We have a MX104 w/ 18.1R3-S4.2 playing the role as subscriber management for our network. We have about 10k end-users terminating they PPPoE tunnels on this box.
We are using LACP + DMUX interfaces. Some users come from normal dot1q vlans, and some users come from QinQ vlans.
After a massive user disconnection (eletric residential outage), the users weren't able to setup the pppoe connection.
Looking at the logs doesn't help much. The radius server was online, and reporting access-accept when using the "test aaa ppp" command. The only process that was "different" is bbe-mibd, consuming from 60% to 75% in the "show system processes extensive".
To workaround, we shut down all vlans, and bring up it in a controlled manner.
Now , we have 10k users online, but the bbe-mibd process is still using +60% of the CPU.
*I have attached the dynamic-profile configuration
What is the subscriber scale you have on MX104? I can see you've configured interface-mib as well. Please disable it and monitor the bbe-mib process. Subscribers should relogin for changes to get effect.