I'd like to benchmark an LNS using bngblaster: in this case, bngblaster would simulate the LAC(s) and their clients, initiating:

• L2TP tunnels (one per simulated LAC)
• L2TP sessions (one per simulated client)
• PPP sessions (one per simulated client, inside L2TP sessions)

Bngblaster already supports LAC testing (simulating an LNS), so a part of the L2TP protocol is already implemented.

I have a working implementation for this feature, I will send a pull request.