LanTopoLog: Simple Network Mapping Without the Bloat
LanTopoLog is a lightweight tool built for a very specific purpose — discovering network topology using SNMP and drawing maps based on real switch port data. It’s not a monitoring suite. It won’t flood you with metrics or graphs. Instead, it gives a clean and functional view of how your network is physically wired.
Ideal for small to mid-sized networks where visibility is limited and documentation is outdated, LanTopoLog offers a quick way to visualize your switch connections, MAC address tables, and VLAN setups — without relying on agents or cloud services.
What It Does Well
| Feature | Why It’s Useful |
| SNMP-based discovery | Detects switch connections and connected devices by querying SNMP data |
| Automatic topology maps | Builds real-time maps based on physical port connections |
| Port-to-host mapping | Correlates MAC addresses with switch ports and hostnames |
| No database required | Runs as a standalone Windows app — portable and easy to use |
| Syslog integration | Receives syslog events from supported devices |
Where It Fits
Small IT departments that need quick topology visibility
Networks with many unmanaged or legacy switches
Situations where switch CLI access is not available
Offline audits of cable tracing and port assignments
LanTopoLog isn’t trying to replace NetBox or enterprise DCIM platforms. It’s built for people who just want to know what’s connected where — and need that answer right now, without setting up a server or database.
LanTopoLog 2 versions and licence
| Item | Details (lantopolog.com, checked 23 October 2026) |
| Current stable build | LanTopoLog 2, version 2.53.14: a portable ZIP for Windows (no installer; start lantopolog.exe after extracting). The version history lists 2.53 on 17 December 2025. |
| Beta | LanTopoLog 2 3.0.1 beta; the version history lists 3.0 on 19 October 2026. Use the stable build unless you want to test the beta. |
| Linux | LanTopoLog 2 2.52.9 for Linux (AMD64). Make the file executable and install the Net-SNMP utilities package (snmp) when the program asks for it. |
| Windows service | A separate service manager tool can run LanTopoLog as a Windows service. |
| Licence | Shareware by Yuriy Volokitin. The unregistered version has full functionality for testing and evaluation, but some features work for a limited time. The vendor states that topology discovery works without limitations in the unregistered version. Updates are free. |
FAQ
Is LanTopoLog free?
LanTopoLog is shareware. You can download and run it without registering, and the vendor says the unregistered version has full functionality for testing and evaluation, with topology discovery working without limits. Some features work only for a limited time, and long-term use needs a registration; see the vendor’s Buy page for the current price.
What is the difference between LanTopoLog and LanTopoLog 2?
They are the same program line from the same author. The vendor’s current downloads are all named LanTopoLog 2 (stable 2.53.14, beta 3.0.1, Linux build 2.52.9).
Does LanTopoLog work on Linux or macOS?
There is a Linux build (2.52.9, AMD64) and a Windows build. The vendor lists no macOS version.
What does LanTopoLog need to draw a network map?
SNMP must be enabled and readable on the switches. LanTopoLog queries them and builds the physical topology from the port and MAC address data. It does not need a database or an agent on the devices.
What are alternatives to LanTopoLog?
Other network discovery and monitoring tools in this catalogue are NetDisco, OpenNMS and PRTG. Unlike LanTopoLog they are server-based discovery or monitoring platforms, so they take longer to set up but cover more than a topology map.