Lightweight Emergency Alerting Protocol (LEAP)

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Last updated 2012-05-03 (latest revision 2011-10-31)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Emergency alerts need to be delivered reliably from one source to many recipients at once. TCP is unsuitable for this style of delivery, because the large number of acknowledgements would likely cause network congestion. This document defines a UDP-based protocol for delivering alerts that supports fragmentation and retransmission for reliability, and allows the sender of a datagram to control whether acknowledgements are sent. Please send feedback to the mailing list.


Richard Barnes (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)