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 L3 agent

Use the following options in the l3_agent.ini file for the L3 agent.

Table 8.56. Description of L3 agent configuration options
Configuration option = Default value Description
agent_mode = legacy (StrOpt) The working mode for the agent. Allowed modes are: 'legacy' - this preserves the existing behavior where the L3 agent is deployed on a centralized networking node to provide L3 services like DNAT, and SNAT. Use this mode if you do not want to adopt DVR. 'dvr' - this mode enables DVR functionality and must be used for an L3 agent that runs on a compute host. 'dvr_snat' - this enables centralized SNAT support in conjunction with DVR. This mode must be used for an L3 agent running on a centralized node (or in single-host deployments, e.g. devstack)
allow_automatic_l3agent_failover = False (BoolOpt) Automatically reschedule routers from offline L3 agents to online L3 agents.
enable_metadata_proxy = True (BoolOpt) Allow running metadata proxy.
external_network_bridge = br-ex (StrOpt) Name of bridge used for external network traffic.
gateway_external_network_id = (StrOpt) UUID of external network for routers implemented by the agents.
ha_confs_path = $state_path/ha_confs (StrOpt) Location to store keepalived/conntrackd config files
ha_vrrp_advert_int = 2 (IntOpt) The advertisement interval in seconds
ha_vrrp_auth_password = None (StrOpt) VRRP authentication password
ha_vrrp_auth_type = PASS (StrOpt) VRRP authentication type AH/PASS
handle_internal_only_routers = True (BoolOpt) Agent should implement routers with no gateway
l3_ha = False (BoolOpt) Enable HA mode for virtual routers.
l3_ha_net_cidr = (StrOpt) Subnet used for the l3 HA admin network.
max_l3_agents_per_router = 3 (IntOpt) Maximum number of agents on which a router will be scheduled.
min_l3_agents_per_router = 2 (IntOpt) Minimum number of agents on which a router will be scheduled.
router_id = (StrOpt) If namespaces is disabled, the l3 agent can only configure a router that has the matching router ID.
send_arp_for_ha = 3 (IntOpt) Send this many gratuitous ARPs for HA setup, if less than or equal to 0, the feature is disabled

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