IntermediatePublished 2026-10-09

CCNP VRF & GRE: A Private Link Across the Provider

Archive lab

Two sites, and a provider that won't carry private routes. Build a tunnel between the sites and route each LAN through it.

Track

CCNP

Est. time

35 minutes

Difficulty

Intermediate

Topics

CCNP, GRE, Tunneling, Static Routing

Learning objectives

The tunnel stays down: check each end can reach the other's public address
The tunnel is up but hosts can't talk: check each site routes the far LAN into it

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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.

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