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Re: [802.3BA] [HSSG] Reach Ad Hoc

I send out this question to the AMS-IX and Euro-IX customer base.
Got back some 25 responses (would have liked some more, but there
might be some more coming). Responses came from very different kind
of companies (internet exchanges, ISPs, metro providers, hosting
providers, university networks etc).

Of the 25 responses, 16 indeed indicated that the typical distance
for 10GE-LR use is less than 4 km. However the other 9 use 10GE-LR
typically on fiber lengths more than 4 km.

I will try to gather some more data on this and present at the next

  - Henk Steenman

On Dec 18, 2007, at 8:58 PM, Wertz, Jason S wrote:

> Is anyone officially consolidating SM fiber length data for a
> presentation at the January meeting?  If so, I have some data to
> contribute.
> Jason Wertz
> Sandia National Laboratories
> Albuquerque, NM 87185-0806
> (505) 284-9471
> -----Original Message-----
> From: Chris Cole [mailto:chris.cole@FINISAR.COM]
> Sent: Tuesday, December 11, 2007 5:22 PM
> Subject: Re: [HSSG] Reach Ad Hoc
> During the November HSSG meeting, optics vendors made a presentation
> proposing changing the 10km reach objective to 3km or 4km. One of my
> motivations for working on the proposal was informal input from a  
> number
> of 100GE end users that >90% of their data center and short  
> interconnect
> needs would be met by a reach objective less then 4km (versus 10km.)
> With such a reach distribution, a 4km or less optimized reach  
> objective
> would result in overall cost savings.
> As part of the HSSG effort to review this proposal, numerous requests,
> both informal as well as from the HSSG chair and Reach Ad Hoc chair,
> have been made for contributions to quantify the 10km and under reach
> distribution. While the optics vendors as suppliers can accurately
> represent the relative costs of optics alternatives, they can not
> represent end user requirements.
> To date, we have seen no end user presentation or data supporting
> changing the 10km reach objective to 4km or less. Unless such
> contributions are forthcoming, it is likely that there will be no
> motivation to make the change. This sentiment can be seen in the 12/7
> Reach Ad Hoc conference call minutes.
> I would encourage any HSSG participant that views their volume 100GE  
> needs as better met by a 4km or shorter reach objective to make a
> contribution containing reach distribution data in support of this
> position. Otherwise we will move forward with the existing approved
> objectives.
> Chris