Hi,

One question about the difference of the encapsulation modes between CV and 
Route Tracing.

In Section 3, there are three encapsulation modes for on-demand CV: "LSP-Ping 
with IP encapsulation", "On-demand CV with IP encapsulation, over ACH" and 
"Non-IP based On-demand CV, using ACH", but for On-demand Route Tracing (in 
section 4), there are only two modes: "On-demand LSP Route Tracing with IP 
encapsulation" and "Non-IP based On-demand LSP Route Tracing, using ACH". Seems 
that there should be "On-demand LSP Route Tracing with IP encapsulation, over 
ACH" accordingly. What's reason behind this? Or maybe I missed something.

Best regards,
Mach

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of The
> IESG
> Sent: Thursday, August 11, 2011 9:46 PM
> To: IETF-Announce
> Cc: [email protected]
> Subject: [mpls] Last Call: <draft-ietf-mpls-tp-on-demand-cv-06.txt> (MPLS
> On-demand Connectivity Verification and Route Tracing) to Proposed Standard
> 
> 
> The IESG has received a request from the Multiprotocol Label Switching WG
> (mpls) to consider the following document:
> - 'MPLS On-demand Connectivity Verification and Route Tracing'
>   <draft-ietf-mpls-tp-on-demand-cv-06.txt> as a 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
> [email protected] mailing lists by 2011-08-25. Exceptionally, comments may be
> sent to [email protected] instead. In either case, please retain the
> beginning of the Subject line to allow automated sorting.
> 
> Abstract
> 
>    Label Switched Path Ping (LSP-Ping) is an existing and widely
>    deployed Operations, Administration and Maintenance (OAM) mechanism
>    for Multi-Protocol Label Switching (MPLS) Label Switched Paths
>    (LSPs).  This document describes extensions to LSP-Ping so that LSP-
>    Ping can be used for On-demand Connectivity Verification of MPLS
>    Transport Profile (MPLS-TP) LSPs and Pseudowires.  This document also
>    clarifies procedures to be used for processing the related OAM
>    packets.  Further, it describes procedures for using LSP-Ping to
>    perform Connectivity Verification and Route Tracing functions in
>    MPLS-TP networks.  Finally this document updates RFC 4379 by adding a
>    new address type and requesting an IANA registry.
> 
> 
> The file can be obtained via
> http://datatracker.ietf.org/doc/draft-ietf-mpls-tp-on-demand-cv/
> 
> IESG discussion can be tracked via
> http://datatracker.ietf.org/doc/draft-ietf-mpls-tp-on-demand-cv/
> 
> 
> No IPR declarations have been submitted directly on this I-D.
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