[46250] in North American Network Operators' Group
RE: RE: long distance gigabit ethernet
daemon@ATHENA.MIT.EDU (Bill St. Arnaud)
Fri Mar 22 12:00:31 2002
Reply-To: <bill.st.arnaud@canarie.ca>
From: "Bill St. Arnaud" <bill.st.arnaud@canarie.ca>
To: "Frank Coluccio" <fcoluccio@dticonsulting.com>
Cc: <greg@band-x.com>, <nanog@merit.edu>
Date: Fri, 22 Mar 2002 11:57:55 -0500
Message-ID: <KEENLGPGBNINDMKICGJHCEDIFPAA.bill.st.arnaud@canarie.ca>
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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=20
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
>=20
>=20
>=20
> >=20
> > Forget it [Gbe] with today's technology. All long haul=20
> > systems use SONET framing. But with the 10Gbe standard=20
> > WAN PHY you can directly connect into a SONET
> > transponder and your ethernet will be carried transparently.
>=20
>=20
>=20
> Agreed, for the most part, especially when one is solely dependent on =
the=20
> incumbent carriers. I should point out, however, that some=20
> commercial enterprises=20
> are leasing their own lambdas from dark fiber providers who are=20
> running native=20
> GbE on their regional routes, both linear and ring-based, and=20
> those nets are=20
> becoming rather expansive. One such network that I am intimately=20
> familiar with=20
> now encompasses six northeastern states, and counting, adding=20
> segment after=20
> segment. Jitter on the larger ring circumferences? Yes, you=20
> betcha. Compensated=20
> for by either 3R regen or Layer 2 switching techniques or some=20
> other opaque-
> inducing means.=20
>=20
> When such routes are actually available and justifiable, the=20
> business problem=20
> then centers on risk assessment. I.e., will those fiber carriers=20
> continue to be=20
> viable for the foreseeable future? And so it goes...
>=20
> FAC
>=20
> >=20
> > -----------------------------
> > Bill St. Arnaud
> > Senior Director Network Projects
> > CANARIE Inc
> > www.canarie.ca/~bstarn
> >=20
> > > -----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=20
> solution versus
> > > traditional SONET and I'm a little bit wary as promises made=20
> 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=20
> 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
> > >
> > >
> >=20
> >=20
>=20
>=20
>=20
