Lesson 3: Multi-Tenancy
Presented by David Jansen and Lukas Krattiger
In this third video, from the Fundamentals of Multi-Tenancy in VXLAN series, CCIE Cisco Press authors David Jansen and Lukas Krattiger discuss Multi-Tenancy: A mode of operation in which multiple independent instances (i.e tenants/VRF/VLAN) operate in a shared environment. Each instance is logically isolated but physically integrated. In the BGP EVPN VXLAN overlay network, David introduces VXLAN network identifiers (VNIs), which define the Layer-2 domains and enforce Layer-2 segmentation by not allowing Layer-2 traffic to traverse VNI boundaries. Similarly, Lukas introduces Layer-3 segmentation by applying Layer-3 virtual routing and forwarding (VRF) technology, and he enforces routing isolation between tenants by using a separate Layer-3 VNI mapped to each VRF instance. Each tenant has its own VRF routing instance. IP subnets of the VNIs for a given tenant are in the same Layer-3 VRF instance that separates the Layer-3 routing domain from the other tenants. Both David and Lukas reinforce the material by providing past and current Multi-Tenancy Layer-2 and Layer-3 configuration examples.