Local Peer Discovery
The Local Peer Discovery protocol, specified as BEP-14, is an extension to the BitTorrent file-distribution system. It is designed to support the discovery of local BitTorrent peers, aiming to minimize the traffic through the Internet service provider's channel and maximize use of higher-bandwidth local area network.
Local Peer Discovery is implemented with HTTP-like messages on User Datagram Protocol multicast group 239.192.152.143:6771 or ff15::efc0:988f which are administratively scoped multicast addresses. Since implementation is simple, Local Peer Discovery is implemented in several clients. An alternative multicast peer discovery protocol is published as , but is not widely adopted since it is considered too complex in comparison.
