Propagating Explicit Congestion Notification Across IP Tunnel Headers Separated by a Shim

Document Type Replaced Internet-Draft (individual)
Author Bob Briscoe 
Last updated 2016-11-15
Replaces draft-briscoe-tsvwg-rfc6040bis
Replaced by draft-ietf-tsvwg-rfc6040update-shim
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


RFC 6040 on "Tunnelling of Explicit Congestion Notification" made the rules for propagation of ECN consistent for all forms of IP in IP tunnel. This specification extends the scope of RFC 6040 to include tunnels where two IP headers are separated by a shim header that cannot stand alone.


Bob Briscoe (

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