[mpls] Fwd: Last Call: <draft-ietf-mpls-entropy-lsp-ping-04.txt> (Label Switched Path (LSP) and Pseudowire (PW) Ping/Trace over MPLS Network using Entropy Labels (EL)) to Proposed Standard

Loa Andersson <loa@pi.nu> Fri, 12 August 2016 17:45 UTC

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Subject: [mpls] Fwd: Last Call: <draft-ietf-mpls-entropy-lsp-ping-04.txt> (Label Switched Path (LSP) and Pseudowire (PW) Ping/Trace over MPLS Network using Entropy Labels (EL)) to Proposed Standard
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Working Group,

There has been quite a bit of changes to this document during AD and
RTG Dir review of this document. The changes are editorial, but because
of volume it might be a good idea to look at the document a second time.

One of the co-authors characterized the the changes like this:
"No changes were made to the procedures or packet formats, but a
  number  of text changes were made to improve the language and overall
  readability. In addition, some of the sections were rearranged to
  improve the flow."

mpls wg co-chair

-------- Forwarded Message --------
Subject: Last Call: <draft-ietf-mpls-entropy-lsp-ping-04.txt> (Label 
Switched Path (LSP) and Pseudowire (PW) Ping/Trace over MPLS Network 
using Entropy Labels (EL)) to Proposed Standard
Resent-Date: Fri, 12 Aug 2016 08:35:51 -0700 (PDT)
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Resent-To: swallow.ietf@gmail.com, tsaad@cisco.com, 
n.leymann@telekom.de, loa@pi.nu
Date: Fri, 12 Aug 2016 08:35:51 -0700
From: The IESG <iesg-secretary@ietf.org>
Reply-To: ietf@ietf.org
To: IETF-Announce <ietf-announce@ietf.org>
CC: mpls@ietf.org, draft-ietf-mpls-entropy-lsp-ping@ietf.org, 
mpls-chairs@ietf.org, db3546@att.com, loa@pi.nu

The IESG has received a request from the Multiprotocol Label Switching WG
(mpls) to consider the following document:
- 'Label Switched Path (LSP) and Pseudowire (PW) Ping/Trace over MPLS
    Network using Entropy Labels (EL)'
   <draft-ietf-mpls-entropy-lsp-ping-04.txt> as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2016-08-26. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.


    Multiprotocol Label Switching (MPLS) Label Switched Path (LSP) Ping
    and Traceroute are methods used to test Equal-Cost Multipath (ECMP)
    paths.  Ping is known as a connectivity verification method and
    Traceroute as a fault isolation method, as described in RFC 4379.
    When an LSP is signaled using the Entropy Label (EL) described in RFC
    6790, the ability for LSP Ping and Traceroute operations to discover
    and exercise ECMP paths is lost for scenarios where LSRs apply
    different load balancing techniques.  One such scenario is when some
    LSRs apply EL-based load balancing while other LSRs apply non-EL
    based load balancing (e.g., IP).  Another scenario is when an EL-
    based LSP is stitched with another LSP which can be EL-based or non-
    EL based.

    This document extends the MPLS LSP Ping and Traceroute multipath
    mechanisms in RFC 6424 to allow the ability of exercising LSPs which
    make use of the EL.  This document updates RFC 4379, RFC 6424, and
    RFC 6790.

The file can be obtained via

IESG discussion can be tracked via

The following IPR Declarations may be related to this I-D:



Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64