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Explore the 10 Gigabit Ethernet market, technology overview, applications, terms, and acronyms involved, including architectural components, standardization status, interoperability, and the current market status.
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10 Gigabit EthernetMarket and Technology Overview David O’Leary Director, Consulting Engineering
10 GbE Market Overview • Extension of existing Ethernet family of standards • Another 10x jump for higher capacity • Typical Ethernet applications at higher speed • Also positioned as a MAN/WAN technology for use over dark fiber or SONET/SDH
10 GbE Applications: Intra-POP Connectivity Aggregation Layer Customer CPE IP Core Routers & Switches 10GE Intra-POP; SONET to WAN Optical Core 10 GbE
10 GbE Applications: Internet Peering ISP 1 10 GE (Private) ISP 4 ISP 2 10 GE 10 GE 10 GE 10 GE ISP 3
10 GbE Applications: Server Connections Customer Cages Co-Location Facility Layer 4-7 Switches, Servers Optical Core 10 GE Connections IP Core Direct Attachment
10 GbE Applications: MAN or WAN SONET or dark fiber 10 GbE
10 GbE Technology Overview • Retention of 802.3 MAC and frame format • 64 – 1518 Byte frames • Jumbo-frames not included in standard • No half duplex mode • different from other versions of Ethernet • No CSMA/CD on full duplex • Simultaneous sending and receiving at all times • Works with 802.1Q, 802.3ad, etc. • Fiber interfaces only – no copper versions • LAN PHY – 10Gb/s • WAN PHY – 9.29Gb/s (SONET framing overhead)
10GbE Terms and Acronyms • PHY – PHYsical Layer Device • PMD – Physical Media Dependent • WIS – WAN Interface Sublayer • SONET rate and framing adaption • WWDM – Wideband Wave Division Multiplexing • XGMII – 10Gb Media Independent Interface • XAUI - 10Gb Attachment Unit Interface • XENPAK electrical interface • Replace or extend XGMII interface (lower cost) • XENPAK • consortium agreement for interoperability of 10Gb transceiver modules • Keyed Floating Duplex SC optical connector • PHY and PMD independent
10GbE Media Types • 10GBase-SR – up to 300m over dark fiber • 10GBase-SW – up to 300m over SONET • Both 850nm, multimode fiber • 10GBase-LR – 2m-10km over dark fiber • 10GBase-LW – 2m-10km over SONET • Both 1310nm, single mode fiber • 10Base-ER – 2m – 40km over dark fiber • 10Base-EW – 2m – 40km over SONET • Both 1550nm, single mode fiber • 10GBase-LX4 – 4 parallel wavelengths over single multi- or single-mode fiber pair at 1310nm
802.3ae Architectural Components Full Duplex 802.3 Media Access Control (MAC) 10Gb Media Independent Interface (XGMII) or 10Gb Attachment Unit Interface (XAUI) Serial WAN PHY 64B/66B + WIS Serial LAN PHY 64B/66B WWDM LAN PHY 8B/10B Serial PMD 1310nm Serial PMD 850nm Serial PMD 1550nm Serial PMD 850nm Serial PMD 1550nm Serial PMD 1310nm WWDM PDM 1310nm From: 10GE Alliance Technology Overview White paper
Standardization Status and Schedule • IEEE 802.3ae Working Group • Work began in 1999 • Project approved in January, 2000 • Currently at “Sponsor ballot” status • See IEEE web page for gory process details • http://grouper.ieee.org/groups/802/3/rules/ • Draft 4.3 is most current • Continuing to resolve various technical and editorial comments • Significant changes unlikely at this point • Final Standard quite likely in 2002 • Tentative June 13th ratification
Interoperability Status • May ’02 NetWorld+ Interop network test • 13 companies participated with 19 devices • Variety of switches, test equipment, fiber and components were included in the network • 4 of 7 Media types included • Chip level interconnect (XAUI) also tested http://www.10gea.org/10gea_pr_050702.pdf
Summary and Conclusions • 10 Gigabit Ethernet is viable now • Standard is basically complete • Products are shipping • Switch and router interfaces • Test equipment • As with all new technology: • Test for interoperability, check interoperability test results (UNH IOL, Interop, etc.) • Test for performance (interface and system)
Reference sites http://grouper.ieee.org/groups/802/3/ae/index.html (standard status, meeting minutes) http://www.10gea.org http://www.ethermanage.com/ethernet/10gig.html http://www.iol.unh.edu/training/index.html (good technical tutorials on MAC, fault signaling, etc.) http://www.xenpak.org/ http://www.sdsc.edu/10GigE/