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10GBASE-T CFI 802.3 Plenary, Nov 2002
1010 GbpsGbps Ethernet on Category Ethernet on Category 5 or Better Cabling: Customer 5 or Better Cabling: Customer
and Market Issuesand Market IssuesBruce Tolley
Cisco Systems, IncEmail: [email protected]
Draft 2.3
10GBASE-T CFI 802.3 Plenary, Nov 2002
10 GbE First Principles10 GbE First Principles
• It’s too expensive*• It’s too expensive• It’s too expensive• We need –LX4 to support installed
FDDI grade MM fiber• It does not support installed Cat 5
copper
Total cost= transceiver + media + system
10GBASE-T CFI 802.3 Plenary, Nov 2002
10 GbE Layer Diagram10 GbE Layer Diagram
Media Access Control (MAC)Full Duplex
Media Access Control (MAC)Full Duplex
CWDMCWDMPMDPMD
1310 nm1310 nm
SerialSerialPMDPMD
850 nm850 nm
CWDM CWDM LAN PHYLAN PHY(8B/10B)(8B/10B)
10 Gigabit Media Independent Interface (XGMII) or10 Gigabit Attachment Unit Interface (XAUI)
10 Gigabit Media Independent Interface (XGMII) or10 Gigabit Attachment Unit Interface (XAUI)
SerialSerialLAN PHYLAN PHY(64B/66B)(64B/66B)
SerialSerialPMDPMD
1310 nm1310 nm
SerialSerialPMDPMD
1550 nm1550 nm
SerialSerialPMDPMD
850 nm850 nm
SerialSerialPMDPMD
1310 nm1310 nm
SerialSerialPMDPMD
1550 nm1550 nm
SerialSerialWAN PHYWAN PHY
(64B/66B + WIS)(64B/66B + WIS)
-LX4 -SR -LR -SW -LW -EW-ER
Source: Cisco Systems
10GBASE-T CFI 802.3 Plenary, Nov 2002
Projected % Copper Shipments by Projected % Copper Shipments by CategoryCategory
0
10
20
30
40
50
60
70
2001 2002 2003
Cat5Cat5eCat6 Class E
Source: BSRIA Report 16383/02 Dec 2001
%
10GBASE-T CFI 802.3 Plenary, Nov 2002
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
1997 1998 1999 2000 2001 2002
TotalFiberCopper
GbE Fiber GbE Fiber vs vs CopperCopperPorts (000s)
Source: Dell’Oro 2002
802.3z STD 6/98
802.3ab STD 6/99
10GBASE-T CFI 802.3 Plenary, Nov 2002
10 GbE Applications10 GbE Applications
• Large majority of 10 GbE ports will be enterprise for deploymentin-building, constrained by installed base and by structured cabling standards
• Significant and material portion will be data center deployment,less constrained by installed base and less constrained by structured cabling standards
–Includes switch to server, switch to switch in rack or same room–Includes switch to DWDM in same room
• Material portion will be enterprise, building-to- building and service provider/metro ports (outside the building)
• Low-cost 1000BASE-T to the desk is key market driver
In other words: Majority of the market is enterprise/data center
10GBASE-T CFI 802.3 Plenary, Nov 2002
Data Data CentersCenters: Service Point : Service Point ArchitectureArchitecture
Internet
Tier-0: Network
LBSSL
FW
VPN
CachingStreaming
..
...
.Tier-1: WebTier-2: ApplicationTier-3: Backend? Web services? XML processing? JSP applications
? Large Databases? Data Warehousing? OLTP
? Networked Databases? E-mail? File/Print
SAN NAS NASSAN Directory
? Network services
Source: S. Muller, Sun
10GBASE-T CFI 802.3 Plenary, Nov 2002
EndEnd--Node and Data Center Node and Data Center PerformancePerformance
• Factors driving the need for increased performance• Scaling Tiers 1 and 2• Collapsing Tiers 0 and 1• Storage, iSCSI
• Mechanisms to increase performance• Hardware-assisted CPU load balancing• TCP/IP off load engines• Protocol acceleration/termination• Remote direct memory access protocol
RDMA
10GBASE-T CFI 802.3 Plenary, Nov 2002
10GBASE10GBASE--T ApplicationsT Applications
YES: XENPAK, X2, XPAK slots
Yes: But not for 2 or 3 years. 15 m not far enough
Yes: -SR high end if cheap enough,
Data center/Server farms
No
Yes in future
Most likely NO
Yes
10GBASE-T 10GBASE-CX10GBASE-fiberApplication
NONoIn-building horiz copper
NoYesBetween buildings, metro
Yes:Not likelyExternal backplane for stackables
NOYes LR on SMNeed -LX4 for MM
In building vertical
10GBASE-T CFI 802.3 Plenary, Nov 2002
10GBASE10GBASE--T T vs vs 10GBASE10GBASE--CX4CX4
CX4• Differentiated in time: NOW• Differentiated in application: will
not be used in structured cabling, will not be used by “late majority” technology adopters
• Will be used within and between racks (up to 15 meters)
10GBASE-T CFI 802.3 Plenary, Nov 2002
10GBASE10GBASE--TT• Priority 1
–100 meters on four pairs of Category 5 or better cabling
–Preserve existing investments in datacenter and structured cabling
• Priority 2–10GBASE-T PHY that can support 1000BASE-T,
either autonegotiate or configure–Support for XAUI (the installed base of GbE
switches will have XAUI slots)• Priority 3
–More than one PHY to support more than one application
10GBASE-T CFI 802.3 Plenary, Nov 2002
ConclusionsConclusions
We need 10GBASE-T•To grow the 10 GbE market•To lower the cost of 10 GbE
solutions•To support the installed base of
Cat 5 or better copper cablingWe should form a study group
