Concept Guide

Physical Loopback for VXLAN RIOT
The following topology shows how VXLAN RIOT can be achieved using physical loopbacks. Two port-channels, vxlan and non-vxlan
loopback port-channel, are created in the device. Interface connected at one end of the physical loopback cable is/are added as member of
the non-vxlan loopback port-channel (P2/P6) and other end interfaces as a member of vxlan loopback port-channel (P3/P7).
In this RIOT scheme, whenever R1 tries to reach R2, the packet gets to P1 on VTEP 1 with VLAN 10 and gets routed out of P2 on VLAN
20. VTEP 1 sends an ARP request for R2 (10.1.2.1) through P2. This request gets VXLAN encapsulated at P3 and is sent out of P4.
Eventually, the native ARP request reaches R2.
R2 sends an ARP response that is VXLAN encapsulated at VTEP 2. This response reaches VTEP 1 on P4 with a VXLAN encapsulation. At
this point, the ARP response is de-capsulated at P4. The native ARP response egresses through P3 and re-enters through P2. The ARP is
then resolved pointing to P2.
After this ARP discovery is complete, the existing routing and VXLAN encapsulation mechanisms facilitate routing over VXLAN tunnels
between R1 and R2.
NOTE
: VXLAN feature is not supported in a stacking environment
1162 Virtual Extensible LAN (VXLAN)