Re: [bmwg] Comment on meth-18.

["Kris Michielsen" <kmichiel at cisco.com>]

John,

Thanks for reviewing the draft!

What do you think of the following suggestion?
OLD:
For Convergence Events caused by the Tester, such as an IGP cost change, the Tester may start to drop all traffic received from the
Preferred Egress Interface at the Convergence Event Instant to achieve the same result.

NEW:
For Convergence Events caused by the Tester, such as an IGP cost change, the Tester may start to discard all traffic received from
the Preferred Egress Interface at the Convergence Event Instant, or may be able to separately observe packets received from the
Preferred Egress Interface prior to the Convergence Event Instant, to achieve the same result.

Thanks,
Kris

> -----Original Message-----
> From: bmwg-bounces at ietf.org [mailto:bmwg-bounces at ietf.org] On 
> Behalf Of McLendon, John
> Sent: 16 July 2009 00:00
> To: Al Morton; bmwg at ietf.org
> Subject: [bmwg] Comment on meth-18.
> 
> Hi all,
> I have a comment on the following statement in Sec 4, top of pp. 9, in
> meth-18:
> 
> "For Convergence Events caused by the Tester, such as an IGP 
> cost change, the Tester may start to drop all traffic 
> received from the Preferred Egress Interface at the 
> Convergence Event Instant to achieve the same result."
> 
> The word "drop" implies that the test device forwards or 
> drops traffic.
> In my experience, test devices neither forward or drop 
> traffic. They may generate or analyze traffic, but a test 
> device dropping traffic doesn't seem helpful to the desired 
> measurement. Many test devices can bring a link down at the 
> physical layer.
> 
> J...
> 
> 
> 
> -----Original Message-----
> From: bmwg-bounces at ietf.org [mailto:bmwg-bounces at ietf.org] On 
> Behalf Of Al Morton
> Sent: Wednesday, July 15, 2009 3:48 PM
> To: bmwg at ietf.org
> Subject: Re: [bmwg] WGLC: draft-ietf-bmwg-igp-dataplane drafts
> 
> Comments on meth-18, all nits,
> Al (mostly as participant)
> 
> At 01:44 PM 7/14/2009, Al Morton wrote:
> >...This message begins a Last call on the IGP-Dataplane Convergence 
> >Time Benchmarking drafts.
> >
> >http://tools.ietf.org/html/draft-ietf-bmwg-igp-dataplane-conv-term-18
> >http://tools.ietf.org/html/draft-ietf-bmwg-igp-dataplane-conv-meth-18
> >http://tools.ietf.org/html/draft-ietf-bmwg-igp-dataplane-conv-app-17
> >
> >The Last Call will end on July 31, 2009.
> 
> 
> Section 4, top of page 10,
> s/At least one condition need to /At least one condition needs to /
> 
> 
> 5.7.  Measurement Accuracy
> ...  When packet jitter is much less than the convergence
>     time, it is a negligible source of error and therefor it 
> will be s/therefor/therefore/
> 
> 5.9 Tester Capabilities
> Add "Also see section 6 for method-specific capabilities."
> 
> 6.1.3.  Measurement Accuracy
> 
>     TBD
> (can't leave this TBD, if there's no obvious material, delete 
> section ?)
> 
> 
> Section 7, Reporting Format
> 
>          Maximum Packet Delay Threshold      seconds
> this is called "Forwarding Delay Threshold" in the term doc, right?
> pick one for both...
> 
> Section 9, same as terms, use the standard BMWG paragraphs...
> 
> 
>     
> 
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