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