---
features:
  - |
    A new configuration option, ``cleanup_on_shutdown``, was added to the
    L3 agent. If set to True the L3 agent will explicitly delete all routers
    on shutdown. For L3 HA routers it includes a graceful shutdown of
    keepalived and the state change monitor, which will allow a faster failover
    in certain conditions. The default value of ``cleanup_on_shutdown`` is
    False to maintain backward compatibility. Setting to True could affect
    the data plane when stopping or restarting the L3 agent.