Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

RE: long distance gigabit ethernet

  • From: LeBlanc, Jason
  • Date: Mon Mar 25 17:50:03 2002

The new 15540 is a much better box, not much more $ either.  There are some
other people making extremely killer products, ONI being one that is very
popular.  I wouldn't invest in a 15454 anymore with all the new products out
there, we still use them, but anything new will be a better box.

> -----Original Message-----
> From: Barton F Bruce [mailto:barton@cent.net]
> Sent: Friday, March 22, 2002 5:17 PM
> To: Antony; Greg Pendergrass
> Cc: Richard A Steenbergen; 'Nanog@Merit. Edu'
> Subject: Re: long distance gigabit ethernet
> 
> 
> 
> The Cerent 454 (now cisco 15454) has 2 port Gig-E cards that 
> cost a little
> more than a PA-GE card. The pair of ports shares OC-12 
> available to that
> slot (I'm assuming this is NOT an OC-192 equipped shelf) and 
> the bandwidth
> can be split in certain multiples of STSes (OC-1), or used 
> totally for one
> port. You only need as many STSes between boxes as you want to use.
> 
> You can play some nice games with 802.1Q VLANs and multiple 
> sites, too.
> 
> There is a newer 4 port Cerent gig-E card I have not seen, 
> but that probably
> can do a FULL gig-E on at least 2 of the ports (i.e. use a 
> full OC-48 if the
> box has the OC-192 cross connect matrix installed). This 
> newer card I think
> is only for point to point and does not "understand" VLANS, 
> though probably
> can carry them.
> 
> Some DWDM boxes have their own gig-E ports. We have Sycamore 
> ones that give
> us several Boston, NYC, and Reston routers on the same ethernet.
> Consider also that many switches support what cisco calls 
> ether-channel. If
> one gig-E isn't enough, add more in parallel. Any router on 
> this "ethernet"
> can freely talk to any other.
> 
> You are not stuck with just one router talking to one at the 
> other end.
> 
> ----- Original Message -----
> From: "Antony" <antony@phenome.org>
> To: "Greg Pendergrass" <greg@band-x.com>
> Cc: "Richard A Steenbergen" <ras@e-gerbil.net>; "'Nanog@Merit. Edu'"
> <nanog@merit.edu>
> Sent: Friday, March 22, 2002 12:28 PM
> Subject: Re: long distance gigabit ethernet
> 
> 
> >
> > On Fri, Mar 22, 2002 at 11:54:05AM -0500, Greg Pendergrass wrote:
> > >
> > > I'm going to take a stab and assume that you're actually 
> more interested
> > > in finding a longhaul line with GigE on the ends, and not 
> so much how
> many
> > > miles you can get with whatever optics...
> > >
> > > Absolutely right, I don't care what's in between as long 
> as I have GigE
> at
> > > the end. Other options include using wave (too 
> expensive), or ethernet
> over
> > > MPLS (worth considering although latency may be too high 
> for longer that
> > > 1000 miles).
> >
> > there are solutions of this type. SURFNet line, currently 
> used for test
> > and network research is an example.
> > It is from Amsterdam to Chicago. It is presented as GigE at 
> the ends.
> >
> > So fairly long distance, RTT is  93 msec.Actually it  terminate as
> > SONET OC48  that goes too TDM Switch which has GigE interfaces.
> > So there is SONET encapsulation in the middle. In theory we can get
> > upto  2.5Gbps.
> >
> > Line is provided by Teleglobe. End equipements are
> > CISCO,  ONS 15454. This don't do any routing.
> >
> > This page may be interesting to browse.
> > http://carol.wins.uva.nl/~delaat/optical/index.html
> >
> > You can probably find different variants of such non 
> standard technology
> > from other carriers.
> >
> > -antony
> >
> 
> 




Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.