---
features:
  - |
    A new parameter ``router_factory`` has been added to
    ``neutron.agent.l3.L3AgentExtensionAPI``. Developers can register
    ``neutron.agent.l3.agent.RouterInfo`` class and delegate it for
    ``RouterInfo`` creation.

    Extensions can extend ``RouterInfo`` itself which correspond to each
    features (ha, distribtued, ha + distributed).