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RE: RE: long distance gigabit ethernet

  • From: Bill St. Arnaud
  • Date: Fri Mar 22 12:02:07 2002

Good point. We operate 2 long haul native Gbe networks - one 350km the other 1500km

Tinming and jitter means that we have to do 3R regen with ethernet switches after every 3 hops

I suspect with native 10Gbe you will run into a lot of dispersion problems on long haul.

Bill

-----------------------------
Bill St. Arnaud
Senior Director Network Projects 
CANARIE Inc
www.canarie.ca/~bstarn

> -----Original Message-----
> From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> Frank Coluccio
> Sent: Friday, March 22, 2002 11:37 AM
> To: bill.st.arnaud@canarie.ca
> Cc: greg@band-x.com; nanog@merit.edu
> Subject: Re: RE: long distance gigabit ethernet
> 
> 
> 
> > 
> > Forget it [Gbe] with today's technology. All long haul 
> > systems use SONET framing. But with the 10Gbe standard 
> > WAN PHY you can directly connect into a SONET
> > transponder and your ethernet will be carried transparently.
> 
> 
> 
> Agreed, for the most part, especially when one is solely dependent on the 
> incumbent carriers. I should point out, however, that some 
> commercial enterprises 
> are leasing their own lambdas from dark fiber providers who are 
> running native 
> GbE  on their regional routes, both linear and ring-based, and 
> those nets are 
> becoming rather expansive. One such network that I am intimately 
> familiar with 
> now encompasses six northeastern states, and counting, adding 
> segment after 
> segment. Jitter on the larger ring circumferences? Yes, you 
> betcha. Compensated 
> for by either 3R regen or Layer 2 switching techniques or some 
> other opaque-
> inducing means. 
> 
> When such routes are actually available and justifiable, the 
> business problem 
> then centers on risk assessment. I.e., will those fiber carriers 
> continue to be 
> viable for the foreseeable future? And so it goes...
> 
> FAC
> 
> > 
> > -----------------------------
> > Bill St. Arnaud
> > Senior Director Network Projects
> > CANARIE Inc
> > www.canarie.ca/~bstarn
> > 
> > > -----Original Message-----
> > > From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> > > Greg Pendergrass
> > > Sent: Friday, March 22, 2002 10:36 AM
> > > To: 'Nanog@Merit. Edu'
> > > Subject: long distance gigabit ethernet
> > >
> > >
> > >
> > > I'm looking at long-haul gigabit ethernet as a possible 
> solution versus
> > > traditional SONET and I'm a little bit wary as promises made 
> on web pages
> > > and white papers aren't *always* completely accurate.  I'd
> > > appreciate it if
> > > you all would share your experiences with it. By long-haul I 
> mean in the
> > > hundreds or thousands of miles. I need to know:
> > >
> > > a. Does it work properly?
> > >
> > > b. Who offers it in the continental US?
> > >
> > > Please contact me off-list. Any information is greatly appreciated.
> > >
> > > Thanks in advance,
> > >
> > > Greg Pendergrass
> > >
> > >
> > 
> > 
> 
> 
> 





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