Goldfish Networks wordmark
IntermediatePublished 2026-08-15

CCNA Foundations: OSPFv3 — Adjacency Over Link-Local

Archive lab

Deploy single-area OSPFv3 between two routers so IPv6 LANs reach end-to-end. The IPv4 side is already forwarding with static routes. Your job: enable OSPFv3 with explicit router-ids and activate it per-interface on both the transit and LAN links, then verify the neighbor forms over link-local and routes are learned.

Track
Est. time
55 minutes
Difficulty
Intermediate
Topics

Learning objectives

  • Configure OSPFv3 with an explicit router-id so the process starts deterministically
  • Enable OSPFv3 on specific interfaces and place them in area 0
  • Observe OSPFv3 neighbors forming over IPv6 link-local addresses
  • Verify OSPFv3-learned routes and test end-to-end IPv6 connectivity

Troubleshooting focus

  • OSPFv3 remains Down or Init because the router-id was not set explicitly
  • Neighbors stuck in EXSTART/EXCHANGE due to mismatched MTU or area ID
  • No OSPFv3 routes because the LAN or transit interface was not enabled for OSPFv3
  • Host IPv6 default uses link-local; ensure the router’s LAN link-local is present and reachable
  • IPv6 interface is administratively down or missing an address

Topology

Subscribe to preview this lab's topology.

See plans

Related labs

More hands-on Cisco Modeling Labs practice on the same track and topics.

Grade your work

How this lab is graded
  • Build it your way. Where a lab lets you choose a value — a VLAN name, an interface description — grading checks that you configured it, not which name you picked. Names that another line has to reference, like an ACL applied with access-class, are stated in the guide and do have to match.
  • Addresses, modes and protocol keywords are exact. An IP address, a subnet mask, switchport mode trunk, an encapsulation — these carry the meaning of the lab, so they are graded as written in the guide.
  • Grading reads your saved configuration. Export the lab from CML after you have configured it, and make sure anything you set is in the running-config — a change that only exists in a terminal session never reaches the grader.
  • You can submit as many times as you like. Your best score stands, and each attempt tells you which checks passed so you can work the gaps.
  • Scored something you believe is correct? Use Report an issue on this page — that is exactly how the grading fixes in the changelog got found.

Create a free account to submit your lab for grading.

Create a free account
Found a problem with this lab?

Please sign in to report a problem — tying it to your attempts lets us reproduce and fix it faster.