In VXLAN, all the learning about the virtual machine MAC address and its association with VTEP IP address is performed through the support of physical network. Cloud Foundation on VxRail uses IP multicast by default to populate the forwarding tables in the VTEP.
- Assign a unique IP address range is assigned as the multicast IP address group in the range of 184.108.40.206 to 220.127.116.11. Each address in this range designates a multicast group.
- Do not use multicast addresses ranging from 18.104.22.168 to 22.214.171.124. These are reserved for routing protocols and other low-level topology discovery or maintenance protocols.
- Use administratively scoped addresses from 126.96.36.199 to 188.8.131.52 if the VXLAN deployment is within a company. This multicast address range is viewed as a private multicast domain.
- If VXLAN networks will be shared between administrative domains, the addresses should be assigned from the 184.108.40.206/8 (220.127.116.11-18.104.22.168) block.