Multiprotocol Label Switching (mpls)

hideki.endo.es | 1 Aug 2011 08:38

Comments on draft-ietf-mpls-tp-linear-protection

Hi Yaacov,

I put two comments in this list on draft-ietf-mpls-tp-linear-protection
as we discussed in Quebec.

1. PSC protocol version field
You should infom the reason why you have changed the protocol version
from 0 to 1 in the draft-08.
This is very important to implement PSC protocol.

2. Priorities of SF-P and FS
You said;
It is possible to give higher priority of FS than SF-P
in the next version of this draft.
It's because, in the current draft, it is impossible to keep selecting
a protection path securely, even in the case of SF on the protection path.

I think it's reasonalble.
However, due to this change, a race condition will bother us.
It's because an operator has to input the FS command to both ends of connection. 
You should explore the solution to avoid the race condition.

BR,
Hideki
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Adrian Farrel | 2 Aug 2011 11:31

Re: Comments on draft-ietf-mpls-tp-linear-protection

Hi Hideki,

I have no particular reason to support any protocol version number in the
document, but you said...

> You should infom the reason why you have changed the protocol version
> from 0 to 1 in the draft-08.
> This is very important to implement PSC protocol.

...and this made me curious,

Why is the value of the protocol version field in the final RFC so important?

Cheers,
Adrian

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Luyuan Fang (lufang | 2 Aug 2011 23:43

MPLS 2011 - October 16-19, Washington DC

Registration for MPLS 2011 (October 16-19, Omni Shoreham Hotel in Washington), the 14th annual International Conference on MPLS and related new technologies is now open at:

http://www.mpls2011.com/registration/attendees.htm

MPLS 2011 will include an extensive four day program consisting of tutorials, technical sessions, panels, and exhibits. The key topics to be discussed at this year's conference include: Scaling MPLS, Data Centers, MPLS

Transport Profile, Cloud Computing, Future Networks, Mobile Backhaul,

Resiliency, Network Management and Performance, Multi-layer and Optical Networks.

In addition, there will be two panel discussions on current topics.

The complete program is available at:

http://www.mpls2011.com/program/technical_sessions.htm

The event will be followed by a Public Interop demonstration. There will also be an exhibit floor,

where leading network equipment vendors will showcase their new offerings,

the list of current sponsors is available at:

http://www.mpls2011.com/sponsors/sponsors.htm

The conference hotel is the Omni Shoreham Hotel in Washington DC.

Please note that there are only a limited number of rooms available this year

at a reduced rate.

Please make reservations at: http://www.mpls2011.com/hotel.htm

Looking forward to seeing you at MPLS 2011!

Luyuan

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The IESG | 3 Aug 2011 20:43

Protocol Action: 'Packet Loss and Delay Measurement for MPLS Networks' to Proposed Standard (draft-ietf-mpls-loss-delay-04.txt)

The IESG has approved the following document:
- 'Packet Loss and Delay Measurement for MPLS Networks'
  (draft-ietf-mpls-loss-delay-04.txt) as a Proposed Standard

This document is the product of the Multiprotocol Label Switching Working
Group.

The IESG contact persons are Adrian Farrel and Stewart Bryant.

A URL of this Internet Draft is:
http://datatracker.ietf.org/doc/draft-ietf-mpls-loss-delay/

Technical Summary

   The ability to measure and monitor one and two-way packet loss and delay 
   performance is a basic need of service providers delivering SLAs. These
   metrics are also realted to delay variation and channel throughput.

   This measurement capability also provides greater visibility for operators
   into the performance characteristics of their networks, thereby facilitating
   planning, troubleshooting, and evaluation.  This document specifies
   protocol mechanisms to enable the efficient and accurate measurement of
   these performance metrics in MPLS networks.

   This document specifies two closely-related protocols, one for packet
   loss measurement (LM), and one for packet delay measurement (DM).

Working Group Summary

   This document is an MPLS working group document. It is not part of the 
   MPLS-TP project, however the companion functionality for MPLS-based 
   Transport Networks makes reference to this document by defining a profile.
   The working group has reviewed this document with this fact in mind.

Document Quality

   The document is well reviewed in the MPLS working group 

Personnel

   Loa Andersson (loa <at> pi.nu) is the Document Shepherd
   Adrian Farrel (adrian <at> olddog.co.uk) is the Responsible AD
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The IESG | 3 Aug 2011 20:45

Document Action: 'A Packet Loss and Delay Measurement Profile for MPLS-based Transport Networks' to Informational RFC (draft-ietf-mpls-tp-loss-delay-profile-04.txt)

The IESG has approved the following document:
- 'A Packet Loss and Delay Measurement Profile for MPLS-based Transport
   Networks'
  (draft-ietf-mpls-tp-loss-delay-profile-04.txt) as an Informational RFC

This document is the product of the Multiprotocol Label Switching Working
Group.

The IESG contact persons are Adrian Farrel and Stewart Bryant.

A URL of this Internet Draft is:
http://datatracker.ietf.org/doc/draft-ietf-mpls-tp-loss-delay-profile/

Technical Summary

   Procedures and protocol mechanisms to enable the efficient and
   accurate measurement of packet loss, delay, and throughput in MPLS
   networks are defined draft-ietf-mpls-loss-delay.

   The MPLS Transport Profile (MPLS-TP) is the set of MPLS protocol
   functions applicable to the construction and operation of packet-
   switched transport networks.

   This document describes a profile of the general MPLS loss, delay,
   and throughput measurement techniques that suffices to meet the
   specific requirements of MPLS-TP.

Working Group Summary

   This document is a MPLS working group document, and part of the
   MPLS-TP project. Meaning that it has been reviewed by ITU-T SG15 
   as part of the working group last call process.

Document Quality

  The document is well reviewed in the MPLS working group and SG15. 

Personnel

   Loa Andersson (loa <at> pi.nu) is the Document Shepherd
   Adrian Farrel (adrian <at> olddog.co.uk) is the Responsible AD
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internet-drafts | 4 Aug 2011 06:11

I-D Action: draft-ietf-mpls-tp-linear-protection-09.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item
of the Multiprotocol Label Switching Working Group of the IETF.

	Title           : MPLS-TP Linear Protection
	Author(s)       : Stewart Bryant
                          Eric Osborne
                          Nurit Sprecher
                          Annamaria Fulignoli
                          Yaacov Weingarten
	Filename        : draft-ietf-mpls-tp-linear-protection-09.txt
	Pages           : 42
	Date            : 2011-08-03

   The Transport Profile for Multiprotocol Label Switching (MPLS-TP) is
   being specified jointly by IETF and ITU-T.  This document addresses
   the functionality described in the MPLS-TP Survivability Framework
   document [SurvivFwk] and defines a protocol that may be used to
   fulfill the function of the Protection State Coordination for linear
   protection, as described in that document.

   This document is a product of a joint Internet Engineering Task Force
   (IETF) / International Telecommunications Union Telecommunications
   Standardization Sector (ITU-T) effort to include an MPLS Transport
   Profile within the IETF MPLS and PWE3 architectures to support the
   capabilities and functionalities of a packet transport network as
   defined by the ITU-T.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-mpls-tp-linear-protection-09.txt

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ietf-mpls-tp-linear-protection-09.txt
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internet-drafts | 4 Aug 2011 16:22

I-D Action: draft-ietf-mpls-ldp-p2mp-15.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item
of the Multiprotocol Label Switching Working Group of the IETF.

	Title           : Label Distribution Protocol Extensions for Point-to-Multipoint and
Multipoint-to-Multipoint Label Switched Paths
	Author(s)       : Ina Minei
                          IJsbrand Wijnands
                          Kireeti Kompella
                          Bob Thomas
	Filename        : draft-ietf-mpls-ldp-p2mp-15.txt
	Pages           : 39
	Date            : 2011-08-04

   This document describes extensions to the Label Distribution Protocol
   for the setup of Point-to-Multipoint and Multipoint-to-Multipoint
   Label Switched Paths in Multi-Protocol Label Switching networks.
   These extensions are also referred to as Multipoint LDP.  Multipoint
   LDP constructs the P2MP or MP2MP Label Switched Paths without
   interacting with or relying upon any other multicast tree
   construction protocol.  Protocol elements and procedures for this
   solution are described for building such Label Switched Paths in a
   receiver-initiated manner.  There can be various applications for
   Multipoint Label Switched Paths, for example IP multicast or support
   for multicast in BGP/MPLS L3VPNs.  Specification of how such
   applications can use a LDP signaled Multipoint Label Switched Path is
   outside the scope of this document.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-mpls-ldp-p2mp-15.txt

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ietf-mpls-ldp-p2mp-15.txt
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The IESG | 4 Aug 2011 20:43

Protocol Action: 'Label Distribution Protocol Extensions for Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths' to Proposed Standard (draft-ietf-mpls-ldp-p2mp-15.txt)

The IESG has approved the following document:
- 'Label Distribution Protocol Extensions for Point-to-Multipoint and
Multipoint-to-Multipoint Label Switched Paths'
(draft-ietf-mpls-ldp-p2mp-15.txt) as a Proposed Standard

This document is the product of the Multiprotocol Label Switching Working
Group.

The IESG contact persons are Adrian Farrel and Stewart Bryant.

A URL of this Internet Draft is:
http://datatracker.ietf.org/doc/draft-ietf-mpls-ldp-p2mp/

Technical Summary

This document specifies extensions to the Label Distribution Protocol
(LDP) for the setup of point-to-multipoint (P2MP) and multipoint-to-
multipoint (MP2MP) Label Switched Paths (LSPs) in Multi-Protocol
Label Switching (MPLS) networks. LDP with these extensions is also
referred to as Multipoint LDP (mLDP).

Runing mLDP will result in establishing P2MP or MP2MP LSPs
without interacting with or relying upon any other multicast tree
construction protocol. Protocol elements and procedures for this
solution are described for building such LSPs in a receiver-initiated
manner. There can be several applications for P2MP/MP2MP LSPs,
but these are outside the scope of this document.

Working Group Summary

The document has been reviewed by the MPLS working group.
There is no controversy and consensus seems good.

Document Quality

All major MPLS vendors have either already implements or have
indicated intention to implement.

Personnel

Loa Andersson (loa <at> li.nu) is the Document Shepherd.
Adrian Farrel (adrian <at> olddog.co.uk) is the Responsible AD

RFC Editor Note

Section 1.1
Please add the following new paragraph to the end of the section.

All new fields shown as "reserved" in this document MUST be set to zero on transmission and MUST be ignored on receipt.

---

Section 1.2
Add to the list.

FEC: Forwarding Equivalence Class

---

Section 1.2 (CRC entry)

s/V.42/V.42 [ITU.V42.1994]/

---

NEW
1.3. Manageability

MPLS LSRs can be modeled and managed using the MIB module defined in
[RFC3813]. That MIB module is fully capable of handling the one-to-
many in-segment to out-segment relationships needed to support P2MP
LSPs, and no further changes are required.

[RFC3815] defines managed objects for LDP. The MIB module allows the
modeling and management of LDP and LDP speakers for the protocol as
defined in [RFC5036]. The protocol extensions defined in this
document to support P2MP in LDP may require an additional MIB module
or extensions to the modules defined in [RFC3815]. This is for future
study, and at the time of writing no interest had been expressed in
this work.

Future manageability work should pay attention to the protocol
extensions defined in this document, and specifically the
configurable and variable elements, along with reoprting the new
protocol fields that identify individual P2MP LSPs.
END

---

Section 5.2.2
s/RFC3036/[RFC5056]

---

Section 10
s/configure/configured

---

Section 14.2
Add to the start...

[RFC3813] Srinivansan, C., Viswanathan, A., and T. Nadeau,
"Multiprotocol Label Switching (MPLS) Label Switching
Router (LSR) Management Information Base (MIB)", RFC
3813, June 2004

[RFC3815] Cucchiara, J., Sjostrand, H., and Luciani, J.,
"Definitions of Managed Objects for the Multiprotocol
Label Switching (MPLS) Label Distribution Protocol (LDP)",
RFC 3815, June 2004.
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hideki.endo.es | 5 Aug 2011 06:47

Re: Comments on draft-ietf-mpls-tp-linear-protection

Hi Adrian,

I'm very sorry for my late response.

You are right.
A protocol version number normally doesn't matter in final RFC,
because previous version number is put away and the latest version is available.

However, I heard from Yaacov that
not only version number '1' but also '0' was availble in this draft.
The version '0' is to use ACH TLVs.
The version '1' is to use Optional TLVs which will be defined for the future.

Unfortunately, I think this solution has big fault as a protocol.
Because the version number is following ACH TLVs,
it is impossible to determine whether there are ACH TLVs or Optional TLVs in a packet.

I'd like to advertise the fact in WG.

BR,
Hideki

>Hi Hideki,
>
>I have no particular reason to support any protocol version number in the
>document, but you said...
>
>> You should infom the reason why you have changed the protocol version
>> from 0 to 1 in the draft-08.
>> This is very important to implement PSC protocol.
>
>...and this made me curious,
>
>Why is the value of the protocol version field in the final RFC so important?
>
>Cheers,
>Adrian
>
>
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internet-drafts | 5 Aug 2011 09:48

I-D Action: draft-ietf-mpls-tp-mib-management-overview-05.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item
of the Multiprotocol Label Switching Working Group of the IETF.

	Title           : Multiprotocol Label Switching Transport Profile (MPLS-TP) MIB-based Management Overview
	Author(s)       : Daniel King
                          Venkatesan Mahalingam
	Filename        : draft-ietf-mpls-tp-mib-management-overview-05.txt
	Pages           : 27
	Date            : 2011-08-05

   A range of Management Information Base (MIB) modules has been
   developed to help model and manage the various aspects of
   Multiprotocol Label Switching (MPLS) networks.  These MIB modules are
   defined in separate documents that focus on the specific areas of
   responsibility of the modules that they describe.

   The MPLS Transport Profile (MPLS-TP) is a profile of MPLS
   functionality specific to the construction of packet-switched
   transport networks.

   This document describes the MIB-based architecture for MPLS-TP,
   and indicates the interrelationships between different existing MIB
   modules that can be leveraged for MPLS-TP network management and
   identifies areas where additional MIB modules are required.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-mpls-tp-mib-management-overview-05.txt

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ietf-mpls-tp-mib-management-overview-05.txt
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