IntermediatePublished 2026-09-30
CCNA L3 Switching: DHCP Across the Gateway
Today's daily lab
Lab 3 of 3 in CCNA Layer 3 Switching: Route on the Switch · ← Previous
CCNA exam domain: IP Services
Hosts now get their addresses from a server two hops away. Make the switch relay the requests and keep the gateway range out of the pools.
Learning objectives
- Relay DHCP requests from each VLAN to a remote server
- Keep infrastructure addresses out of the lease pools
- Verify each host leases an address in its own VLAN
Troubleshooting focus
- No lease at all: the request never leaves the VLAN
- The server sees the request but no offer arrives: check the server's route back to the VLAN
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.
- 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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