Domotz Network Operations

Overview

Domotz provides comprehensive network monitoring capabilities through its agents. This includes network device discovery, SNMP polling for hardware metrics, TCP port monitoring, speed tests for bandwidth measurement, and network topology mapping.

Key Concepts

Network Scanning

Domotz agents periodically scan local network subnets to discover devices. Scans can also be triggered on demand. Discovery uses:

• ARP scanning - Discovers devices on local subnets
• SNMP discovery - Identifies device capabilities and metadata
• DNS resolution - Resolves hostnames for discovered IPs
• MAC OUI lookup - Identifies device vendor from MAC address

SNMP Monitoring

Domotz polls SNMP-enabled devices for operational metrics:

• Interface statistics - Bandwidth utilization, errors, discards
• System resources - CPU, memory, disk usage
• Environmental - Temperature, fan status, power supply
• Custom OIDs - User-defined SNMP data points

Port Monitoring

TCP port monitoring checks whether specific services are reachable:

• Web servers (80, 443)
• Remote access (3389, 22)
• Database servers (1433, 3306, 5432)
• Custom application ports

Speed Tests

Agents can run bandwidth speed tests to measure:

• Download speed - Downstream bandwidth
• Upload speed - Upstream bandwidth
• Latency - Round-trip time

API Patterns

Trigger Network Scan

domotz_scan_network

Parameters:

• agent_id -- The agent to run the scan from (required)

List SNMP Data

domotz_list_snmp_data

Parameters:

• agent_id -- The agent ID (required)
• device_id -- The device to get SNMP data for (required)

Example response:

[
  {
    "oid": "1.3.6.1.2.1.2.2.1.10.1",
    "label": "ifInOctets (GigabitEthernet0/1)",
    "value": "1234567890",
    "type": "Counter32",
    "last_polled": "2026-03-27T15:00:00Z"
  }
]

List Open Ports

domotz_list_ports

Parameters:

• agent_id -- The agent ID (required)
• device_id -- The device to check ports for (required)

Example response:

[
  {
    "port": 443,
    "protocol": "tcp",
    "status": "open",
    "service": "https",
    "last_checked": "2026-03-27T15:00:00Z"
  }
]

Run Speed Test

domotz_run_speed_test

Parameters:

• agent_id -- The agent to run the speed test from (required)

Example response:

{
  "download_speed": 245.6,
  "upload_speed": 48.2,
  "latency": 12.4,
  "timestamp": "2026-03-27T15:05:00Z"
}

Common Workflows

Network Discovery Audit

1. Call domotz_scan_network to trigger a fresh scan
2. Wait for scan to complete
3. Call domotz_list_devices to see all discovered devices
4. Compare against known inventory for new/rogue devices

Bandwidth Monitoring

1. Call domotz_list_snmp_data for network devices
2. Look for ifInOctets and ifOutOctets counters
3. Calculate bandwidth utilization over time
4. Flag interfaces exceeding capacity thresholds

Service Availability Check

1. Call domotz_list_ports for a server device
2. Verify expected services are showing as open
3. Flag any expected ports that are closed
4. Cross-reference with Domotz Eyes checks for deeper monitoring

Site Bandwidth Assessment

1. Call domotz_run_speed_test from the site's agent
2. Compare results against the ISP's advertised speeds
3. Track trends over time to identify degradation
4. Flag sites with consistently low bandwidth

Error Handling

Scan Not Completing

Cause: Agent is busy, offline, or network is very large Solution: Check agent status; wait and retry; reduce scan scope

No SNMP Data

Cause: Device does not support SNMP, wrong community string, or SNMP not configured Solution: Verify SNMP is enabled on the device; check community string configuration

Port Check Failures

Cause: Firewall blocking the scan, device offline, or service not running Solution: Verify device is online; check firewall rules; verify service is running

Best Practices

• Schedule regular network scans to detect new devices
• Monitor SNMP metrics for all critical network infrastructure
• Set up port monitoring for business-critical services
• Run periodic speed tests to track ISP performance
• Compare discovered devices against documented inventory
• Use SNMP data to build capacity planning reports
• Configure alert profiles for SNMP threshold violations

Related Skills

• api-patterns - Pagination and rate limiting
• agents - Agents that perform network operations
• devices - Devices discovered by scans
• alerts - Alerts from network monitoring
• eyes - Advanced monitoring sensors