Configuration procedures

The following are the basic configuration procedures used to set up VXLAN traffic.

  1. Prepare the underlay for VXLAN traffic.

    VXLAN uses a UDP tunnel to send L2 traffic over an L3 network. Any transport associated with VXLAN UDP packet is known as the underlay.

  2. Configure Jumbo MTU on the underlay VLANs between Virtual Tunnel Endpoints (VTEPs).

    VTEPs are the termination point of UDP VXLAN tunnels.

  3. When using different priorities on any overlay VLAN traffic, configure IP Differentiated Service (DSCP) QOS on all underlay VLANs between VTEPs.

    The L2 networks identified by the virtual network identifier (VNI) can also be referenced as the overlay networks.

  4. Enable VXLAN at the switch.
  5. Create the overlay VLAN and the Virtual IP network (if the device is an IP gateway).
  6. Create a virtual network instance and associate the instance with the overlay VLAN created in step-1.
  7. Repeat the same steps for any of the other access devices that are part of the overlay.
  8. Create VXLAN tunnels on each access device to the other access switches that are part of the overlay.
  9. Depending on which overlay VLANs are configured on each access switch, configure the VN-Tunnel mapping.

    This mapping basically instructs the device to carry the VN’s traffic on that tunnel.