Objectives
The simulator ticks each one as soon as the network meets it.
On L1 and L2, set nve with source-interface loopback1.
Create virtual-network 10 with vxlan-vni 10010, and bind VLAN 10 to it.
Under evpn, turn on auto-evi.
show ip bgp l2vpn evpn on L1: the type-3 route of 10.10.10.2 is there.
Ping PC2 (192.168.10.20) from PC1.
Before you start
Each leaf has its own ASN, so its automatic route-target differs. In this model, as with Dell’s disable-rt-asn option, automatic route-targets match on the VNI. Compare show nve remote-vtep here with the static lab: the peer is now learned from EVPN.
Concept
BGP EVPN: a control plane for VXLAN
BGP EVPN replaces flood-and-learn with BGP routes in the L2VPN EVPN address family. Each VTEP advertises an inclusive-multicast route (type 3) per VNI, so the others know to replicate to it, and a MAC route (type 2) per local host, so remote MACs are known before any traffic flows. A spine is usually the iBGP route reflector.
Concept
A leaf-spine fabric on Dell switches
Every leaf connects to every spine, and no leaf connects to another leaf, so any two leaves are two hops apart over several equal paths. eBGP routes between loopbacks form the underlay, usually with one ASN per leaf pair. EVPN then runs on the same BGP sessions: VTEPs announce their VNIs and hosts, and tunnels form from those routes. SONiC can peer without link addresses: ipv6 enable and neighbor interface are enough.
