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CCNP ENARSI lab 6 of 35

OSPF area types, summarisation and filtering

Turn one area into a totally stubby area and another into a totally NSSA, summarise inter-area and external routes, and filter a guest network at the ABR, measuring the effect on every router's database.

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In your workspace: Shared, then CCNP ENARSI 300-410 guided labs, then 06 - OSPF area types summarisation and filtering

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Level
Intermediate
Time
About 75 minutes
Nodes need
5 vCPU, 2,560 MB
Smallest plan
Lite

The scenario

Larkspur Retail runs a three-area OSPFv2 network. Area 0 joins head office (R1, R2) and the cloud gateway R5, which redistributes three cloud prefixes. Area 10 is a group of stores behind R2; area 20 is the distribution centre behind R1, whose router R4 also redistributes a supplier network. Today every area is a normal area, so the small store router R3 carries every external and inter-area route in the company.

The new design: area 10 becomes totally stubby, area 20 becomes a totally NSSA (it must keep its supplier route), store and distribution-centre LANs are summarised at the ABRs, the cloud prefixes are summarised at R5, and the distribution centre's guest network must never leave area 20.

DeviceInterfaceAddressArea
R1Gi0/0 / Gi0/1 / Gi0/210.0.12.1 / 10.0.14.1 / 10.0.15.1 /240 / 20 / 0
R2Gi0/0 / Gi0/110.0.12.2 / 10.0.23.2 /240 / 10
R3Gi0/0, Lo10–Lo1310.0.23.3/24, 10.10.0.1–10.10.3.1 /2410
R4Gi0/0, Lo20–Lo2210.0.14.4/24, 10.20.0.1–10.20.2.1 /2420
R4Lo9910.20.99.1/24 (guest)20
R4Lo50192.168.50.1/24 (supplier, redistributed)–
R5Gi0/010.0.15.5/240
R5Lo1–Lo3172.20.1.1–172.20.3.1 /24 (cloud, redistributed)–
R*n*Lo010.255.0.n/32router's area

All links use the point-to-point network type. R1 is the ABR for area 20, R2 the ABR for area 10; R4 and R5 are ASBRs.

What you’ll practise

  • Configure stub and totally stubby areas and explain which LSA types they block
  • Configure an NSSA and a totally NSSA, and follow a type 7 LSA through its translation to type 5
  • Summarise inter-area routes with area range and external routes with summary-address
  • Filter type 3 LSAs at an ABR with a filter list, and contrast it with a distribute list

The tasks

  1. Measure the starting point
  2. Make area 10 totally stubby
  3. Make area 20 a totally NSSA
  4. Summarise the store and distribution-centre LANs
  5. Summarise the external cloud routes
  6. Keep the guest network inside area 20
  7. Compare and test

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 area types summarisation and filtering5 nodes, 4 links. Every link is listed as text below the diagram.R1R2R3R4R5Gi0/1Gi0/0Gi0/0Gi0/0Gi0/2Gi0/0Gi0/1Gi0/0
5 nodes, with the interface names each link uses. On a narrow screen, scroll the diagram sideways.
Every link, as text
  • R1 Gi0/0 to R2 Gi0/0
  • R2 Gi0/1 to R3 Gi0/0
  • R1 Gi0/1 to R4 Gi0/0
  • R1 Gi0/2 to R5 Gi0/0
Nodes in OSPF area types, summarisation and filtering, 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

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 ENARSI 300-410 guided labs.

  3. Open 06 - OSPF area types summarisation and filtering 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.