IPv6 Neighbor Discovery Proxy

IPv6 Neighbor Discovery(ND) Proxy enables the hosts in different broadcast domains or VLANs to communicate with each other.

An IPv6 ND Proxy-enabled interface responds to a neighbor discovery request on behalf of a host connected to another interface. An ND proxy-configured egress interface modifies the source link-layer information of the packet with its own link-layer address and the MAC address in the Layer 2 header with its own MAC address. The presence of host neighbor cache entry in the neighbor entry table verifies the reachability state.

ND proxy uses ICMPv6 messages such as neighbor solicitation and neighbor advertisement to determine the link-layer address. Neighbor solicitation messages determine the link-layer address of a neighboring device by using the solicited-node multicast address of the target host. A Neighbor advertisement message is the unicast reply to a neighbor solicitation message.

IPv6 ND Proxy includes ND proxy and local ND proxy. ND proxy for IPv6 functions similarly to IPv4 proxy ARP. The RUCKUS implementation of IPv6 ND Proxy is based on RFC 4389.

Note: IPv6 ND Proxy is supported only on the router and is disabled by default.

In this section:

  1. IPv6 ND Proxy
    IPv6 ND Proxy enables the hosts in different broadcast domains with identical subnet masks to communicate with each other.
  2. Local ND Proxy
    Local ND proxy allows communication between hosts in different VLANs with identical subnet masks or hosts that are part of private or an isolated VLAN.
  3. Configuring IPv6 ND Proxy Globally
    IPv6 ND proxy in global configuration mode enables all the interfaces on the router.
  4. Configuring Local ND Proxy on an interface
    IPv6 ND Proxy can be used to configure individual interfaces on a router.
  5. Disabling IPv6 ND Proxy
    IPv6 ND Proxy can be disabled on an individual port or a range of ports.
Parent topic: IPv6 Addressing