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Aruba CX lab 6 of 16

OSPF from one area to a multi-area campus

Route a three-switch campus with OSPFv2 on AOS-CX: point-to-point backbone links with authentication, passive user interfaces, a second area summarised at its ABR, a totally stubby area that only needs a default route, and a default route from the core.

Run this lab

It needs Standard: its 5 nodes are set to 8 vCPU and 10,240 MB in total.

In your workspace: Shared, then HPE Aruba Networking CX switching guided labs, then 06 - OSPF from one area to a multi-area campus

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 8 vCPU and 10,240 MB together. Every lab plan includes every guided lab.

Level
Intermediate
Time
About 75 minutes
Nodes need
8 vCPU, 10,240 MB
Smallest plan
Standard

The scenario

Northwind's campus has a core switch (core1) and two distribution blocks: dist1 for the office (area 1) and dist2 for a small depot (area 2) that only needs a way out, not the whole routing table. The addressing is done. Build OSPF to the design, so that the core's table stays small, the depot switch carries almost nothing, and nobody can inject routes on the backbone without the key.

DeviceRouter ID (loopback 0)Interfaces and areas
core110.255.0.11/1/1 10.0.1.1/30 area 0 · 1/1/2 10.0.2.1/30 area 2 · loopback 0 area 0 · loopback 1 203.0.113.1 (not in OSPF)
dist110.255.0.111/1/1 10.0.1.2/30 area 0 · loopback 0 area 0 · vlan 10 10.1.10.1/24 area 1 · loopback 1 10.1.11.1/24 area 1
dist210.255.0.121/1/1 10.0.2.2/30 area 2 · loopback 0 area 2 · vlan 20 10.2.20.1/24 area 2
h1 / h2–10.1.10.11/24 via .1 · 10.2.20.12/24 via .1

Backbone authentication: MD5, key ID 1, key NWospf1.

What you’ll practise

  • Enable OSPF per interface with ip ospf, using loopback router IDs
  • Use point-to-point network type on routed links and passive user interfaces
  • Build a multi-area design and identify ABRs and LSA types in the routing table
  • Summarise an area at its ABR with area range
  • Configure a totally stubby area and originate a default route
  • Authenticate OSPF on the backbone with MD5

The tasks

  1. Start OSPF in one area
  2. Point-to-point links and passive user interfaces
  3. Go multi-area
  4. Summarise area 1
  5. A totally stubby area and a default route
  6. Authenticate the backbone

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 from one area to a multi-area campus5 nodes, 4 links. Every link is listed as text below the diagram.core1dist1dist2h1h21/1/2eth01/1/2eth01/1/11/1/11/1/21/1/1
5 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • core1 1/1/1 to dist1 1/1/1
  • core1 1/1/2 to dist2 1/1/1
  • dist1 1/1/2 to h1 eth0
  • dist2 1/1/2 to h2 eth0
Nodes in OSPF from one area to a multi-area campus, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
core1Aruba AOS-CX virtual switcharubacx-10.142 vCPU, 3,072 MB
dist1Aruba AOS-CX virtual switcharubacx-10.142 vCPU, 3,072 MB
dist2Aruba AOS-CX virtual switcharubacx-10.142 vCPU, 3,072 MB
h1Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 MB
h2Alpine Linuxclbalpinebase-alpine-base-3-20-31 vCPU, 512 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 HPE Aruba Networking CX switching guided labs.

  3. Open 06 - OSPF from one area to a multi-area campus 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 Hewlett Packard Enterprise. The lab follows exam topics and isn’t vendor training material; vendor names identify the exams and the images in the workspace.