SnmpKit v0.3.2 Release Notes

Release Date: 2024-12-19
Version: 0.3.2
Git Tag: v0.3.2

๐ŸŽฏ Major Improvements

Self-Contained Livebook Tour

This release completely transforms the SnmpKit interactive experience by making the Livebook tour fully self-contained without any external file dependencies.

Key Changes

โŒ Before (v0.3.1):

  • Required walk files in priv/walks/ directory
  • Relative path dependencies that often failed
  • Complex setup requirements
  • Limited to pre-existing device profiles

โœ… After (v0.3.2):

  • Zero file dependencies - works anywhere instantly
  • Complete device creation examples using manual OID definitions
  • Five realistic device types with comprehensive OID structures
  • Educational value - shows exactly how SNMP devices work

New Device Simulation Examples

The updated Livebook now demonstrates creating realistic network devices from scratch:

1. ๐Ÿ“ก DOCSIS Cable Modem

cable_modem_oids = %{
  "1.3.6.1.2.1.1.1.0" => "ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem",
  "1.3.6.1.2.1.10.127.1.2.2.1.15.2" => 35,  # Signal/Noise ratio
  # ... comprehensive DOCSIS OID structure
}

2. ๐Ÿ”€ Enterprise Router

  • Cisco IOS simulation with multiple interfaces
  • FastEthernet, Serial, and Loopback interfaces
  • Realistic routing and SNMP statistics

3. ๐Ÿ”Œ 24-Port Managed Switch

  • Programmatically generated port structure
  • Realistic port states (active/inactive)
  • Enterprise switch management OIDs

4. ๐Ÿ“ถ Dual-Band Wireless Access Point

  • 2.4GHz and 5GHz radio simulation
  • Channel configuration and client counts
  • Wireless-specific enterprise MIBs

5. ๐Ÿ–จ๏ธ Network Printer

  • HP LaserJet enterprise printer simulation
  • Toner/supply level monitoring
  • Job statistics and paper tray status

๐Ÿ“š Documentation Enhancements

Comprehensive Examples Added

New Example Files:

  • examples/quick_cable_modem.exs - Simplest device creation approach
  • examples/cable_modem_simulation.exs - Advanced simulation techniques
  • examples/cable_modem_profile.json - Structured JSON profile template

Educational Value

The Livebook now serves as a complete SNMP education platform:

  • OID Structure Learning - See how real device OIDs are organized
  • Data Type Examples - Counter32, TimeTicks, Gauge32, etc.
  • Enterprise MIBs - Cisco, HP, Ubiquiti vendor-specific OIDs
  • Device Behavior - Counters increment, values fluctuate realistically

๐Ÿ› ๏ธ Technical Improvements

Device Creation Methods

The release showcases multiple approaches for creating simulated devices:

Method 1: Manual OID Maps

{:ok, profile} = SnmpKit.SnmpSim.ProfileLoader.load_profile(
  :device_type,
  {:manual, oid_map},
  behaviors: [:counter_increment, :time_based_changes]
)

Method 2: JSON Profiles

{:ok, profile} = SnmpKit.SnmpSim.ProfileLoader.load_profile(
  :device_type,
  {:json_profile, "device.json"}
)

Method 3: Programmatic Generation

# Generate 24 switch ports programmatically
switch_oids = Enum.reduce(1..24, %{}, fn port, acc ->
  Map.merge(acc, %{
    "1.3.6.1.2.1.2.2.1.2.#{port}" => "GigabitEthernet0/#{port}",
    "1.3.6.1.2.1.2.2.1.8.#{port}" => 1  # operational status
  })
end)

Behavioral Simulation

Enhanced support for realistic device behaviors:

  • Counter Increment - Traffic counters automatically increase
  • Time-Based Changes - Values evolve over time
  • Signal Fluctuation - Wireless/cable signal levels vary
  • Supply Depletion - Printer toner levels decrease
  • Job Simulation - Print job processing

๐Ÿš€ Platform Compatibility

Universal Deployment

The self-contained approach makes SnmpKit accessible everywhere:

  • โœ… Livebook Cloud - No file upload requirements
  • โœ… Docker Containers - Self-contained execution
  • โœ… Educational Environments - Zero setup friction
  • โœ… CI/CD Pipelines - Reliable testing without file dependencies
  • โœ… Development Laptops - Works without project structure

Easy Onboarding

New users can now:

  1. Open the Livebook
  2. Run cells sequentially
  3. See realistic SNMP devices responding immediately
  4. Learn by example without complex setup

๐ŸŽ“ Learning Outcomes

After completing the updated tour, users understand:

SNMP Fundamentals

  • How OID hierarchies are structured
  • Different SNMP data types and their uses
  • Enterprise vs. standard MIB organizations
  • Device-specific OID patterns

Practical Skills

  • Creating custom device simulations
  • Structuring OID maps for different device types
  • Using behaviors for realistic simulation
  • Testing SNMP applications against simulated devices

SnmpKit Mastery

๐Ÿ“Š Impact

Developer Experience

  • โšก Instant Gratification - Working examples in seconds
  • ๐Ÿ“– Learning by Example - See real OID structures
  • ๐Ÿ› ๏ธ Practical Templates - Copy patterns for custom devices
  • ๐ŸŽฏ No Friction - Works in any environment

Testing and Development

  • ๐Ÿงช Realistic Testing - Accurate device behavior simulation
  • ๐Ÿ”„ Rapid Prototyping - Quick device profile creation
  • ๐Ÿ“ˆ Scale Testing - Multiple device population examples
  • ๐ŸŽ“ Educational Use - Perfect for learning SNMP concepts

๐Ÿ”ง Technical Details

No Breaking Changes

  • All existing APIs remain unchanged
  • Full backward compatibility maintained
  • No functional changes to core SNMP operations
  • Walk file support still available for existing users

Quality Assurance

  • โœ… All 1,140 tests passing
  • โœ… Zero compiler warnings
  • โœ… Livebook validates completely
  • โœ… All device simulations tested

๐Ÿš€ Upgrade Instructions

# Update your dependency
{:snmpkit, "~> 0.3.2"}

Migration: No code changes required! This enhances the learning experience without affecting existing functionality.

๐ŸŽฏ What's Next

Future Enhancements

  • Additional device type examples (firewalls, load balancers)
  • Advanced simulation behaviors (fault injection, performance degradation)
  • Integration examples with monitoring platforms
  • MIB compilation tutorials

Community Contributions

We encourage the community to:

  • Share device profiles for different vendors
  • Contribute realistic OID mappings
  • Suggest additional simulation behaviors
  • Improve documentation and examples

๐Ÿ“ˆ Version Comparison

Featurev0.3.1v0.3.2
Livebook DependenciesโŒ Requires walk filesโœ… Self-contained
Device Examples๐Ÿ”ด Limitedโœ… 5 comprehensive types
Learning Value๐ŸŸก Basicโœ… Educational platform
Deployment๐Ÿ”ด Environment-dependentโœ… Universal
Setup Complexity๐Ÿ”ด File managementโœ… Zero setup

Previous Release: v0.3.1 - Improved Simulation Documentation

Upgrade today and experience SNMP learning without barriers!

For questions or support, please visit the GitHub repository.