DHCP Management
Subnetly runs DHCP through your agents — ISC Kea on Linux, or the native DHCP Server role on Windows. You define scopes, reservations, and options in the console and assign each scope to an agent or a high-availability pair.
Open DHCP from Network Operations → DHCP in the left navigation. The page shows totals (scopes, reservations, overall pool utilization, enabled scopes) and a live indicator while agents report lease activity.
In this section
- Scopes — create a DHCP service for a subnet: CIDR, lease range, enable/disable, and deployment assignment.
- Reservations — pin a specific IP to a specific MAC, with optional hostname, client-id, and PXE boot settings.
- Options — the DHCP options sent to clients (gateway, DNS, domain, NTP, PXE, and more).
- Leases — view live leases reported by the agent and promote a lease to a reservation.
- HA groups — Kea failover pairs so DHCP keeps serving if one agent goes down.
How DHCP serving works
- You create a scope for a subnet and set its lease range and options.
- You assign the scope to a single agent, or to an HA group (a Kea failover pair).
- Subnetly renders the Kea (or Windows) configuration and pushes it to those agents.
- Agents report leases back, which you can view live and convert to reservations.
Quick tasks
| I want to… | Go to |
|---|---|
| Create a DHCP scope | Create a scope |
| Reserve an IP for a device | Add a reservation |
| Set the gateway/DNS handed to clients | Options |
| See who currently has a lease | Leases |
| Make DHCP highly available | HA groups |
| Find a device across all scopes | DHCP search |