Tài liệu Cisco tolley_1_0103 pdf

Customer and Market Issues: 10 Gbps Ethernet on Category or Better Cabling Bruce Tolley Cisco Systems, Inc btolley@cisco.com IEEE 802.3 Interim January 2003 GbE Switch Ports: Fiber vs Copper Ports (000s) 802.3ab STD 6/99 8,000 7,000 6,000 802.3z STD 6/98 5,000 4,000 Total Fiber Copper 3,000 2,000 1,000 1997 Source: Dell’Oro 2002 1998 1999 2000 2001 IEEE 802.3 Interim January 2003 2002 Success of GbE on Copper • It is 10/100/1000 Mbps • It runs Cat5, 5e and • It does not obsolete the installed base • It does not require both ends of the link to be upgraded at the same time IEEE 802.3 Interim January 2003 10 GbE Layer Diagram Media Access Control (MAC) Full Duplex 10 Gigabit Media Independent Interface (XGMII) or 10 Gigabit Attachment Unit Interface (XAUI) CWDM LAN PHY (8B/10B) Serial LAN PHY (64B/66B) Serial WAN PHY (64B/66B + WIS) CWDM Serial Serial Serial PMD PMD PMD PMD 1310 nm 850 nm 1310 nm 1550 nm -LX4 -SR -LR -ER Serial Serial Serial PMD PMD PMD 850 nm 1310 nm 1550 nm -SW -LW -EW Source: Cisco Systems IEEE 802.3 Interim January 2003 Pluggable 10 GbE Modules: The Surfeit of SKUs 10GBASE PMDs -SR XENPAK X2/XPAK XAUI XFP XAUI X X X X -LR X -ER X -LX4 X X -CX4 X X -T X X X CWDM, DWDM X X X X Please: No new pluggable for 10GBASE-T! IEEE 802.3 Interim January 2003 Cumulative World-wide Shipments 1300 1200 Cat 1100 Cat Cat 5e Cat 1000 900 Cat5 Cat5 59% 51% 800 700 Outlets (millions) actual forecast 600 500 400 300 200 100 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Source: BSRIA IEEE 802.3 Interim January 2003 Estimated World-wide Installed Base End CY 2002 Note: Ignored Cat (~7% installed base) will inflate Cat share Cat 5/ old Class D 41% total outlets 680 million FTTD 0.4% Cat 5e/ new Class D 45% Cat 6/Class E 13% Cat 7/Class F 0.2% Source: LAN Technologies (2003) IEEE 802.3 Interim January 2003 10 GbE Copper Applications • Large majority of 10 GbE copper ports will be enterprise for deployment in-building –Constrained by installed base and by structured cabling standards • Significant and material portion will be data center deployment –Includes switch to server, switch to switch in rack or same room –Includes switch to DWDM in same room • Low-cost 1000BASE-T to the desk is key market driver IEEE 802.3 Interim January 2003 10GBASE-T Applications Application 10GBASE-fiber 10GBASE-T 10GBASE-CX In-building horiz copper No Yes No In building vertical Yes LR on SM Need -LX4 for MM Most likely No No Data center/Server farms Yes: -SR high end if Yes: But not for YES: XENPAK, cheap enough or years 15 m X2, XPAK slots not far enough External backplane for stackables Not likely Yes in future Yes Outside bldg Yes No No IEEE 802.3 Interim January 2003 Data Centers: Service Point Architecture SAN SAN NAS NAS Directory LB SS L VP N F W Caching Internet Streaming Tier-3: Backend Tier-2: Application Tier-1: Web Tier-0:.Network Network services Web services Large Databases ? Data Warehousing ? OLTP ? Source: S Muller, Sun Networked Databases ? E-mail ? File/Print ? ? ? XML processing ? JSP applications ? IEEE 802.3 Interim January 2003 10 10GBASE-T • Priority –100 meters on four pairs of Category or better cabling –Preserve existing investments in datacenter and structured cabling • Priority –10GBASE-T PHY that can support autonegotiation 1Gbps/10Gbps –Support for XAUI (the installed base of 1/10 GbE switches will have XAUI slots) • Priority –Include support for short reach applications (less than 100 meters) IEEE 802.3 Interim January 2003 11 Conclusions Request SG to study technical feasibility of 1) Support for Category 2) Support for Category 5e 3) Support for XAUI electrical interface 4) Support for negotiation between and 10 Gbps IEEE 802.3 Interim January 2003 12 ... nm -LX4 -SR -LR -ER Serial Serial Serial PMD PMD PMD 850 nm 1310 nm 1550 nm -SW -LW -EW Source: Cisco Systems IEEE 802.3 Interim January 2003 Pluggable 10 GbE Modules: The Surfeit of SKUs 10GBASE