![]() ![]() (2.5 Gbps) backbone over private DWDM fiber amplification and regeneration needed for longer distancesĬalREN backbone wavesCalREN backbone wavesĬalRENCalREN-DC: 10/2003 to presentDC: 10/2003 to present.Wave Division Multiplexing (sort of) demystifiedWave Division plus, ISP “sub-layer” within CalREN-DC EE122, 12ĬalREN Optical Backbone, ca.small number of researchers requesting dark fiber between.Routing protocols – experiment with “dangerous” packets researchers requesting “private pipes” between campuses –Įxperiment with non-IP (unroutable) packets – experiment with.Multiple high-speed (2.5 Gbps, 10 Gbps, 40 Gbps, …)Ĭhannels over a single fiber pair (single fiber strand in some development of wave division multiplexing technology – providing.Run well-tested code, let somebody else find the bugsĬonstantly changingavoid change whenever possibleĪdvanced Services NetworksProduction NetworksĬENIC next generation backbone considerations (2)CENIC next Run new code as soon as it becomes available need for true separation of ISP traffic for rate-limitingĬapacity planning based on large amounts of headroom needed forĬapacity planning based on expected long-term utilization.need to separate production and research networks.provide redundant connections to campuses.eliminate dependence on flakey campus facilities.More important than flexibility (for research), it became veryĭifficult to deploy new features on the backbone.ĬENIC next generation backbone considerations (1)CENIC next Unexpected result: reliability and availability (for ISP) became mixing research and ISP traffic on a single backbone had an.commercial SONET circuits very expensive, especially after.campus support staff often not funded for 24x7 support.very little redundancy in network failures tended to have.Outages, flooding, rats, … (read: Evans Hall) Shortcomings of the original CalRENshortcomings of the original ![]() ISP traffic – separate path required in order to control campus ISPĬosts – diverse routing provided a measure of redundancy, forĪgainst failures (but Evans Hall Machine Room was still single subsequently added one, then two, OC-3 (155 Mbps) ATM links for. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |