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 of the IETF.
Title : Pseudowire Congestion Considerations
Authors : Yaakov (Jonathan) Stein
David L. Black
Bob Briscoe
Filename : draft-ietf-pals-congcons-02.txt
Pages : 25
Date : 2016-04-21
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. For TDM
PWs, we find that the level of congestion at which the PW can no
longer deliver acceptable TDM service is never significantly greater,
and typically much lower, than this bound. Therefore, as long as the
PW is shut down when it can no longer deliver acceptable TDM service,
it will never do significantly more harm than even a single TCP flow.
If the TDM service does not automatically shut down, a mechanism to
block persistently unacceptable TDM pseudowires is required.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-pals-congcons/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-pals-congcons-02
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-pals-congcons-02
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