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CCNP ENCOR lab 8 of 36

Multi-area OSPFv2: adjacencies, network types and passive interfaces

Join a three-router backbone to two regional areas with OSPFv2, control the DR election, use point-to-point links and passive interfaces, and read the link-state database the way the exam expects.

Run this lab

It needs Lite: its 6 nodes are set to 6 vCPU and 3,584 MB in total. That fits the free demo too.

In your workspace: Shared, then CCNP ENCOR 350-401 guided labs, then 08 - Multi-area OSPFv2 - adjacencies network types and passive interfaces

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Level
Intermediate
Time
About 70 minutes
Nodes need
6 vCPU, 3,584 MB
Smallest plan
Lite

The scenario

Fernhill Freight runs its Leeds head office core on three routers that share one Ethernet segment (CORE). Two regional offices hang off the core: Bristol through R1 and Glasgow through R3. Today every router has its addresses but there is no routing at all, so Bristol can't reach anything beyond R4.

The design team has chosen multi-area OSPFv2: the core is area 0, Bristol is area 1 and Glasgow is area 2. You'll build it the way a senior engineer would: fixed router IDs, a predictable designated router, point-to-point WAN links, no hellos towards users, and costs that make sense on gigabit links.

DeviceInterfaceAddressAreaConnects to
R1Lo010.255.0.1/320–
R1Gi0/010.0.0.1/240CORE
R1Gi0/110.0.14.1/301R4 Gi0/1
R2Lo0 / Lo1010.255.0.2/32 / 10.10.30.1/240– (Lo10 = HQ servers)
R2Gi0/010.0.0.2/240CORE
R3Lo010.255.0.3/320–
R3Gi0/010.0.0.3/240CORE
R3Gi0/110.0.35.1/302R5 Gi0/1
R4Lo010.255.0.4/321–
R4Gi0/110.0.14.2/301R1 Gi0/1
R4Gi0/210.20.10.1/241PC1 (Bristol LAN)
R5Lo0 / Lo1010.255.0.5/32 / 10.30.10.1/242– (Lo10 = Glasgow LAN)
R5Gi0/110.0.35.2/302R3 Gi0/1
PC1eth010.20.10.10/24, gateway 10.20.10.1–R4 Gi0/2

Router IDs: R*n* uses n.n.n.n (R1 = 1.1.1.1 … R5 = 5.5.5.5).

Topology: R1, R2 and R3 share the CORE segment · R1 Gi0/1 — R4 Gi0/1 · R3 Gi0/1 — R5 Gi0/1 · R4 Gi0/2 — PC1.

What you’ll practise

  • Enable OSPFv2 with both network statements and interface commands, with fixed router IDs
  • Control the DR/BDR election on a broadcast segment with interface priorities
  • Use the point-to-point network type on routed links and explain what changes
  • Stop hellos on user-facing interfaces with passive-interface, and advertise loopbacks with their real mask
  • Set a consistent reference bandwidth and read costs, LSA types and inter-area routes

The tasks

  1. Check the starting point
  2. Build area 0 with a predictable DR
  3. Add the regional areas over point-to-point links
  4. Keep hellos away from users
  5. Advertise the simulated LANs with their real mask
  6. Make the costs mean something
  7. Read the database and prove end-to-end reachability

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 Multi-area OSPFv2 - adjacencies network types and passive interfaces6 nodes and 1 network, 6 links. Every link is listed as text below the diagram.R1R2R3R4R5PC1COREGi0/2eth0Gi0/0Gi0/1Gi0/1Gi0/1Gi0/1Gi0/0Gi0/0
6 nodes and 1 network, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 Gi0/0 to CORE (network)
  • R2 Gi0/0 to CORE (network)
  • R3 Gi0/0 to CORE (network)
  • R1 Gi0/1 to R4 Gi0/1
  • R3 Gi0/1 to R5 Gi0/1
  • R4 Gi0/2 to PC1 eth0
Nodes in Multi-area OSPFv2: adjacencies, network types and passive interfaces, 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.m91 vCPU, 512 MB
R2Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 MB
R3Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 MB
R4Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 MB
R5Cisco IOSvvios-adventerprisek9-m.spa.159-3.m91 vCPU, 512 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 CCNP ENCOR 350-401 guided labs.

  3. Open 08 - Multi-area OSPFv2 - adjacencies network types and passive interfaces 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.