Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
ON THIS PAGE
 

IPv6 Underlay for an IPv4 EVPN-VXLAN Fabric

Overview

When configuring an IPv6 underlay, an additional challenge might be present for a network with an existing IPv4 EVPN-VXLAN overlay. In such a network, the virtual tunnel endpoint (VTEP) address is IPv4. The VXLAN overlay extends virtual tunnels (VTs) between VTEPs over the underlying IP fabric. To add an IPv6 underlay, the network needs to distribute this IPv4 address to the IPv6-only underlay. Certain platforms and releases support configuring your AI-ML data center to accomplish this when the IPV6 underlay is external BGP (EBGP).

Topology

This configuration is suited for a network with the following topology:

Figure 1: Network topology of IPv4 EVPN-VXLAN overlay with an IPv6 underlay Network topology of IPv4 EVPN-VXLAN overlay with an IPv6 underlay

Configuration

Follow these steps to send IPV4 network layer reachability information (NLRI) over the IPv6 address family in your EBGP underlay.

  1. Enable BGP to send IPV4 NLRI over the IPv6 address family.
  2. Verify that the IPv4 loopback address, which functions as the VTEP address, is reachable over the IPv6 address.
    In this example, the VTEP address is 192.168.255.255.
  3. You can now run IPv4 EVPN-VXLAN on an IPV6-only underlay.

Platform Support

See Feature Explorer for platform and release support.

Related Documentation