The Subnetwork Encapsulation and Adaptation Layer (SEAL)

Document Type Expired Internet-Draft (individual)
Author Fred Templin 
Last updated 2015-10-14 (latest revision 2014-01-03)
Stream Independent Submission
Intended RFC status Experimental
Expired & archived
pdf htmlized bibtex
Stream ISE state In ISE Review
Consensus Boilerplate Unknown
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IESG IESG state Expired (IESG: Dead)
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Telechat date
Responsible AD Ralph Droms
IESG note Joe Touch ( is the document shepherd.
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a Subnetwork Encapsulation and Adaptation Layer (SEAL). SEAL operates over virtual topologies configured over connected IP network routing regions bounded by encapsulating border nodes. These virtual topologies are manifested by tunnels that may span multiple IP and/or sub-IP layer forwarding hops, where they may incur packet duplication, packet reordering, source address spoofing and traversal of links with diverse Maximum Transmission Units (MTUs). SEAL addresses these issues through the encapsulation and messaging mechanisms specified in this document.


Fred Templin (

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