VXLAN defines “multipod” as a scenario in which multiple, independent L2 networks, or “pods”, are created within the physical infrastructure of a single organization.
It is useful to deploy VXLAN multipods when you want to do the following:
Within a single physical infrastructure, it is possible to isolate different types of workloads or tenants.
For security or compliance reasons, it may be necessary to segment the network.
The physical network can be made simpler by reducing the complexity of L3 routing.
Reduce the number of VLANs required in the physical network by reducing the number of VLANs.
When you deploy a VXLAN multipod solution, a single VXLAN network identifier (VNID) is used to identify each pod, enabling the creation of isolated L2 networks within a single physical infrastructure based on a single VXLAN network identification (VNID).
The VNID acts as a virtual VLAN ID and allows the creation of multiple, isolated L2 networks within a single physical infrastructure by acting as a virtual VLAN ID. In order to extend the L2 network across the various pods, VXLAN Tunnel Endpoints (VTEPs) are used to establish tunnels between these pods, which allows the L2 network to be extended across the different pods via the tunnels.
The advantages of this approach are that it allows for greater flexibility and scalability when designing a network, as well as allowing the isolation of different types of workloads or tenants within one physical infrastructure.