LAB 13 ‐ Network component alert

🌐 Network Component Alerts in OCI

📌 What are Network Component Alerts?

Network Component Alerts are notifications triggered when network-related resources or metrics cross a defined threshold or face issues.

These alerts help you monitor the health, performance, and availability of your cloud network.

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🔹 Why are Network Alerts Important?

• Detect network failures quickly
• Prevent downtime of applications
• Monitor traffic and security issues
• Take immediate action (auto-scaling, troubleshooting)

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⚙️ Network Components You Can Monitor

1. 🌍 Virtual Cloud Network (VCN)

• Monitor overall network traffic and flow logs
• Detect unusual spikes or drops

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2. 🚪 Load Balancer

• Metrics:
  • Request count
  • Error rate (5xx errors)
  • Backend health

👉 Alert Example:

Trigger alert if error rate > 5%

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3. 🔗 VPN / FastConnect

• Monitor:
  • Tunnel status (UP/DOWN)
  • Data transfer

👉 Alert Example:

Notify if VPN tunnel goes DOWN

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4. 🖥️ Network Interfaces (VNIC)

• Monitor:
  • Incoming/outgoing traffic
  • Packet drops

👉 Alert Example:

Alert if packet drop rate increases

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5. 🔥 Security Lists / NSG (Indirect Monitoring)

• No direct metrics, but:
  • Use logs to detect blocked traffic
  • Identify misconfigurations

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🚨 How Alerts Work in OCI

1. Metrics collected by Monitoring Service
2. Alarm is created with a condition
3. When threshold is crossed → Alarm triggers
4. Message sent to a Topic
5. Notification delivered (Email/SMS)

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🔄 Example Scenario (Load Balancer Alert)

High Error Rate on Load Balancer
        ↓
Monitoring detects error rate > 5%
        ↓
Alarm is triggered
        ↓
Topic receives message
        ↓
Notification sent to Admin

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🌐 Network Component Alert Examples

Component	Metric	Alert Condition
Load Balancer	Error Rate	> 5%
VPN	Tunnel Status	DOWN
VNIC	Packet Drops	High
VCN	Traffic	Sudden spike

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🧠 Best Practices

• Set realistic thresholds (avoid false alerts)
• Use multiple alarms (warning + critical)
• Monitor both traffic and errors
• Integrate alerts with Notification Topics
• Regularly review logs and metrics

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✅ Short Definition

Network Component Alerts in OCI are notifications triggered when network resources like load balancers, VPNs, or traffic metrics exceed defined thresholds, helping maintain network performance and availability.

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Steps to create Network component alert

1.Navigate to burger menu and choose the option "Observability & Management" and select the option Rules under "Event Service"

2.Select the option create rule

3.Enter a Rule Name, Description, Service name, Event Type then click on create rule