Restore DHCP across two routed VLANs
A hands-on N10-009 lab. You produce the real artefact and 9 automated checks verify it behaves the way the exam expects.
Try this labAll N10-009 practice
- Certification
- N10-009
- Format
- Structured configuration
- Difficulty
- medium
- Estimated time
- 30 min
- Automated checks
- 9
The brief
Edit dhcp-service-plan.json. The central DHCP server is 10.60.0.10 on 10.60.0.0/24; 10.60.0.1 is the only verified return router on that server LAN. Staff uses 10.60.16.0/24 with gateway 10.60.16.1, fixed devices 10.60.16.20 and 10.60.16.21, and 40 simultaneous DHCP clients. Voice uses 10.60.17.0/24 with gateway 10.60.17.1, fixed devices 10.60.17.10 and 10.60.17.11, and 24 simultaneous DHCP clients. The approved reachable DNS servers are 10.60.0.53 and 10.60.0.54. These facts are read-only. Set serviceEnabled to a boolean. Configure exactly one relay for each vlanId, staff and voice, with target set to the central server and giaddr set to that VLAN's client-facing gateway. Use exactly one scope for each VLAN's /24 network; scope ids may be any distinct nonempty strings. Each scope needs network, poolStart, poolEnd, exclusions, router and dnsServers. Give each scope an ordered contiguous pool of usable host addresses. Subtract excluded addresses inside the pool when counting client capacity. Protect every gateway and fixed device by excluding its address or keeping it outside the pool; exclusions elsewhere in the same subnet are harmless. Advertise the client's local gateway as router and one or both approved DNS servers. Add serverRoutes with destination and nextHop. For each relay gateway, the most specific matching route must use 10.60.0.1; an aggregate, individual VLAN routes or a suitable default may work. Other next hops are unavailable in this model, and duplicate route destinations are not supported. Keep the four top-level fields serviceEnabled, relays, scopes and serverRoutes. Enable the service, run the checks after each repair, inspect route selection and remaining lease capacity, and recover without Reset. This exercise models initial address acquisition, not renewal, failover or a live DHCP exchange.
What the checks verify
Your work is graded on 9 independent properties, not on matching one reference answer.
- The DHCP worksheet contains complete bounded records and canonical IPv4 values.
- Every required client VLAN has exactly one relay configuration.
- Relays identify their client VLAN and forward discovery to the central server.
- The central DHCP service accepts relayed requests.
- The most specific server return route reaches each client-facing relay address.
- Each client-facing giaddr selects exactly one scope for the correct VLAN subnet.
- Usable pools have enough unexcluded leases for simultaneous client demand.
- DHCP cannot lease gateways, fixed devices, network or broadcast addresses.
- Clients receive their local gateway and approved reachable DNS resolvers.
Where this sits in the N10-009 blueprint
- Domain
- Network Operations
- Objective
- IPv4 and IPv6 Services
- Skill
- Address, Name and Time Services
Part of N10-009 preparation
Labs are written by ExamNova to teach the decisions the exam tests. They are not reproductions of vendor lab content.