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CCNP Service Provider lab 3 of 23

OSPFv2 and OSPFv3 in a provider core

Tidy up an acquired OSPF network on IOS XR. Use a totally stubby area and an NSSA, summarise at the ABR, filter what enters an area, and repeat the layout in OSPFv3.

Run this lab

It needs Standard: its 4 nodes are set to 4 vCPU and 10,240 MB in total.

In your workspace: Shared, then CCNP Service Provider guided labs, then 03 - OSPFv2 and OSPFv3 in a provider core

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

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

The scenario

Fellgate Carrier has bought Tarnside Metro, a smaller network that runs OSPF, and its engineers will keep running it for a year or two. Your job is to tidy it up. R2 and R3 are the backbone, area 0. R1 is a metro aggregation router in area 1, with too little memory to carry the whole table, so it should see as little as possible. R4 connects a partner network, 198.51.100.0/24, in area 2. The partner's route has to reach the backbone, but the partner edge shouldn't see Tarnside's internal link addresses.

DeviceInterfaceAddressConnects to
R1Loopback010.255.0.1/32, 2001:db8:255::1/128
R1Loopback1110.1.1.1/24
R1Loopback1210.1.2.1/24
R1Gi0/0/0/010.0.12.1/30, 2001:db8:0:12::1/64R2 Gi0/0/0/0
R2Loopback010.255.0.2/32, 2001:db8:255::2/128
R2Gi0/0/0/010.0.12.2/30, 2001:db8:0:12::2/64R1 Gi0/0/0/0
R2Gi0/0/0/110.0.23.1/30, 2001:db8:0:23::1/64R3 Gi0/0/0/0
R3Loopback010.255.0.3/32, 2001:db8:255::3/128
R3Gi0/0/0/010.0.23.2/30, 2001:db8:0:23::2/64R2 Gi0/0/0/1
R3Gi0/0/0/110.0.34.1/30, 2001:db8:0:34::1/64R4 Gi0/0/0/0
R4Loopback010.255.0.4/32, 2001:db8:255::4/128
R4Loopback40198.51.100.1/24
R4Gi0/0/0/010.0.34.2/30, 2001:db8:0:34::2/64R3 Gi0/0/0/1

What you’ll practise

  • Configure OSPF areas and interfaces on IOS XR
  • Build stub, totally stubby and NSSA areas
  • Follow an external route through type 7 and type 5 LSAs
  • Summarise with range and filter with a route policy at an ABR
  • Run OSPFv3 with the same layout

The tasks

  1. Build area 0 and area 1 on IOS XR
  2. Make the partner edge an NSSA
  3. Summarise at the ABR
  4. Filter what enters area 2
  5. The same layout in OSPFv3
  6. Costs

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 OSPFv2 and OSPFv3 in a provider core4 nodes, 3 links. Every link is listed as text below the diagram.R1R2R3R4Gi0/0/0/0Gi0/0/0/0Gi0/0/0/1Gi0/0/0/0Gi0/0/0/1Gi0/0/0/0
4 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 Gi0/0/0/0 to R2 Gi0/0/0/0
  • R2 Gi0/0/0/1 to R3 Gi0/0/0/0
  • R3 Gi0/0/0/1 to R4 Gi0/0/0/0
Nodes in OSPFv2 and OSPFv3 in a provider core, with the image each runs and the vCPU and RAM it’s set to
NodeDeviceImage in Add NodeSet to
R1Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 MB
R2Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 MB
R3Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 MB
R4Cisco IOS XRvxrv-k9-demo-6.3.11 vCPU, 2,560 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 Service Provider guided labs.

  3. Open 03 - OSPFv2 and OSPFv3 in a provider core 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.