Dell EMC Networking OS Configuration Guide for the S5048F–ON System 9.14.2.4

Route Leaking is a powerful feature that enables communication between isolated (virtual) routing domains by segregating and sharing a set of services such as VOIP, Video, and so on that are available on one routing domain with other virtual domains. Inter-VRF Route Leaking enables a VRF to leak or export routes that are present in its RTM to one or more VRFs.

Dynamic Route Leaking enables a source VRF to share both its connected routes as well as dynamically learnt routes from various protocols, such as ISIS, OSPF, BGP, and so on, with other default or non-default VRFs.

You can also leak global routes to be made available to VRFs. As the global RTM usually contains a large pool of routes, when the destination VRF imports global routes, these routes will be duplicated into the VRF's RTM. As a result, it is mandatory to use route-maps to filter out leaked routes while sharing global routes with VRFs.