Computer Networks II: Network Management

• Computer Networks II concerns Computer Network Management for the Fall Semester (3).

Introduction to Network Management

• Network management goals include ensuring efficient network operation, monitoring performance, ensuring security, and managing faults.
• OSI Model & Network Management relates to the OSI model layers, specifically Layers 1-4.
• NMS (Network Management System) comprises the tools and platforms to monitor and manage network resources.

Network Management Frameworks

• SNMP (Simple Network Management Protocol) is used to collect and organize information about managed devices on IP networks.
• SNMP components include: Manager, Agent, and Management Information Base (MIB).
• SNMP versions: SNMPv1, SNMPv2c, SNMPv3.
• RMON (Remote Monitoring) is applied for monitoring network devices and is often integrated with SNMP.

Network Topology and Design

• Topological management designs the network layout, such as bus, star, or mesh.
• Performance metrics include throughput, latency, and error rates.

Network Fault Management

• Fault detection techniques detect network failures using ICMP pings and monitoring alerts.
• Troubleshooting tools include ping, traceroute, and telnet.
• Root cause analysis identifies the source of network issues.

Network Configuration Management

• Configuration management tools automate device settings like Ansible, Chef, and Puppet.
• Device configuration involves modifying and updating router, switch, and server configurations.

Network Performance Management

• Performance monitoring tools and protocols, like NetFlow, Wireshark, and iPerf, measure network performance.
• Traffic analysis focuses on understanding traffic flow and bottlenecks to optimize network usage.
• Quality of Service (QoS) prioritizes traffic to ensure critical services perform well.

Network Security Management

• Access control manages who can access the network to ensure only authorized users are allowed.
• Firewall management involves configuring and monitoring firewalls.
• Intrusion Detection Systems (IDS) monitor traffic for suspicious activity.

Bandwidth and Traffic Management

• Bandwidth utilization includes techniques for monitoring and optimizing bandwidth.
• Traffic shaping and policing manages network traffic to prevent congestion and ensure fair usage.

Backup and Disaster Recovery

• Network data backup makes sure regular backups of network configurations and critical data.
• Disaster recovery plans have steps to recover from major network failures, including data restoration and failover systems.

Network Documentation

• Network diagrams are visual representations of network structures.
• Configuration and change logs keep records of network settings and changes.

Emerging Technologies

• SDN (Software-Defined Networking) is a newer approach where network control is separated from hardware.
• Network automation automates network tasks and configurations using scripting and software tools.
• 5G networks manages next-gen networks with higher bandwidth and lower latency.