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HCIP-Datacom Core lab 1 of 14

OSPF in depth - LSAs and special areas

Read every OSPF LSA type on a running three-area network, then shrink the databases with a stub area, a totally stubby area and an NSSA, and watch each LSA disappear or change type.

Run this lab

It needs Standard: its 6 nodes are set to 6 vCPU and 10,240 MB in total.

In your workspace: Shared, then HCIP-Datacom Core H12-821 guided labs, then 01 - OSPF in depth - LSAs and special areas

Run it on Standard from £5 a day

The free demo can’t run it: it has 6 vCPU and 8 GB, and this lab’s nodes need 6 vCPU and 10,240 MB together. Every lab plan includes every guided lab.

Level
Intermediate
Time
About 70 minutes
Nodes need
6 vCPU, 10,240 MB
Smallest plan
Standard

The scenario

Northwind has outgrown its flat OSPF network. The team has split it into three areas: the Bristol depot (area 1), the core (area 0) and the Leeds warehouse (area 2), which also has a partner link. Depot routers are small, so they shouldn't carry routes they will never choose. You start with all three as normal areas, read what OSPF is really storing, and then cut each database down to what that area needs.

RouterLoopBack0 (router ID)GE0/0/0GE0/0/1Area of each interface
R11.1.1.110.0.12.1/24192.168.1.1/24 (PC1 .10)All in area 1
R2 (ABR)2.2.2.210.0.12.2/2410.0.23.2/24GE0/0/0 area 1, the rest area 0
R3 (ABR)3.3.3.310.0.23.3/2410.0.34.3/24GE0/0/1 area 2, the rest area 0
R4 (ASBR)4.4.4.410.0.34.4/24192.168.4.1/24 (PC2 .10)All in area 2, plus LoopBack9 203.0.113.1/24 (the partner network, imported)

What you’ll practise

  • Name the LSA types and say who creates each one and how far it floods
  • Read display ospf lsdb and tie each row to a router or a route
  • Configure stub and totally stubby areas and explain what each removes
  • Configure an NSSA and follow a Type 7 LSA through translation to Type 5
  • Prove reachability after each change with a real ping

The tasks

  • Task 0: Load the starting configuration
  • Concept: what each LSA is for
  • Task 1: Read a normal multi-area database
  • Concept: stub areas
  • Task 2: Make area 1 a stub area
  • Concept: totally stubby
  • Task 3: Make area 1 totally stubby
  • Concept: NSSA
  • Task 4: Turn area 2 into an NSSA

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 OSPF in depth - LSAs and special areas6 nodes, 5 links. Every link is listed as text below the diagram.R1R2R3R4PC1PC2GE0/0/1eth0GE0/0/1eth0GE0/0/0GE0/0/0GE0/0/1GE0/0/0GE0/0/1GE0/0/0
6 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 GE0/0/0
  • R3 GE0/0/1 to R4 GE0/0/0
  • R1 GE0/0/1 to PC1 eth0
  • R4 GE0/0/1 to PC2 eth0
Nodes in OSPF in depth - LSAs and special areas, 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
R4Huawei AR1000V routerhuaweiar1k-5.170-V300R022C00SPC100-Auto-update-esn1 vCPU, 2,048 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 HCIP-Datacom Core H12-821 guided labs.

  3. Open 01 - OSPF in depth - LSAs and special areas 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.