Centralized Routing

Routers can be configured either in centralized mode or distributed mode.

In a centralized router, the routing configurations are configured only on the border leaf pairs. In case of distributed mode, the routing configurations are configured on the corresponding leaf nodes where the endpoints reside.

During router creation, you can provide centralized mode or distributed mode as input.

openstack router create R1 --distributed
openstack router create R2 --centralized

The default option is centralized. Use the following command to create centralized routing:

openstack router create R2

The L3 service plug-in passes this information to EFA and the EFA Tenant Service creates VRF or routing configurations on border leafs or on leaf nodes based on the configuration mode.

Note

For the version 2.4 release, the OpenStack integration works with only a single pair of border leaf devices. A centralized routing instance is created on the single pair of border leaf devices. You must ensure that only a single border leaf pair is added as part of the fabric creation.