Understanding VRF and Routing Instances:

In an EVPN-VXLAN overlay network, multiple tenants are separated using unique VRF (Virtual

Routing and Forwarding) instances. Each VRF instance maintains its own routing table, allowing for

isolated routing domains within the same network infrastructure.

Role of Route Distinguisher:

Route Distinguisher (RD): The RD is a unique identifier used in MPLS and EVPN environments to

distinguish routes belonging to different VRFs. The RD is prepended to the IP address in the route

advertisement, ensuring that routes from different tenants remain unique even if they use the same

IP address range.

Correct Property:

D. the route distinguisher value: This is the correct answer because the RD is crucial in determining

which routing information belongs to which VRF instance. It ensures that each VRF’s routing table

only contains relevant routes, maintaining isolation between tenants.

Data Center Reference:

The RD is a key element in MPLS and EVPN-based multi-tenant environments, ensuring proper

routing segregation and isolation for different VRFs within the data center fabric.