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Control Word Reserved bit for use in E-Tree

Document type: Expired Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2012-10-18 (latest revision 2012-04-16)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

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IESG State: Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


The extension described in this document allows a pair of PEs connected via an Ethernet Pseudowire (PW) to signal via the use of the Control Word (CW) whether the Ethernet frame encapsulated is coming from a Root AC or a Leaf AC. This allows a PE receiving this frame to decide whether it can be forwarded to a Leaf AC or not. Such forward or drop decision is an additional filtering action after the MAC-based forwarding decision. This applies to both P2P PW and P2MP PW.


Simon DeLord <>
Raymond Key <>
Frederic JOUNAY <>
Wim Henderickx <>
Lucy Yong <>
Lizhong Jin <>

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