We also had a large star-of-stars fddi-grade multimode outside plant
to service ~150 buildings. I looked at the cost of pulling a bigger
SMF plant to two core datacenters and depreciating it over 20yrs vs
buying & maintaining network equipment, ups's, generators, air
conditioning, etc as needed at each node site every 5/6 yrs. The
consolidation and economy of scale with more linecards in fewer
chassis, better UPS (we switched to DC plants with 10yr batteries )
with the new SMF topology paid off after what would have been the second
I would recommend that you do a similar analysis to see if it makes
sense for you.
Granted, we already had conduit in place to do the pulls, but of course
that followed the star of stars topology. So, we just have patch panels
at the old star node locations for the SMF, but no active equipment.
This also allowed us to "oversubscribe" the amount of SMF that comes
back to or two core network datacenters.
Of course the next thing we ran into was looking at very high density
patch panels for the datacenter. We went with a product line that is
targeted at the FTTH carriers and only takes up 3 racks or so (approx
2,000 strands per rack).
Thus spake David Ziemba ([log in to unmask]) on Wed, Dec 11, 2013 at 03:34:39PM +0000:
> All, We're getting to the point of needing to replace our FDDI-grade multi-mode with single-mode all over campus. We operate the classis three tier model, with 6 main campus distributions (and six geological star topologies).
> We've heard of a campus installing a ring throughout campus with every building landing in the data center. Still, most seem to be sticking with a star, or set-of-stars topology.
> We've also been looking at TRILL-based topologies, but haven't determined if that would require a difference fiber topology in our instance.
> David Ziemba
> Network Engineer
> ITS, Colorado College
> 14 E Cache Poudre
> Colorado Springs, CO 80903
> [log in to unmask]<mailto:[log in to unmask]>
> Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.