Map every port on every switch. Track usage, connected devices, VLAN assignments, and port state changes across your entire switching infrastructure.
The Switch Port Mapper (SPM) in Cloudmon provides port-level visibility into network switches using SNMP. It maps which ports are in use, which devices are connected to which ports, what VLANs are assigned, and records a full history of device connection and disconnection events. Navigate to Network → Switch Port Mapper to access the switches list, port details, and port history.
The main Switch Port Mapper page gives an overview of all added switches showing total, used, and available port counts, vendor and category distribution, top utilised switches, and status summaries across the fleet.
When adding a device under Network → Network Device, if the device supports SPM an Enable SPM option will appear. Enabling this adds it to the SPM module automatically. The following settings can be configured:
Configuration Details: scanning behaviour and organisation tags.
| Field | Description |
| Enable Scheduled Scanning | Enable to automatically scan switch ports at a defined interval. |
| Send Report | Enable to receive a report whenever a scan completes and records port changes. |
| Tags | Optional tags for filtering and grouping switches. |
Alert Settings: configure alarm rules, user groups, and third party services.
| Field | Description |
| Alarm Rule | An alarm rule to apply to this switch. Optional. |
| User Groups | The user groups that should be notified when an alarm is raised for this switch. |
| Third Party Services | Third-party integrations (such as Slack, Teams, or ITSM tools) to notify when an alarm is raised for this switch. User Groups and Third Party Services set here at the switch level are automatically inherited by the attached alarm rule. |
Click Save. Cloudmon will begin scanning the switch immediately.
Clicking into a switch opens its detail view. Device availability, scan history, downtime, and vendor information such as model, location, and contact details are displayed alongside every port on the switch, with each port showing its admin status, operational status, port speed, connected device, VLAN assignment, and last change timestamp.
This gives teams an immediate picture of which ports are in use, which are available, and which have recently changed state.
A full history of every device connection and disconnection event on each port is also recorded, including the MAC address of the connected device and the timestamp of the event. Port state changes are tracked as well, with filtering options by MAC address, port activity, and switch.
This is useful when investigating security incidents, tracing where a specific device has been connected, or auditing port usage over time.
Alarm triggers can be configured per switch to alert on port status changes, such as a port going up or down, and on device connections or disconnections on specific ports. To attach an alarm rule to a switch, open its Edit panel and select the desired profile from the Alarm Rule field under Alert Settings. The User Groups and Third Party Services assigned in the same section are inherited automatically by the attached alarm rule. Learn more.
| Symptom | Likely Cause | Fix |
| Switch not appearing after adding | The SNMP credential is incorrect or the probe cannot reach the switch | Verify the hostname or IP, confirm the SNMP credential is valid, and check that UDP port 161 is open between the probe and the switch |
| Ports showing no connected devices | A scan has not been run yet, or the switch has not reported port data | Trigger a manual scan from the switch detail view and wait for results to populate |
| Port History showing no events | Scheduled scanning was not enabled when the switch was added, so no change events have been recorded | Enable scheduled scanning in the switch's Configuration Details and allow at least one scan interval to pass for events to begin recording |