Hi @dimka_88. man, I've had several scenarios! I recently saw a PPPoE server with some 3000 sessions using fq_codel
what I perceive as the main factor for this is whether the speeds used by subscribers are high or low, the cases where you have many sessions in the same box with low speeds tend to consume more cpu.
if you have a management system that communicates with the OLT and creates the profiles, the task is simple. here in Brazil we have at least 3 systems that do this in a "silent" way, facilitating the work ...