10 Gigabit Ethernet Market 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 10GE Intra- POP; SONET to WAN Routers & Switches Aggregation Layer Optical Core Customer CPE IP Core 10 GbE

10 GbE Applications: Internet Peering ISP 1 ISP 4 ISP 3 ISP 2 10 GE 10 GE (Private)

10 GbE Applications: Server Connections Co-Location Facility Optical Core Layer 4-7 Switches, Servers Direct Attachment Customer Cages IP Core 10 GE Connections

10 GbE Applications: MAN or WAN SONET or dark fiber 10 GbE

10 GbE Technology Overview  Retention of 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 WWDM PDM 1310nm WWDM LAN PHY 8B/10B Serial LAN PHY 64B/66B Serial PMD 850nm Serial PMD 1310nm Serial PMD 1550nm Serial PMD 850nm Serial PMD 1310nm Serial PMD 1550nm Serial WAN PHY 64B/66B + WIS 10Gb Media Independent Interface (XGMII) or 10Gb Attachment Unit Interface (XAUI) Full Duplex Media Access Control (MAC) 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   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 13 th 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

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 (standard status, meeting minutes) (good technical tutorials on MAC, fault signaling, etc.)