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Autonomic Provisioning of Wavelength Multiplexed Fiber Optic Networks for Business Continuity Solutions

IP.com Disclosure Number: IPCOM000010988D
Original Publication Date: 2003-Feb-06
Included in the Prior Art Database: 2003-Feb-06
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Abstract

This disclosure provides the means for self-provisioning of wavelength multiplexing equipment. This allows the multiplexing equipment to automatically determine whether multiple data paths to the same destination are being routed along a potential single point of failure, and to correct this condition by re-provisioning some of the affected data paths. This contributes to higher system availability for business continuity and disaster recovery solutions.

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  Autonomic Provisioning of Wavelength Multiplexed Fiber Optic Networks for Business Continuity Solutions

  IBM has made available a number of high availability disaster recovery solutions, including geographically dispersed parallel sysplex (GDPS), which require interconnections between servers and storage over extended distances (50-100 km or more); to achieve this fiber optic links are used along with dense wavelength division multiplexing (DWDM) equipment. IBM has alliance partnerships and joint development relationships with Nortel, Cisco, Lucent, and others to provide this equipment, which is resold through IBM Global Services. The DWDM equipment offers the ability to combine several input channels over a single wavelength. It will soon be possible to send hundreds of data channels over a single DWDM wavelength. If multiple channels are intended to provide alternate paths to a storage control unit, they should be configured to provide continuous availability of the data in the event of any single point of failure (equipment break or fiber cut). It may be preferred to split the traffic among at least 2 DWDM wavelengths, each taking a different physical route through the network. Currently this provisioning must be done manually for each network; it is a time consuming process, prone to errors, and does not scale well as channels are added to the network. Some DWDM equipment offers 1 + 1 protection switching, that is intended to restore communication in the event of a fiber break. However, the traffic will take up to 50 ms to switch from the working path to a protected path. This is too long for most datacom equipment to tolerate. For this reason, customers need to understand when to use protected DWDM channels and when to avoid them. There is a need for some way to automatically provision a DWDM network, such that data traffic is always protected against single points of failure. It is further desirable to keep track of the network configuration, automatically reconfigure a complex network in the event of a fiber b...