CloudLabBox
Try the free demo

CCNP ENCOR lab 12 of 36

EIGRP named mode compared with OSPF

Run EIGRP named mode and OSPF side by side on the same four routers, then compare how each one measures paths, finds backups, balances load and limits its own scope.

Run this lab

It needs Lite: its 4 nodes are set to 4 vCPU and 2,048 MB in total. That fits the free demo too.

In your workspace: Shared, then CCNP ENCOR 350-401 guided labs, then 12 - EIGRP named mode compared with OSPF

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 70 minutes
Nodes need
4 vCPU, 2,048 MB
Smallest plan
Lite

The scenario

Fernhill Freight is merging with a smaller haulier whose routers run EIGRP, while Fernhill runs OSPF. Before the architecture board decides which protocol survives, you've been asked to run both on a test bed that copies the new Bristol branch design: a 1 Gbit/s primary path through R2 and a 100 Mbit/s backup circuit through R3. Your notes go into the board paper, so measure everything.

DeviceInterfaceAddressConnects to
R1 (HQ)Gi0/010.0.12.1/30R2 Gi0/0 (1 Gbit/s)
R1Gi0/110.0.13.1/30R3 Gi0/0 (100 Mbit/s circuit)
R1Lo0 / Lo1010.255.0.1/32 / 10.10.30.1/24 (HQ servers)–
R2Gi0/0 / Gi0/110.0.12.2/30 / 10.0.24.1/30R1 / R4
R3Gi0/0 / Gi0/110.0.13.2/30 / 10.0.34.1/30R1 / R4
R4 (Bristol)Gi0/0 / Gi0/110.0.24.2/30 / 10.0.34.2/30R2 / R3
R4Lo0 / Lo1010.255.0.4/32 / 10.40.10.1/24 (branch LAN)–

Router IDs: R*n* uses n.n.n.n. All routers have their addresses; nothing is routed yet. The two Loopback10 interfaces stand in for LANs, so they already carry ip ospf network point-to-point: without it, OSPF would advertise them as /32 host routes.

Topology: a square. R1 — R2 — R4 on top (1 Gbit/s), R1 — R3 — R4 underneath, with R1–R3 a 100 Mbit/s circuit.

What you’ll practise

  • Configure EIGRP named mode with a fixed router ID and read the neighbour and topology tables
  • Explain feasible distance, reported distance and the feasibility condition, and find a feasible successor
  • Use variance for unequal-cost load balancing and explain why OSPF can't do the same
  • Limit EIGRP query scope with a stub router
  • Run OSPF on the same links, predict which protocol wins with administrative distance, and compare the two protocols' choices

The tasks

  1. Bring up EIGRP named mode
  2. Read the topology table
  3. Tell the routers about the slow circuit
  4. Use the backup path too
  5. Make Bristol a stub router
  6. Add OSPF on the same links
  7. Compare the two answers

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 EIGRP named mode compared with OSPF4 nodes, 4 links. Every link is listed as text below the diagram.R1R2R3R4Gi0/0Gi0/0Gi0/1Gi0/0Gi0/1Gi0/0Gi0/1Gi0/1
4 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
  • R1 Gi0/1 to R3 Gi0/0
  • R2 Gi0/1 to R4 Gi0/0
  • R3 Gi0/1 to R4 Gi0/1
Nodes in EIGRP named mode compared with OSPF, 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

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 12 - EIGRP named mode compared with OSPF 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 ENCOR labs

All CCNP ENCOR 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.