Networking & Hardware

Network Design & Architecture

Network Topology Design

• Proficiency: Advanced
• Key Skills:
  • Network segmentation and VLANs
  • Subnet design and IP planning
  • Network redundancy and failover
  • Bandwidth estimation and planning
  • Latency optimization
  • Network monitoring design

VLAN Configuration

• Proficiency: Intermediate-Advanced
• Applications:
  • Service isolation (management, services, guests)
  • Security through segmentation
  • QoS (Quality of Service) implementation
  • Management network separation
  • Guest network isolation

High-Speed Networking

2.5Gbps Networking

• Proficiency: Advanced
• Implementation:
  • 2.5Gbps Ethernet ports
  • CAT6A/CAT7 cabling
  • Unmanaged switches (8x2.5Gbps + 1x10Gbps)
  • USB 3.0 to 2.5Gbps adapters
  • Homelab backbone upgrade

10Gbps/SFP+ Networking

• Proficiency: Intermediate
• Components:
  • SFP+ transceiver understanding
  • 10Gbps switch ports
  • DAC (Direct Attach Cable) vs fiber optics
  • Breakout cables and adapters
  • Cost-performance analysis

Network Cabling

Cabling Standards

• CAT5e/CAT6/CAT6A/CAT7
• Fiber optic basics
• Shielded vs unshielded
• Cable management and organization
• Future-proofing considerations

Installation & Best Practices

• Proper cable termination
• Testing and validation
• Labeling and documentation
• Maintenance and monitoring
• Upgrade planning

Network Hardware

Switches

Managed Switches:

• VLAN support and tagging (802.1Q)
• Port mirroring and spanning tree
• QoS configuration
• Management interfaces (web, SSH, SNMP)

Unmanaged Switches:

• Plug-and-play simplicity
• Cost-effectiveness
• Line-rate switching
• No configuration needed

Specific Equipment (Homelab)

Horatio 2.5Gbps Switches:

• Model ZX-SWTG018AS (8x2.5Gbps + 1x10Gbps)
• Model HYWS-SGT0204S (4x2.5Gbps + 2x10Gbps)
• Cost-effective 10GbE introduction
• Passive cooling (no fans)

Planned Managed Switch:

• TP-Link or similar managed switch
• 8+ SFP+ ports minimum
• VLAN support
• ~525€ budget range

Routing & Firewalls

• OPNsense/pfSense appliances
• Intel N305-based firewall (planned)
• Stateful firewall rules
• VLAN support
• VPN capabilities

Network Protocol Knowledge

Ethernet & IP

• Ethernet frames and switching
• IPv4 addressing and subnetting
• IPv6 basics and deployment
• ARP (Address Resolution Protocol)
• DNS and DHCP services

Advanced Protocols

• VLAN tagging (802.1Q)
• Spanning Tree Protocol (STP/RSTP)
• Link Aggregation (LAG)
• Multicast and unicast
• VPN protocols (WireGuard, OpenVPN)

Hardware Selection & Procurement

Server Hardware

CPU Selection

• Proficiency: Advanced
• Knowledge:
  • x86-64 architecture understanding
  • Multi-socket vs single-socket
  • Core vs thread count analysis
  • Power consumption and TDP
  • Virtualization features (Intel-VT, AMD-V)
  • IOMMU/SR-IOV for passthrough

Specific CPUs (Homelab)

• AMD Ryzen 5 5600G: 6-core consumer processor

  • Integrated graphics
  • Low TDP (~35W base)
  • Good price-performance ratio
  • PCIe 4.0 support

• Intel N305: Energy-efficient SoC

  • Low power (15W TDP)
  • Embedded solution
  • Quad cores
  • Integrated networking (4x 2.5GbE)

RAM Selection

• DRAM types (DDR4, DDR5)
• Capacity planning
• ECC vs non-ECC
• Speed and timings
• Multi-channel configuration

Storage Hardware

NVMe SSDs:

• PCIe generation (3.0, 4.0, 5.0)
• Form factors (M.2, U.2)
• QLC vs TLC vs SLC NAND
• Performance characteristics
• Thermal management

SATA SSDs:

• 2.5" form factor
• Performance vs cost
• Reliability ratings
• Firmware updates
• Write endurance (TBW)

Hard Drives (HDD):

• 3.5" datacenter drives
• RPM (5400, 7200, 10k)
• Capacity options
• RAID-capable drives
• Helium-filled vs traditional
• Noise and power characteristics

Example Setup (Homelab):

• 2TB NVMe per node (system)
• 2TB SATA SSD per node (cache)
• 20TB HDDs for storage servers
• Ceph distribution across nodes

Motherboard & Chipset Selection

• Proficiency: Intermediate-Advanced
• Considerations:
  • Socket type and CPU compatibility
  • PCIe slot count and generation
  • RAM slot count and support
  • SATA and M.2 connectivity
  • Onboard networking
  • IPMI/OOB management
  • BIOS features (virtualization, IOMMU)

Power Supply & UPS

Power Supply Selection

• Wattage calculation
• Efficiency ratings (80+ Bronze/Gold/Platinum)
• Modular vs non-modular
• Brand reliability
• Redundancy options

UPS (Uninterruptible Power Supply)

• Battery backup time estimation
• Load calculation
• Automatic failover
• Network-connected UPS for monitoring
• Graceful shutdown sequencing

Cooling & Thermal Management

Air Cooling

• Fan placement and airflow
• Heatsink selection
• Dust filtration
• Noise levels
• Thermal monitoring

Liquid Cooling

• Custom loops vs AIO (All-In-One)
• Pump reliability
• Maintenance requirements
• Performance benefits
• Cost considerations

Case Selection

Server Cases

• Proficiency: Intermediate
• Considerations:
  • Form factor (2U, 4U, tower)
  • Drive bay capacity
  • Cooling performance
  • Cable management
  • Noise levels
  • Cost and availability

Specific Cases (Homelab)

• Standard ATX tower cases
• Planned: 2U rackmount (Data Boxes)
• Fractal Design Node 304 (NAS)

Hardware Procurement & Cost Management

Procurement Sources

• Proficiency: Intermediate-Advanced
• Vendors:
  • AliExpress (Asia, long shipping, cheap)
  • eBay (local pickup, established sellers)
  • German retailers (quick shipping, support)
  • Professional distributors (bulk, warranty)

Cost Analysis

• Total Cost of Ownership (TCO)
• Power consumption costs
• Replacement and warranty
• Depreciation
• Performance per watt
• Price-performance ratios

Building Buying Lists

• Component compatibility checking
• Future upgrade paths
• Stock availability
• Shipping and import considerations
• Budget allocation

Example Procurement (2025 Homelab)

• Data Box 1 & 2: High-capacity storage servers
• PVE-N305-1: Energy-efficient NAS appliance
• Managed central switch
• 10GbE networking equipment
• Uninterruptible Power Supply (UPS)
• CAT7 cabling and connectors

Physical Infrastructure

Rack & Space Planning

Rack Configuration

• 19" standard racks
• U-height calculation
• Mounting rails and brackets
• Airflow planning
• Power distribution units (PDU)
• Cable trays and management

Space Utilization

• Server density
• Cooling requirements
• Cable routing
• Future expansion
• Maintenance access

Cable Management

Structured Cabling

• Cable runs and routing
• Conduit and cable trays
• Patch panels
• Cross-connect blocks
• Documentation and labeling

Homelab Implementation

• 50m CAT7 bulk cable
• 8 networking terminals (~50€)
• Cable management rails (~100€)
• Proper organization and labeling
• Future apartment readiness

Environmental Monitoring

Temperature & Humidity

• Monitoring placement
• Acceptable ranges (18-27°C)
• Humidity management (30-50%)
• Alert thresholds
• Seasonal adjustments

Power Monitoring

• Kill-a-watt meters for testing
• PDU with power metering
• Consumption tracking
• Cost optimization

Network Performance & Optimization

Bandwidth Planning

• Proficiency: Intermediate
• Concepts:
  • Throughput vs latency
  • Bottleneck identification
  • Traffic shaping
  • QoS configuration
  • Headroom planning (aim for <50% utilization)

Latency Optimization

• Cable path optimization
• Switch selection for low latency
• Buffer management
• MTU (Maximum Transmission Unit) tuning
• Jitter reduction

Redundancy & Resilience

High Availability Design

• Redundant paths
• Failover mechanisms
• Load balancing
• Monitoring for quick recovery
• Graceful degradation

Network Redundancy

• Dual uplinks
• Spanning Tree Protocol
• Link aggregation (bonding)
• VLAN trunk redundancy

Network Monitoring & Diagnostics

Tools & Techniques

• ping: Basic connectivity
• traceroute: Path discovery
• iperf: Bandwidth testing
• tcpdump: Packet analysis
• netstat/ss: Connection statistics
• mtr: Continuous path monitoring

Network Performance Testing

Baseline Establishment

• Speed testing
• Latency measurements
• Packet loss detection
• Jitter analysis
• Consistency over time

Troubleshooting

• Packet capture and analysis
• Interface statistics
• Switch port monitoring
• Cable testing
• Speed negotiation issues

Virtualization-Specific Networking

Proxmox Networking

• Proficiency: Advanced
• Features:
  • Bridge configuration
  • Linux network stack
  • Virtual machine networking
  • VLAN trunking to VMs
  • OVS (Open vSwitch) integration

Container Networking

Docker Networking

• Bridge mode
• Host mode
• Overlay networks (multi-host)
• Custom network drivers
• Port mapping and exposure

Kubernetes Networking

• Cluster networking
• Service networking
• Ingress controllers
• Network policies

Security in Network Design

Network Segmentation

• DMZ design
• Service-to-service isolation
• Guest network separation
• Management network isolation
• Principle of least privilege

Firewall Rules

• Stateful inspection
• Default deny philosophy
• Port whitelisting
• Rate limiting
• DDoS mitigation rules

Encryption in Transit

• VPN setup (WireGuard, OpenVPN)
• TLS/SSL everywhere
• Certificate management
• Key exchange protocols

Sustainability & Power Efficiency

Power Consumption Analysis

• CPU TDP and actual consumption
• Idle vs load power draw
• Seasonal variation
• Cost optimization (off-peak hours)
• Renewable energy considerations

Energy-Efficient Hardware Selection

• N305 low-power CPU
• 5600G moderate power
• SSD over HDD where appropriate
• Efficient PSU ratings
• Passive components where possible

Best Practices

Infrastructure Design

• Future-proof with current technology
• Over-provision for growth
• Simplicity over complexity
• Resilience and fault tolerance
• Monitoring from the start
• Documentation as you go

Procurement

• Thorough research and reviews
• Check compatibility before buying
• Buy from reputable sellers
• Plan for warranties and support
• Keep receipts and records
• Budget contingency (10-20%)

Maintenance

• Regular firmware updates
• Cable and connection inspection
• Thermal monitoring and cleaning
• Performance benchmarking
• Documentation updates

Continuous Learning

This is a rapidly evolving field requiring:

• Regular research of new technologies
• Testing and validation in lab environment
• Community engagement (homelabbing forums)
• Following industry trends
• Experiment-driven learning
• Documenting and sharing findings