Comment 2 for bug 1799956

Neutron defaults (going back to the original commits):

neutron/conf/agent/database/agentschedulers_db.py
    cfg.BoolOpt('network_auto_schedule', default=True,
                help=_('Allow auto scheduling networks to DHCP agent.')),
    cfg.BoolOpt('allow_automatic_dhcp_failover', default=True,
                help=_('Automatically remove networks from offline DHCP '
                       'agents.')),

neutron/conf/db/l3_agentschedulers_db.py
    cfg.BoolOpt('router_auto_schedule', default=True,
                help=_('Allow auto scheduling of routers to L3 agent.')),
    cfg.BoolOpt('allow_automatic_l3agent_failover', default=False,
                help=_('Automatically reschedule routers from offline L3 '
                       'agents to online L3 agents.')),