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Configuring a subnet scan
A discovery source defines what to scan and how. This article covers creating one.
Before you start
- A site with a Site Collector assigned (the collector runs the scan on your local network).
- Any credentials the scan needs (for example an SNMP community string).
Adding a discovery source
- Select Discovery in the sidebar (Network Discovery), then Add Source.
- Complete the form:
| Field | Notes |
|---|---|
| Name | e.g. Main Office SNMP |
| Method | How to discover (see below) |
| Site | Which site this scan belongs to |
| Subnet (CIDR) | For subnet/ICMP methods, e.g. 192.168.1.0/24 |
| Device Host / IP | For controller/device methods, the address to query |
| Saved Credential | Choose a stored credential, or enter details inline |
| Scan Interval | How often to rescan (5 min – 24 hours) |
| Enabled | Leave checked to activate |
- Save.
Discovery methods
- SNMP Subnet Scan — sweep a subnet via SNMP.
- UniFi Controller — pull devices from a UniFi controller.
- Aruba CX Switch — query an Aruba CX switch.
- MikroTik Router — query a MikroTik router.
- ICMP Ping Only — find live hosts by ping, without polling them.
For API methods you can tick Queue device even if API unavailable to still record a basic entry when the host answers a ping.
Notes & tips
- Store the scan's login as a credential and pick it here, rather than typing it inline, so it's reusable and encrypted.
- Match the method to the equipment — vendor methods (UniFi/Aruba/MikroTik) return richer data than a plain SNMP sweep.