Welcome to the Thola / NESi stand!

The team behind Thola and NESi focuses on new software ideas in networking, monitoring and simulation. At this stand we are happy to present you our two newest projects, which we both launched in 2020!


Thola is a new open source tool for reading, monitoring and provisioning (coming soon) network devices written in Go. It serves as a unified interface for communication with network devices and features a check mode which complies with the monitoring plugins development guidelines and is therefore compatible with Nagios, Icinga, Zabbix, Checkmk, etc.

  • reading, monitoring and configuring (coming soon) network devices from Cisco, Juniper, Nokia/ISAM, Brocade, Huawei and many more
  • support for different network device types like switches, routers, WDM, directional radio, UPS, DSLAM/OLT,... including type specific requests and checks
  • an easy way for adding support for additional devices by YAML configuration files
  • support for different network protocols like SNMP, HTTP(S), telnet/ssh (coming soon) and more
  • a check plugin mode compatible with Icinga, Nagios, Zabbix, Checkmk, ...
  • a REST API mode
  • low resource needs
Links & Informations


With the NESi software we aim at simulating certain points of a network.

At the Moment we are able to simulate DSLAMs (Digital Subscriber Line Multiplexer) of various vendors including Alcatel, Huawei and KeyMile to name the most popular.

The software itself can simulate the vendors OS running on the network-device and allows the user to configure the amount of network cards, the number of ports on said cards and connected CPEs (Customer Premises Equipment). In the OS itself the user is able to change certain values to configure the device. The traffic on ports can be limited and ports can be dis-/ enabled completely allowing the user to simulate a DSLAM. NESi also comes with a handy GUI which allows easier configuration of network-devices.

The idea of the software originated from Ilya Etingof, the creator of snmpsim. A python based software to simulate snmp calls to a network-device. In a future release of NESi we are planning on integrating snmpsim into our framework as well.

Links & Informations

Thola / NESi @ FOSDEM

Come to our stand to meet the team behind Thola & NESi, get up to date with the latest developments (will there be Thola & NESi in 2022? does Niklas really have a moose suit? does the NESi team really exist?) and get a chance to get some of our limited swag. We'll also demo some of our applications, such as Thola and our network simulator NESi. In short, something you definitely do not want to miss!

Our programme at Thola & NESi:
  • Saturday
    • 10:50 - 11:35: NESi (Talk)
    • 11:35 - 12:20: Introducing Thola (Talk)
    • 13:00 - 18:00: Developers of Thola & NESi in the chat
Welcome to the Thola / NESi stand

Thola / NESi in 2021

This would be the first time we have a stand on FOSDEM.

Thola and NESi are quite new projects, we would like to introduce them and have a chat with the community about future ideas.