LAn PHY - WAN PHY
LAn PHY - WAN PHY
LAn PHY - WAN PHY
Nortel Networks is an industry leader and innovator focused on transforming how the world communicates and exchanges information. The company is supplying its service provider and enterprise customers with communications technology and infrastructure to enable value-added IP data, voice and multimedia services spanning Wireline, Wireless Networks, Enterprise Networks, and Optical Networks. As a global company, Nortel Networks does business in more than 150 countries. More information about Nortel Networks can be found on the Web at:
www.nortelnetworks.com
For more information, contact your Nortel Networks representative, or call 1-800-4 NORTEL or 1-800-466-7835 from anywhere in North America. *Nortel Networks, the Nortel Networks logo, the globemark design, OPTera, and Preside are trademarks of Nortel Networks. All other trademarks are the property of their owners Copyright 2003 Nortel Networks. All rights reserved. Information in this document is subject to change without notice. Nortel Networks assumes no responsibility for any errors that may appear in this document.
October 2003
White Paper
Opportunity Knocks
Continued growth in demand and the need for rapid processing of bandwidth-intensive applications in data networks have had a tremendous impact on the Ethernet services in metro and regional networks. In todays data-hungry technological environment, business applications require bigger Ethernet pipes to server farms and backup centers. The cost of the desktop Ethernet interfaces has also continued to decrease significantly. The combination of bandwidth hungry applications and decreasing costs has resulted in the deployment of Gigabit Ethernet and 10-Gigabit Ethernet backbones. The ubiquity of Ethernet overall is also a main factor for its continued acceptance, which is a result of its cost/performance value. Many drivers require enterprise data networks to be highly connected over the MAN (Metro Area Network) and WAN (Wide Area Network), such as data centers connectivity, grid computing and distributed architectures. The MAN/WAN connectivity is a particularly important capability as enterprises look for technologies which allow them greater flexibility in implementing robust business continuity and disaster recovery strategies for secure networking. The addition of an extended distance capability to data networks to support the needs for distributed computing and interconnecting several business locations enables the transport of high bandwidth services, including native Ethernet, across the MAN and the WAN. This white paper explains the LAN and WAN variants of 10GigE interfaces and their importance for data networks. We then explore how WDM Wavelength Division Multiplexing technology becomes the key solution to support 10 GigE transport applications across metro and regional networks.
Gartner Dataquest published a report in May 2003 on the 10 GigE market, predicting high growth fueled by greater demand, new products and new pricing, pushing it beyond a billion dollars by 2007. According to a July 2003 report by LightReading, there are three main markets today for 10 GigE: data centers, research networks, and metroarea network deployments. Upgrades to corporate backbones, IP-enabled storage area networking, and broadband aggregation in cable and wireless networks are expected to drive demand in the future.
2002
2003
2004
2005
2006
Figure 1 Source: Gartner Dataquest May 12th, 2003; Ethernet Switches: WorldWide Market Share and Forecast, 2002-2007; by Rachna Ahlawat
2 of 6
2007
White Paper
Table 1 provides the detailed specifications for the two types of serial 10 GigE offerings.
3 of 6
White Paper
Compact CPE Packaging Multi-Service Support Unique Operational Support Enhanced Reach support for 10Gbit/s wavelengths
4 of 6
White Paper
Multi-Service Support
Support of the following 10G client-side protocols and bit rates in the WDM products is important: 9 10 GigE LAN PHY (10.3125 Gbit/s) - IEEE802.3ae D5 10GBASE-LR 9 10 GigE WAN PHY (9.95328 Gbit/s) - IEEE802.3ae, D5 10GBASE-LW 9 OC-192 (9.95328 Gbit/s) - SONET, OC-192; Telcordia GR-253 ANSI T1.105 9 STM-64 (9.95328 Gbit/s) - SDH STM-64; ITU G.707 9 10 Gbit/s Clear Channel A single 10 Gbit/sec transponder card that supports these various services allows a more flexible offer for upgrades and network changes, provides a limited sparing strategy, and a simple WDM platform overall. Furthermore, carriers can plan and build a network regardless of the client protocol, with the same link budgets and optical performance for the varied services. Furthermore, in addition to offering the 10 GigE LAN PHY and WAN PHY connectivity, the WDM platform must support services diversity required by the multi-protocol enterprise edge such as GigE, ESCON, 2.5G and Fibre Channel-100/200 to name a few.
5 of 6
White Paper
Line side Performance Management support: Optical power monitoring: 9 to validate the receive and transmit power level of the WDM signal for any sign of degradation Support for FEC Performance Monitoring parameters: 9 such as corrected errors, number of uncorrected frames Support for Digital Wrapper Performance Monitoring parameters 9 such as Section (Rx direction): Coding Violations, Errored Seconds, Severely Errored Seconds, Severely Errored Framed Seconds and Unavailable Seconds
Summary
In conclusion, the transparent transport of 10 GigE LAN and WAN PHY services over deterministic and low latency metro and regional optical networks is possible with costeffective proven WDM technology. Compared to Ethernet or IP networks, WDM networks offer, at the optical layer level, enhanced performance and transport predictability in addition to superior operational support. The use of WDM networks allows the 10 GigE LAN and WAN PHY services to be carried across a network with carrier-class reliability e.g. robust and manageable. This is truly a win-win solution for both service providers and enterprise customers. Service providers can leverage the support of a new revenue generating service and diversify their portfolio with a wide optical broadband service offering to their customers. The WDM/CPE Customer Premises Equipment - provides a clear demarcation point for service hand-off enabling monitoring and enforcement of Service Level Agreements (SLAs). The enterprise can either count on carriers to support their needs for extended metro 10G LAN/WAN PHY applications, or build their own network with technology that requires fiber connectivity from/to their business locations. 10 GigE services can now be deployed beyond the LAN in support of the continuing growth in data networks demand, and in line with the new regulations for business continuity and disaster recovery strategies.
References
[1] [2] Rochon, Philippe; Managing Ethernet Services in Next Generation Networks, NFOEC 2003 Lavalle, Brian; Next Generation SONET/SDH Networking Technologies, NFOEC 2003
6 of 6