Configuring EVPN VXLAN External Connectivity Restrictions for EVPN VXLAN External Connectivity, on page 1 Information About EVPN VXLAN External Connectivity, on page 1 How to Configure EVPN VXLAN External Connectivity, on page 6 Configuration Examples for EVPN VXLAN External Connectivity, on page 20 Restrictions for EVPN VXLAN External Connectivity • External connectivity with VPLS networks is supported only when bridging is the mode of interworking between the two domains. Integrated routing and bridging (IRB) is not supported between a BGP EVPN VXLAN fabric and a VPLS network. • External Connectivity with Layer 3 networks is supported only for IPv4 and IPv6 unicast traffic.
• The following EVPN VXLAN features are not supported on : • MPLS Layer 3 VPN Border Leaf Handoff • MPLS Layer 3 VPN Border Spine Handoff • VPLS over MPLS Border Leaf Handoff • VPLS over MPLS Border Spine Handoff • Interworking of Layer 3 TRM with MVPN Networks for IPv4 Traffic Information About EVPN VXLAN External Connectivity External connectivity allows the movement of Layer 2 and Layer 3 traffic between an EVPN VXLAN network and an external network. It also enables the EVPN VXLAN network to exchange routes with the externally connected network. Routes within an EVPN VXLAN network are already shared between all the VTEPs or leaf switches.
External connectivity uses the VTEPs on the periphery of the network to pass on these routes to an external Layer 2 or Layer 3 network. Similarly, the EVPN VXLAN network imports the reachability routes from the external network. External connectivity extends the Layer 2 or Layer 3 overlay network outside the VXLAN network. The process of extending a Layer 2 or Layer 3 network outside the EVPN VXLAN network is also known as handoff. Configuring EVPN VXLAN External Connectivity 1