CloudLabBox
Try the free demo

CCNP ENARSI lab 5 of 35

OSPF network types, router types and the link-state database

Build a three-area OSPFv2 network that uses broadcast, point-to-point and non-broadcast links, control the DR election, add an ASBR, and then read every LSA type in the database to see how OSPF describes the network.

Run this lab

It needs Lite: its 5 nodes are set to 5 vCPU and 2,560 MB in total. That fits the free demo too.

In your workspace: Shared, then CCNP ENARSI 300-410 guided labs, then 05 - OSPF network types router types and the link-state database

Try it free for 30 minutesRun it on Lite from £3 a day

The free demo needs no card and no email. Every lab plan includes every guided lab.

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

The scenario

Kestrel Engineering is replacing its old routing with OSPFv2. Three core routers (R1, R2, R3) share one Ethernet segment, the core LAN, which is area 0. R3 connects the design office (R4) in area 1 over a dedicated point-to-point circuit. R2 connects the factory (R5) in area 2 over a provider service that, like old Frame Relay, doesn't carry multicast, so OSPF must be told its neighbours by hand. R5 also connects a partner extranet that must be advertised into OSPF as an external route.

Build it, put the right network type on each link, control which router becomes DR on the core LAN, and then use the link-state database to explain exactly how OSPF describes this network.

DeviceInterfaceAddressAreaNotes
R1 / R2 / R3Gi0/010.0.123.1 / .2 / .3 /240core LAN (one shared segment)
R3Gi0/110.0.34.3/241to R4 Gi0/0
R4Gi0/010.0.34.4/241to R3
R4Lo110.4.4.1/241office LAN
R2Gi0/110.0.25.2/242to R5 Gi0/0, no multicast
R5Gi0/010.0.25.5/242to R2
R5Lo110.5.5.1/242factory LAN
R5Lo99172.31.99.1/24–partner extranet (external)
R*n*Lo010.255.0.n/32as the router's arearouter ID n.n.n.n

What you’ll practise

  • Enable OSPFv2 per interface in three areas with fixed router IDs
  • Control the DR/BDR election with priorities and explain why it is non-preemptive
  • Configure point-to-point and non-broadcast network types and compare their timers and behaviour
  • Make a router an ASBR and identify internal, backbone, ABR and ASBR roles
  • Read LSA types 1, 2, 3, 4 and 5 and explain who originates each and how far it floods

The tasks

  1. Bring up area 0 on the core LAN
  2. Control the DR election
  3. Area 1 over a point-to-point link
  4. Area 2 over a link without multicast
  5. Make R5 an ASBR
  6. Read the link-state database
  7. Test end to end

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 network types router types and the link-state database5 nodes and 1 network, 5 links. Every link is listed as text below the diagram.R1R2R3R4R5COREGi0/0Gi0/0Gi0/0Gi0/1Gi0/0Gi0/1Gi0/0
5 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)
  • R3 Gi0/1 to R4 Gi0/0
  • R2 Gi0/1 to R5 Gi0/0
Nodes in OSPF network types, router types and the link-state database, 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 05 - OSPF network types router types and the link-state database 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.

More CCNP ENARSI labs

All CCNP ENARSI labs

Related labs in other courses

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.