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Use the following options in the vpn_agent.ini
    file for the VPN agent.
| Configuration option = Default value | Description | 
|---|---|
| [ipsec] | |
| config_base_dir = $state_path/ipsec | (StrOpt) Location to store ipsec server config files | 
| ipsec_status_check_interval = 60 | (IntOpt) Interval for checking ipsec status | 
| [openswan] | |
| ipsec_config_template = /usr/lib/python/site-packages/neutron/services/vpn/device_drivers/template/openswan/ipsec.conf.template | (StrOpt) Template file for ipsec configuration | 
| ipsec_secret_template = /usr/lib/python/site-packages/neutron/services/vpn/device_drivers/template/openswan/ipsec.secret.template | (StrOpt) Template file for ipsec secret configuration | 
| [vpnagent] | |
| vpn_device_driver = ['neutron.services.vpn.device_drivers.ipsec.OpenSwanDriver'] | (MultiStrOpt) The vpn device drivers Neutron will use | 



