The DvR feature supports redistribution of IPv4 local and static routes into the DvR domain.
Note
For every VRF instance and the Global Router, the Controller automatically injects a default route to the Leaf node, with a next hop as the advertising Controller. However, if you require only local or static routes to be advertised to the Leaf nodes, you can manually disable the injection of default routes on the Controller.
On a DvR Controller, you can configure (enable or disable) the redistribution of direct or static routes. Direct routes are redistributed with the route type as internal. Static routes are redistributed with the route type as external. You can apply route policies on the Controller to selectively permit the redistribution of these routes and also configure a metric value for the route that is redistributed. The default metric for imported local routes is 1. For static routes, the configured route metric or cost is honored.
You can configure redistribution of static and direct routes from the Global Router, or within a VRF instance. For redistributed routes, the Controller configures the Layer 3 VSN as that of the VRF redistributing the route, and the next hop BEB as the system ID of the Controller injecting the route into the DvR domain.
The following example demonstrates how a DvR Leaf node benefits from the redistribution of local and static routes.
By default, if the injection of default routes is enabled on a DvR Controller, the DvR Leaf node can only route traffic to other nodes within the DvR enabled subnet. For the Leaf node to reach networks outside of the DvR enabled subnet, the Controllers must redistribute local and static routes from non-DvR subnets into the DvR domain. In the following figure, the DvR Leaf L1 can route traffic only to nodes in the DvR enabled subnet 10.10.10.0/24. To be able to reach hosts in VLAN 20 (20.20.20.0/24) or VLAN 30 (30.30.30.0/24), redistribution of local routes into DvR is required at each of the Controllers C1 and C2. For the Leaf node to reach hosts in remote networks 40.40.40.0/24 or 50.50.50.0/24, redistribution of static routes to the DvR domain is required.
You can apply route policies to control which local or static routes are to be redistributed into the DvR domain.
