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Rivier College
CS575: Advanced LANs
10 Gigabit Ethernet
CS575
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Overview
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What is 10 Gigabit Ethernet?
Why 10 Gigabit Ethernet?
Physical Layer Technologies
10 Gigabit Ethernet in the LAN
10 Gigabit Ethernet in the MAN
10 Gigabit Ethernet in MAN over DWDM
10 Gigabit Ethernet in the WAN
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What is 10 Gigabit Ethernet?
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An extension to 10, 100, and 1000 Mbps IEEE 802.3 Ethernet
Offering 10 Gigabits per second data rate
An emerging IEEE 802.3ae Ethernet standard
The first draft of the standard is expected to be completed by
IEEE 802.3ae in 2001, with a full ratification of this standard
expected by the spring of 2002
10 Gigabit Ethernet will preserve many of the same characteristics
of previous versions of Ethernet
Unchanged Ethernet frame format and frame size, including both
maximum and minimum frame size
However, it supports full-duplex operation only
10 Gigabit Ethernet is not expected to be used for the direct
connection of end-stations and will therefore be offered via fiber
optic cable only
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What is 10 Gigabit Ethernet? (continued)
0 Initially, 10GbE will be used to provide high-speed interconnection
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between large-capacity switches in LAN environment
As the need increases, 10GbE will be deployed throughout the entire
network and will include server farm, backbone, and campus-wide
connectivity.
In addition, the standard for 10 Gigabit Ethernet is being developed
with an option for connection across MAN and WAN links at an
expected data rate compatible with OC192
This will enable the benefits of Ethernet technology to be extended
to the construction of MAN and WAN networks and to provide costeffective solutions for larger geographic areas
This will allow the construction of MANs and WANs that connect
geographically dispersed LANs between campuses or points of
presence (PoPs)
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What is 10 Gigabit Ethernet? (concluded)
0 These connections will be over dark fiber, dark wavelengths, or
SONET/TDM (Synchronous Optical Network) networks
0 Such attachment to the optical WAN backbone transport cloud,
introduces the concept of "Ethernet Everywhere."
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Why 10 Gigabit Ethernet?
0 An explosive growth in both Internet and intranet traffic due to:
- Increase in the number of network connections
- Increase in the connection speed of each end-station (e.g.,
10Mbps users moving to 100Mbps, analog 56k users moving to
DSL & Cable modems)
- Increase in the deployment of bandwidth-intensive applications
such as high-quality video
- Increase in Web hosting and application hosting traffic
0 The bandwidth demands of these applications will require an
increase in bandwidth hierarchy
0 The deployment of 1000Base-T switches (Gigabit Ethernet over
copper) demands faster technology with which to connect these
switches
0 Easy, straightforward migration to higher performance levels
without disruption
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Why 10 Gigabit Ethernet? (concluded)
0 Low cost of ownership – including both acquisition and
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support costs
Familiar management tools and common skills base
Ability to support new applications and data types
Flexibility in network design
Leverages the installed base of more than 300 million
Ethernet switch ports
Seamless integration of LAN, MAN, and WAN technologies
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Physical Layer Technology
0 Two families of physical interfaces are defined by the IEEE 802.3ae
Task Force:
- LAN PHY at 10,000 Mbps
- WAN PHY at a data rate compatible with OC-192c/SDH VC-464c
0 The IEEE 802.3ae Task Force has also specified physical layer
specifications that support link distances of at least 65m over MMF,
300m over installed MMF, as well as over SMF at 2km, 10km and
40km
0 Distance Objectives for IEEE 802.3ae
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Physical Layer Technology
Optical Transceiver for 10 Gigabit Ethernet
Source: 10 Gigabit Ethernet Alliance
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Physical Layer Technology (concluded)
0 The 10 Gigabit Ethernet Task Force has identified an optional
interface that matches the data rate and protocol
requirements of SONET OC-192/SDH STM-64
0 Therefore, 10 Gigabit Ethernet will be compatible with
SONET/SDH
0 This enables direct attachment of packet-based IP/Ethernet
switches to the SONET/SDH and time division multiplexed
(TDM) infrastructure
0 This feature is very important because it promises the ability
for Ethernet to use SONET/SDH for Layer 1 transport across
the WAN transport backbone
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10 Gigabit Ethernet in the LAN
Source: 10 Gigabit Ethernet Alliance
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10 Gigabit Ethernet in the MAN
Source: 10 Gigabit Ethernet Alliance
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10 Gigabit Ethernet in MAN over DWDM
Source: 10 Gigabit Ethernet Alliance
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10 Gigabit Ethernet in the WAN
Source: 10 Gigabit Ethernet Alliance
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How the WAN PHY Work
Source: 10 Gigabit Ethernet Alliance
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Byte Stuffing within the SONET/SDH Payload
Source: 10 Gigabit Ethernet Alliance
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References
W. Stalling, Local and Metropolitan Area Networks,
6th edition, Prentice Hall, 2000, Chapter 7
W. Stalling, Data and Computer Communications,
6th edition, Prentice Hall, 2002, Chapters 13-14
A. Wu, Advanced Local Area Networks, Lectures &
Slides, Rivier College, 2001.
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