Using 10 Gigabit Ethernet in Volume Applications

1
Using 10 Gigabit Ethernetin Volume Applications

• Brad Booth, Director Advanced ProductsQuake
  Technologies
• Blaine Kohl, VP of MarketingTehuti Networks

2
10GBASE-T Overview

• Physical layer device (PHY)
• 64B/65B encoding (similar to 10GBASE-R)
• Low density parity check framing
• Double-square constellation (PAM16 w/ ½ the code
  points)
• Tomlinson-Harashima precoder
• Reach
• Cat 6 up to 55 m Cat 6A and Cat 7 up to 100 m
• Cat 5 and 5e are below the performance range
  required
• Power
• All that complexity costs
• Estimates range from 10 to 15 W
• Short reach mode (up to 30 m) has a target of sub
  4 W

3
10GBASE-T Market
Std-Compliant
Pre-Std
Standard Development
2005
2006
2007
2008
2009
2010
Volume Adoption
Market Influencers
Early Adopters

• Early adopters national labs, supercomputing
• Market influencers banks, hospitals, govt.,
  video
• Volume adoption corporate data centers
• UTP copper cabling is preferred by IT departments
• Therefore, 10GBASE-T is preferred over optics and
  CX4

4
Impact to Network

• Cable infrastructure
• Alien crosstalk has the biggest impact on UTP
  cabling
• Shielded cabling has better performance, but
  higher cost
• Infrastructure could require an upgrade
• Energy requirements
• Alternatives currently have lower power
• Short reach better cable reduce power
  requirement
• System impact
• Bandwidth still exceeds volume server performance
  capability

5
Trade-offs
Technology Date of Standard Reach(m - max) Latency(ns - RT) Power(W - typ)
10GBASE-SR June 2002 300 600 2
10GBASE-CX4 Feb. 2004 15 250 1
10GBASE-T June 2006 10030 27501500 124
10GBASE-LRM Sept. 2006 220 1500 3

• Optics (SR LRM) driving to new form factor
  SFP
• Goal is to reduce cost and power
• CX4 cable is expensive reach is limited
• Target applications are inter-rack and intra-rack

Latency is as specified in standard or draft
standard and includes XAUI PHY interface.
Projected standards ratification date. Short
reach mode latency and power are not specified
in the draft standard and are only estimates.
6
Interoperability

• UNH-IOL has test suites for
• 10GBASE-SR and 10GBASE-CX4
• Both have existed in the market for years
• Ethernet Alliance and UNH-IOL
• Partnering for demonstration of emerging
  technologies
• 10GBASE-T
• 10GBASE-LRM
• Coordinating development of test suites