Re: [OPSAWG] Last Call: <draft-ietf-opsawg-oam-overview-08.txt> (An Overview of Operations, Administration, and Maintenance (OAM) Mechanisms) to Informational RFC

["Romascanu, Dan (Dan)" <[e-mail]>]

This is a useful and well-written document and I support its publication. I have a few comments which I would be glad if they were addressed: 

1. I believe that the document must include reference to TRILL OAM, referencing draft-ietf-trill-oam-req-04 (which is close to approval) and including a section on TRILL OAM in the table in 1.4. 

2. The reference to Non-IETF documents in section 1.5 should mention the fact that non-IETF documents deal in many cases with OAM functions below the IP layer (layer 2, "2.5") and that operators use in some cases a multi-layered OAM approach function of the way their networks are architectured.

3. Section 1.5 mentions [IEEE802.1ag] under 'OAM mechanisms for Ethernet based networks'. In reality CFM as defined by IEEE 802.1ag is designed to apply for all bridged networks in IEEE 802, whatever the media protocol is being used. 

4. Together with .1ag I would recommend to also include in the table and list of references the CFM extensions defined in 802.1Qaw - Management of data-driven and data-dependent connectivity faults 

5. I am a little concerned of this document defining - once more - in sections 3.4.3.8 and 3.4.3.9 metrics and speak about measurement methods for Packet Loss and Packet Delay. I would prefer to refer to IPPM RFCs for this purpose

6. Section 1.1 mentions delay variation when describing the Delay Measurement (DM) function, but section 3.4.3.9 'forgets' it. I believe that delay variation is important and needs to be covered. 

Regards,

Dan
 


> -----Original Message-----
> From: [e-mail] [mailto:ietf-announce-
> [e-mail]] On Behalf Of The IESG
> Sent: Friday, January 11, 2013 9:36 PM
> To: IETF-Announce
> Cc: [e-mail]
> Subject: Last Call: <draft-ietf-opsawg-oam-overview-08.txt> (An Overview
> of Operations, Administration, and Maintenance (OAM) Mechanisms) to
> Informational RFC
> 
> 
> The IESG has received a request from the Operations and Management Area
> Working Group WG (opsawg) to consider the following document:
> - 'An Overview of Operations, Administration, and Maintenance (OAM)
>    Mechanisms'
>   <draft-ietf-opsawg-oam-overview-08.txt> as Informational RFC
> 
> 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
> [e-mail] mailing lists by 2013-01-25. Exceptionally, comments may
> be sent to [e-mail] instead. In either case, please retain the
> beginning of the Subject line to allow automated sorting.
> 
> Abstract
> 
> 
>    Operations, Administration, and Maintenance (OAM) is a general term
>    that refers to a toolset that can be used for fault detection and
>    isolation, and for performance measurement. OAM mechanisms have been
>    defined for various layers in the protocol stack, and are used with a
>    variety of protocols.
> 
>    This document presents an overview of the OAM mechanisms that have
>    been defined and are currently being defined by the IETF.
> 
> 
> 
> 
> The file can be obtained via
> http://datatracker.ietf.org/doc/draft-ietf-opsawg-oam-overview/
> 
> IESG discussion can be tracked via
> http://datatracker.ietf.org/doc/draft-ietf-opsawg-oam-overview/ballot/
> 
> 
> No IPR declarations have been submitted directly on this I-D.
>