Pseudowire (PW) Control Word (CW) Stitching

Document Type Expired Internet-Draft (individual)
Authors Italo Busi  , Stewart Bryant  , Andy Malis  , Jie Dong 
Last updated 2019-04-25 (latest revision 2018-10-22)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines the behavior of a new type of Multi-Segment Pseudowire (MS-PW) Switching PE (S-PE) which enhances the S-PE functions defined in [RFC 6073], with the capability to switch an Ethernet pseudowire (PW) segment that uses the PW Control Word (CW) [RFC 4385] with an Ethernet PW segment that does not use the CW. This new type of S-PE can be deployed in the network one hop away, at the MPLS layer, from a Terminating PE (T-PE) which does not support CW for Ethernet PW encapsulation [RFC 4448]. In this way, all the Ethernet PW packets sent though the MPLS network will have the CW and be protected against incorrect equal-cost-multi-path (ECMP) behavior as described in [I-D ETH-CW].


Italo Busi (
Stewart Bryant (
Andy Malis (
Jie Dong (

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