Adding and Monitoring Network Switches

Network switches are critical infrastructure components that deserve proper monitoring to ensure optimal network performance and quickly identify connectivity issues. Server Scout's devices plugin makes it straightforward to monitor your switches via SNMP, providing comprehensive visibility into port status, traffic patterns, and error rates.

Adding a Network Switch

To begin monitoring a switch, navigate to your Server Scout dashboard and access the Devices section.

1. Click Add Device and select Network Switch from the device type dropdown
2. Enter the switch's IP address or hostname in the connection field
3. Configure SNMP credentials:

- For SNMP v1/v2c: Enter the community string (typically "public" for read access) - For SNMP v3: Provide the username, authentication protocol, privacy protocol, and corresponding passwords

1. Select the appropriate poller server from your available Server Scout agents
2. Set the polling interval (recommended: 5-10 minutes for switches)
3. Add any relevant tags for organisation and filtering

Click Save to add the switch to your monitoring setup. Server Scout will immediately begin collecting data from the device.

Data Collection and Metrics

The devices plugin uses SNMP to gather comprehensive port-level information from your switches. Here's what Server Scout monitors:

Per-Port Metrics

Server Scout collects detailed statistics for each switch port:

• Port status: Operational state (up/down/administratively down)
• Link speed: Configured and actual speeds (10Mbps, 100Mbps, 1Gbps, 10Gbps, etc.)
• Traffic counters: RX/TX bytes and packets per second
• Error statistics: Input/output errors, discards, and collision counters
• Utilisation percentage: Calculated based on current throughput versus port capacity

Summary Statistics

At the device level, Server Scout provides:

• Total port count: All available ports on the switch
• Ports up/down counts: Quick health overview
• Aggregate throughput: Combined RX/TX across all active ports
• Error rate summaries: Total errors across the device
• Uptime: How long the switch has been operational

Viewing Switch Data

Once data collection begins, you can access comprehensive switch information through the device detail page.

Navigate to Devices → [Your Switch Name] to view:

• Overview dashboard with key metrics and status indicators
• Port table showing real-time status of all ports with sortable columns
• Historical graphs displaying traffic trends, error rates, and utilisation over time
• Port-specific drill-down views for detailed analysis of individual interfaces

The interface provides colour-coded status indicators making it easy to quickly identify problematic ports or unusual traffic patterns.

Setting Up Alerts

Proactive alerting helps you respond to network issues before they impact users. Server Scout offers several alert types for network switches:

Port Status Alerts

Configure notifications when ports change state:

1. Go to Alerts → Create Alert Rule
2. Select your switch device and choose Port Status Change
3. Specify which ports to monitor (all ports, tagged ports, or specific interfaces)
4. Set notification preferences (email, Slack, webhook, etc.)

Error Rate Monitoring

Set up alerts for increasing error rates:

1. Create a new alert rule for Interface Errors
2. Define thresholds (e.g., more than 100 errors per minute)
3. Choose the evaluation period (5-minute average recommended)
4. Configure escalation rules for persistent issues

Traffic Anomaly Detection

Monitor for unusual traffic patterns:

Alert Condition: Port utilisation > 80% for 10 minutes
OR
Traffic volume increases by 200% compared to baseline

Best Practices

• Regular credential auditing: Ensure SNMP community strings follow security best practices
• Baseline establishment: Monitor switches for several days to understand normal traffic patterns
• Strategic alerting: Avoid alert fatigue by focusing on critical ports and meaningful thresholds
• Documentation: Use Server Scout's tagging and notes features to document port purposes and expected behaviour

With Server Scout monitoring your network switches, you'll gain valuable insights into network performance whilst receiving timely notifications of potential issues, helping maintain robust network infrastructure.