DHCP server design, relay and failover
Design DHCP scopes and options, relay requests across VLANs, keep DHCP available, and stop rogue servers.
- Level
- Intermediate
- Length
- About 55 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Build a scope with the right pool, exclusions, reservations and options for a VLAN
- Configure and verify DHCP relay so clients in other subnets get leases
- Choose lease times and a failover design that fit how each network is used
- Identify a rogue DHCP server from client symptoms and explain how DHCP snooping blocks it
Course outline
- 1.DHCP server design, relay and failoverVideo · 2 min
- 2.Scopes, exclusions, reservations and optionsLesson · 15 min
- 3.Relays across VLANs: helper addresses and giaddrLesson · 15 min
- 4.Resilience and protection: lease times, failover and rogue serversLesson · 15 min
- 5.DHCP server design, relay and failover: knowledge checkKnowledge check · 17 questions
- 6.DHCP server design, relay and failover: practical exerciseKnowledge check · 1 question
- 7.The new guest VLAN hands out nothingScenario
- 8.Final exam6 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
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