+1 for containerlab. The ability to commit everything for the topology (including images) to a git repo is incredibly useful for sharing, study and analysis.

There's also a gui floating around for it and klabernetes for labs that need more resources than a single server. 

Tim's too modest to toot his own horn, but he also did an awesome presentation on using clab + netbox for network testing a few years ago. Highly recommended if you want to see what's possible with it. 

On Sat, Feb 1, 2025 at 7:57 AM Tim Raphael <raphael.timothy@gmail.com> wrote:
Containerlab is also one of the newest and fastest evolving options as well (https: //containerlab. dev/) - Tim On Wed, Apr 3, 2024, at 13: 13, aun Joe wrote: is there anysi network simulator for carrier networks ? well, from 2023 to 2024 there
Containerlab is also one of the newest and fastest evolving options as well (https://containerlab.dev/)


- Tim

On Wed, Apr 3, 2024, at 13:13, aun Joe wrote:
  is there anysi  network simulator for carrier networks ? 
  
   well,   from 2023 to 2024 there happes so many carrier network outage caused by network operation.
 
   to my limited knowledge ,   SP guru  from riverbed could simulate carrier network. but  I just checked 
 riverbed website,  SP guru  stop updating in 2014.

 joe