Neighbour Discovery (ND) Proxy
The ND proxy feature provides support for proxying the IPv6 ND protocol to allow the forwarding of ICMP messages between upstream and downstream interfaces.
ND proxy uses ICMPv6 messages such as Neighbor Solicitation (NS) and Neighbor Advertisement (NA). The ND proxy enabled interface unicasts an NS message on behalf of a host to a wireless client. The interface modifies the packet to include the wireless client MAC address only; the wireless client responds with a unicast NA message to that host.
The implementation of ND proxy is based on RFC 4389.