Re: [bmwg] I-D ACTION:draft-ietf-bmwg-protection-term-05.txt

["Scott Poretsky" <sporetsky at allot.com>]

Hello BMWG-ers,

Here are the updates to the terminology document "Benchmarking
Terminology for Protection Performance".

1. Updated Introduction to have a separate Scope and General Model
sub-sections
2. Added comment differentiating a Failover Event from the IGP
Convergence Event 
3. Added comments that terms can apply for a backup tunnel that protects
multiple primary tunnels and methodologies can apply terms to perform
benchmarks with single or multiple flows
4. Updated Existing definitions section, including the note that terms
introduced in this document are capitalized when used in the Definition
and Discussion section of other terms.
5. Clarified definitions of terms "PLR" and "Headend".  This was the
number one issue of comment on the mailing list and in recent meetings.
Here are the new definitions.

   3.1.9. Point of Local Repair (PLR) 
         Definition: 
         A node capable of Failover along the Primary Path that is 
         also the ingress node for the Backup Path to protect another 
         node or link.

         Discussion: 
         Any node along the Primary Path from the ingress node to 
         the penultimate egress node MAY be a PLR.  The PLR MAY use 
         a single Backup Path for protecting one or more Primary 
         Paths.  There can be multiple PLRs along a Primary Path. 
         The PLR MUST be an ingress to a Backup Path.  The PLR can 
         be any node along the Primary Path except the egress node 
         of the Primary Path.  The PLR MAY simultaneously be a 
         Headend Node when it is serving the role as ingress to 
         the Primary Path and the Backup Path.  If the PLR is 
         also the Headend Node, then the Backup Path is a Disjoint 
         Path from the ingress to the Merge Node.  

   3.4.3.  Headend Node 
        Definition:  
        The ingress node of the Primary Path.  

        Discussion:      
        The Headend Node may also be a PLR when it is serving in 
        the dual role as the ingress to the Backup Path.     

6. Added clarification that Failover Time calculated with either the
Time-Based Loss Method (TBLM) or Timestamp-Based Method (TBM)
uses Equation 2 TBLM Failover Time = Time(Failover) - Time(Failover
Event), but TBLM obtains the time values from the Tester internal clock
and TBM obtains the time values from the timestamps in the packet
payloads.
7. Editorial changes including formatting and grammar 
8. Updated Author addresses and references

Thanks,
Author Team

-----Original Message-----
From: bmwg-bounces at ietf.org [mailto:bmwg-bounces at ietf.org] On Behalf Of
Internet-Drafts at ietf.org
Sent: Monday, November 03, 2008 7:00 PM
To: i-d-announce at ietf.org
Cc: bmwg at ietf.org
Subject: [bmwg] I-D ACTION:draft-ietf-bmwg-protection-term-05.txt

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

	Title		: Benchmarking Terminology for Protection
Performance
	Author(s)	: S. Poretsky
	Filename	: draft-ietf-bmwg-protection-term-05.txt
	Pages		: 28
	Date		: 2008-11-3
	
This document provides common terminology and metrics for benchmarking
  the performance of sub-IP layer protection mechanisms. The performance
  benchmarks are measured at the IP-Layer, avoiding dependence on
  specific sub-IP protection mechanisms. The benchmarks and terminology
  can be applied in methodology documents for different sub-IP layer
  protection mechanisms such as Automatic Protection Switching (APS),
  Virtual Router Redundancy Protocol (VRRP), Stateful High Availability
  (HA), and Multi-Protocol Label Switching Fast Reroute (MPLS-FRR).

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-bmwg-protection-term-05.t
xt

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

Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.
_______________________________________________
bmwg mailing list
bmwg at ietf.org
https://www.ietf.org/mailman/listinfo/bmwg