Port Control Protocol (PCP) Anycast Addresses, January 2016
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The Port Control Protocol (PCP) anycast addresses enable PCP clients to transmit signaling messages to their closest PCP-aware on-path NAT, firewall, or other middlebox without having to learn the IP address of that middlebox via some external channel. This document establishes one well-known IPv4 address and one well-known IPv6 address to be used as PCP anycast addresses.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 4844.