SnmpKit v0.3.2 Release Notes
Release Date: 2024-12-19
Version: 0.3.2
Git Tag: v0.3.2
๐ฏ 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 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
โ 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. ๐ก 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. ๐ Enterprise Router
- Cisco IOS simulation with multiple interfaces
- FastEthernet, Serial, and Loopback interfaces
- Realistic routing and SNMP statistics
3. ๐ 24-Port Managed Switch
- Programmatically generated port structure
- Realistic port states (active/inactive)
- Enterprise switch management OIDs
4. ๐ถ Dual-Band Wireless Access Point
- 2.4GHz and 5GHz radio simulation
- Channel configuration and client counts
- Wireless-specific enterprise MIBs
5. ๐จ๏ธ Network Printer
- HP LaserJet enterprise printer simulation
- Toner/supply level monitoring
- Job statistics and paper tray status
๐ Documentation Enhancements
Comprehensive Examples Added
New Example Files:
examples/quick_cable_modem.exs
- Simplest device creation approachexamples/cable_modem_simulation.exs
- Advanced simulation techniquesexamples/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
๐ ๏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
๐ Platform Compatibility
Universal Deployment
The self-contained approach makes SnmpKit accessible everywhere:
- โ Livebook Cloud - No file upload requirements
- โ Docker Containers - Self-contained execution
- โ Educational Environments - Zero setup friction
- โ CI/CD Pipelines - Reliable testing without file dependencies
- โ Development Laptops - Works without project structure
Easy Onboarding
New users can now:
- Open the Livebook
- Run cells sequentially
- See realistic SNMP devices responding immediately
- Learn by example without complex setup
๐ 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
- Unified API usage (
SnmpKit.SNMP
,SnmpKit.MIB
,SnmpKit.Sim
) - Performance optimization techniques
- Multi-target and bulk operations
- Error handling and troubleshooting
๐ Impact
Developer Experience
- โก Instant Gratification - Working examples in seconds
- ๐ Learning by Example - See real OID structures
- ๐ ๏ธ Practical Templates - Copy patterns for custom devices
- ๐ฏ No Friction - Works in any environment
Testing and Development
- ๐งช Realistic Testing - Accurate device behavior simulation
- ๐ Rapid Prototyping - Quick device profile creation
- ๐ Scale Testing - Multiple device population examples
- ๐ Educational Use - Perfect for learning SNMP concepts
๐ง 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
- โ All 1,140 tests passing
- โ Zero compiler warnings
- โ Livebook validates completely
- โ All device simulations tested
๐ Upgrade Instructions
# Update your dependency
{:snmpkit, "~> 0.3.2"}
Migration: No code changes required! This enhances the learning experience without affecting existing functionality.
๐ฏ 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
๐ Version Comparison
Feature | v0.3.1 | v0.3.2 |
---|---|---|
Livebook Dependencies | โ Requires walk files | โ Self-contained |
Device Examples | ๐ด Limited | โ 5 comprehensive types |
Learning Value | ๐ก Basic | โ Educational platform |
Deployment | ๐ด Environment-dependent | โ Universal |
Setup Complexity | ๐ด File management | โ 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.