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Use the following options in the l3_agent.ini
file for the L3 agent.
| Configuration option = Default value | Description |
|---|---|
| [DEFAULT] | |
| 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 = 169.254.192.0/18 | (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 |

