[Pals] I-D Action: draft-ietf-pals-congcons-00.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
 This draft is a work item of the Pseudowire And LDP-enabled Services Working Group of the IETF.

        Title           : Pseudowire Congestion Considerations
        Authors         : Yaakov (Jonathan) Stein
                          David L. Black
                          Bob Briscoe
	Filename        : draft-ietf-pals-congcons-00.txt
	Pages           : 23
	Date            : 2015-09-02

Abstract:
   Pseudowires (PWs) have become a common mechanism for tunneling
   traffic, and may be found in unmanaged scenarios competing for
   network resources both with other PWs and with non-PW traffic, such
   as TCP/IP flows.  It is thus worthwhile specifying under what
   conditions such competition is acceptable, i.e., the PW traffic does
   not significantly harm other traffic or contribute more than it
   should to congestion.  We conclude that PWs transporting responsive
   traffic behave as desired without the need for additional mechanisms.
   For inelastic PWs (such as TDM PWs) we derive a bound under which
   such PWs consume no more network capacity than a TCP flow.  We also
   propose employing a transport circuit breaker that shuts down a TDM
   PW that persistently fails to comply with acceptable TDM service
   criteria.


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