The routing software and hardware routes IPv6 traffic between router interfaces. A router interface is either a virtual LAN (VLAN) that has an IP address assigned to it, or a Layer 3 tunnel.
As you create VLANs and tunnels with IP addresses, you can also choose to route (forward traffic) between them. Both the VLAN switching and IP routing function occur within the switch.
IPv4 and IPv6 interfaces can coexist on the same VLAN, allowing both IPv4 and IPv6 networks to coexist on the same Layer 2 broadcast domain.
Note
Each IP address and mask assigned to a VLAN must represent a unique IP subnet. You cannot configure the same IP address and subnet on different VLANs within the same virtual router.