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HCIA-Datacom lab 3 of 22

Static and default routes with floating backups

Route between an HQ LAN and a branch LAN through a core router with static routes, send everything else to a default route, then add a floating static route over a backup link and prove it takes over when the primary link fails.

Run this lab

It needs Lite: its 4 nodes are set to 4 vCPU and 7,168 MB in total. That fits the free demo too.

In your workspace: Shared, then HCIA-Datacom H12-811 guided labs, then 03 - Static and default routes with floating backups

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Level
Beginner
Time
About 55 minutes
Nodes need
4 vCPU, 7,168 MB
Smallest plan
Lite

The scenario

Northwind's HQ router R1 reaches the branch router R3 through the core router R2. A cheaper backup link joins R1 and R3 directly. The ISP hands over at R2, whose LoopBack1 (203.0.113.0/24) stands in for the internet, and R3's LoopBack1 (192.168.30.0/24) is the branch LAN. There is no dynamic routing yet: you'll build the whole design with static routes, then make the backup link take over automatically if the primary path fails.

Link or LANNetworkAddresses
HQ LAN192.168.10.0/24R1 GE0/0/1 .1, PC1 .10
R1–R2 (primary)10.0.12.0/24R1 .1, R2 .2
R2–R3 (primary)10.0.23.0/24R2 .2, R3 .3
R1–R3 (backup)10.0.13.0/24R1 GE0/0/2 .1, R3 GE0/0/2 .3
Loopbacks10.0.1.1, 10.0.2.2, 10.0.3.3 /32R1, R2, R3

What you’ll practise

  • Read a VRP routing table: destination, protocol, preference, cost, flags and next hop
  • Configure static routes with a next hop, and a default route
  • Build a floating static route with preference and test failover
  • Configure equal-cost static routes for load sharing
  • Explain why every path needs a return route

The tasks

  • Task 0: Load the starting configuration
  • Task 1: What can each router reach?
  • Task 2: Static routes over the primary path
  • Concept: default routes
  • Task 3: Default routes to the internet
  • Concept: floating static routes
  • Task 4: A floating backup over the R1–R3 link
  • Task 5: Fail the primary link
  • Task 6: Equal-cost load sharing

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 with floating backups4 nodes, 4 links. Every link is listed as text below the diagram.R1R2R3PC1GE0/0/1eth0GE0/0/0GE0/0/0GE0/0/1GE0/0/1GE0/0/2GE0/0/2
4 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 GE0/0/0 to R2 GE0/0/0
  • R2 GE0/0/1 to R3 GE0/0/1
  • R1 GE0/0/2 to R3 GE0/0/2
  • R1 GE0/0/1 to PC1 eth0
Nodes in Static and default routes with floating backups, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
R1Huawei AR1000V routerhuaweiar1k-5.170-V300R022C00SPC100-Auto-update-esn1 vCPU, 2,048 MB
R2Huawei AR1000V routerhuaweiar1k-5.170-V300R022C00SPC100-Auto-update-esn1 vCPU, 2,048 MB
R3Huawei AR1000V routerhuaweiar1k-5.170-V300R022C00SPC100-Auto-update-esn1 vCPU, 2,048 MB
PC1VPCS 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 HCIA-Datacom H12-811 guided labs.

  3. Open 03 - Static and default routes with floating backups 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 Huawei. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.