AdvancedPublished 2026-10-17
CCNP Route Control: Filter Redistribution with a Prefix List
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Lab 3 of 5 in CCNP Route Control: Redistribution, Route Maps, PBR & IP SLA · ← Previous · Next →
The acquired site is leaking its vendor test bench into HQ. Let only its production subnets into OSPF.
Learning objectives
- Build a prefix list that names exactly the subnets to keep
- Attach it to redistribution through a route map
- Verify HQ learns production routes and nothing else
Troubleshooting focus
- Every EIGRP route vanished from HQ: a route map denies anything it does not match
- The bench subnet still shows at HQ: check the route map is on the redistribution
Topology
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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.
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