 10.0.23.1/30R1, R2
R3Loopback0203.0.113.1/32the internet

Policy: branch-to-HQ traffic uses the primary WAN, and fails over to the path through R3 if the primary goes down. Internet traffic goes straight to R3 from both sites. Security asked for file-server traffic from the branch to always go through the provider path, where they monitor it.

What you’ll practise

  • Read a routing table: codes, prefixes, administrative distance and metric
  • Configure static network routes and a default route in both directions
  • Use a host route to show that the longest matching prefix wins
  • Configure a floating static route with a higher administrative distance as a backup
  • Predict which route a router uses from prefix length, administrative distance and metric

The tasks

  1. Read the routing tables
  2. Add the primary network routes
  3. Add the default routes to the internet
  4. Send the file-server traffic another way (longest prefix match)
  5. Build a floating static backup
  6. Predict the route

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 Static and default routes and route selection5 nodes, 5 links. Every link is listed as text below the diagram.R1R2R3PC1PC2Gi0/2eth0Gi0/2eth0Gi0/1Gi0/0Gi0/1Gi0/1Gi0/0Gi0/0
5 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 Gi0/0 to R2 Gi0/0
  • R1 Gi0/1 to R3 Gi0/0
  • R2 Gi0/1 to R3 Gi0/1
  • R1 Gi0/2 to PC1 eth0
  • R2 Gi0/2 to PC2 eth0
Nodes in Static and default routes and route selection, 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, 512 MB
R2Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 512 MB
R3Cisco IOSvvios-adventerprisek9-m.SPA.159-3.M61 vCPU, 512 MB
PC1VPCS hostBuilt in to EVE-NGCounted as 1 vCPU, 1,024 MB
PC2VPCS hostBuilt in to EVE-NGCounted as 1 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 CompTIA Network Plus N10-009 guided labs.

  3. Open 09 - Static and default routes and route selection 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 CompTIA, Cisco and Netgate. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.