4.7 KiB
DRAgent Drivers
Introduction
The Neutron dynamic routing drivers are used to support different dynamic routing protocol stacks which implement the dynamic routing functionality.
As shown in the following figure, the drivers are managed by DRAgent through a "Driver Manager" which provides consistent APIs to realize the functionality of a dynamic routing protocol:
Neutron Dynamic Routing Drivers
+-------------------------------+
| DRAgent |
| |
| +-------------------------+ |
| | Driver Manager | |
| +-------------------------+ |
| | Common Driver API | |
| +-------------------------+ |
| | |
| | |
| +------------+------------+ |
| | os-ken | Other | |
| | Driver | Drivers | |
| +------------+------------+ |
| |
+-------------------------------+Note
In the first release, only the integration with os-ken is supported. Later release will have support for Quagga, Bird etc. Besides, BGP is the only protocol supported now but support for more dynamic routing protocols might come in the future.
Configuration
Driver configurations are done in a separate configuration file.
BGP Driver
There are two configuration parameters related to BGP which are
specified in bgp_dragent.ini.
- bgp_speaker_driver, to define BGP speaker driver class. Default is os-ken (neutron_dynamic_routing.services.bgp.agent.driver.os_ken.driver.OsKenBgpDriver).
- bgp_router_id, to define BGP identity (typically an IPv4 address). Default is a unique loopback interface IP address.
Common Driver API
Common Driver API is needed to provide a generic and consistent interface to different drivers. Each driver need to implement the provided base driver class.
BGP
Following interfaces need to be implemented by a driver for realizing BGP functionality.
| API name | Description |
|---|---|
| add_bgp_speaker() | Add a BGP Speaker |
| delete_bgp_speaker() | Delete a BGP speaker |
| add_bgp_peer() | Add a BGP peer |
| delete_bgp_peer() | Delete a BGP peer |
| advertise_route() | Add a new prefix to advertise |
| withdraw_route() | Withdraw an advertised prefix |
| get_bgp_speaker_statistics() | Collect BGP Speaker statistics |
| get_bgp_peer_statistics() | Collect BGP Peer statistics |