Editing Address Resolution Protocol (section)

==ARP mediation==
'''ARP mediation''' refers to the process of resolving Layer-2 addresses through a [[virtual private wire service]] (VPWS) when different resolution protocols are used on the connected circuits, e.g., [[Ethernet]] on one end and [[Frame Relay]] on the other.  In [[IPv4]], each [[provider edge]] (PE) device discovers the IP address of the locally attached [[customer edge]] (CE) device and distributes that IP address to the corresponding remote PE device.  Then each PE device responds to local ARP requests using the IP address of the remote CE device and the hardware address of the local PE device.  In [[IPv6]], each PE device discovers the IP address of both local and remote CE devices and then intercepts local [[Neighbor Discovery]] (ND) and [[Inverse Neighbor Discovery]] (IND) packets and forwards them to the remote PE device.<ref>{{cite IETF | rfc = 6575 | author = Shah, H. | title = Address Resolution Protocol (ARP) Mediation for IP Interworking of Layer 2 VPNs | publisher = Internet Engineering Task Force | date = June 2012 | display-authors = etal}}</ref>