May be you can educate me on ipv4 arp versus ipv6 neighbor discovery. In ipv4 world, when you ping a device (and it is not in the arp cache, it will broadcast it to all devices on the same VLAN. Now, with ipv6, ther is no arp, so it will use the ND mechanism with multicast. So let say I have 4 devices on my VLAN. One of the device is looking for a MAC address (through the ping mechanism). So if there is no broadcast, how does it reach other devices on the VLAN?