blob: e40774a9d39ffc09d9d94cc1c61ce5bed960e826 [file] [log] [blame]
.. _OLT State Machine:
OLT State Machine
=================
In ``BBSim`` the device state is created using a state machine
library: `fsm <https://github.com/looplab/fsm>`__.
Here is a list of possible states for an OLT in BBSim:
.. list-table:: OLT States
:header-rows: 1
* -
- Initialized
- Enabled
- Disabled
- Deleted
* - Data model is created for OLT, NNIs, PONs and ONUs
- Starts the listener on the NNI interface and the DHCP server,
Starts the OLT gRPC server,
Moves the ONUs to ``initialized`` state
- Sends OLT, NNIs and PONs ``UP`` indications
Transition the ONUs into ``discovered`` state
- Transition the ONUs into ``disabled`` state
Sends OLT, NNIs and PONs ``UP`` indications
- Stops the OLT gRPC Server
Below is a diagram of the state machine allowed transitions:
.. graphviz::
digraph {
rankdir=TB
newrank=true
graph [pad="1,1" bgcolor="#cccccc"]
node [style=filled]
created -> initialized -> enabled -> disabled -> deleted
disabled -> enabled
deleted -> initialized
}