API Guide

• On VTEPs 3 and 4, access ports are assigned to the virtual network using a port-scoped VLAN. The EVPN instance for the overlay
VXLAN is configured using manual configuration mode. The RD and RT are configured using auto mode.
• On all VTEPs, symmetric IRB is configured in EVPN mode using a unique, dedicated VXLAN VNI and EVPN RD and RT values for each
tenant VRF.
• The VLAN to an external network is configured only on VTEPs 3 and 4 in the VLT domain that serves as the border leaf gateway.
NOTE: In asymmetric IRB, you must configure all destination virtual-network subnets on each VTEP. Symmetric IRB
simplifies the VXLAN intersubnet configuration by reducing the number of required VNI configurations. In this example,
VLT domain 1 requires only VNI subnet 10.1.0.0/16; VLT domain 2 requires only VNI subnet 10.2.0.0/16. Symmetric IRB
facilitates the scaling of VXLAN virtual networks.
120 BGP EVPN for VXLAN