This chapter examined the
This chapter presented only the basics for ONS 15454 MSTP system design. For complex scenarios, technical documentation for the ONS 15454 MSTP is available at Cisco.com for download and use.
Chapter 11. Using the ONS 15454 MSTP to Provide Wavelength Services
Traditionally, dense wavelength-division multiplexing (DWDM) has been used to relieve
As DWDM systems become more
This chapter examines the tenets of offering such "wavelength services" over the ONS 15454 Multiservice Transport Platform (MSTP) and explores the different categories and characteristics of wavelength services as they relate to ONS 15454 MSTP features/functions. The chapter concludes with a discussion on the management capabilities of ONS 15454 MSTP wavelength services.
Types of Wavelength Services
The ONS 15454 MSTP offers
Table 11-1 summarizes the DWDM wavelength service capabilities for the ONS 15454 MSTP system.
Table 11-1. ONS 15454 MSTP DWDM Wavelength Services Support
One of the key aspects of providing this type of service over DWDM is transparency. In effect, the DWDM system must operate as a virtual optical fiber extension, in that the SONET/SDH communications overhead bytes and performance-monitoring data should be preserved during transmissions. Both the 2.5-Gbps and 10-Gbps multirate transponder interfaces for the ONS 15454 MSTP allow for SONET/SDH services to operate
Storage-Area Networking Services
Characteristics for storage interconnect interfaces vary, depending on the type of storage protocols being distributed across the network. Where real-time data replication is required, full line-rate throughput for protocols such as Fibre Channel (FC) are essential. Consequently, distance-extension techniques such as buffer-to-buffer credits and flow control must be incorporated into the DWDM client interface. Conversely, asynchronous,
A wide range of storage interconnect protocols can be supported using the ONS 15454 MSTP transponder interfaces. The 2.5-Gbps multirate transponder can support
Ethernet interfaces are quickly becoming the predominant growth engine for transport networks. Because of its ubiquitous interface parameters and low-cost equipment, Ethernet is replacing services that time-division multiplexing (TDM) rates such as T1/T3 and OC-n typically
The ONS 15454 MSTP provides a full suite of transponder interfaces to effectively extend Ethernet networks across a DWDM transport network. Both the 2.5-Gbps multiservice aggregation card and the 2.5-Gbps multirate transponder provide SFP interfaces for native Gigabit Ethernet (GigE) transport. Both cards allow for low latency and packet loss, in that Ethernet Layer 2 source/destination switching is not required for transport. Additionally, Ethernet performance monitoring is available through frame/packet counters on the client interface ports.
For high-bit-rate Ethernet transmissions, the 10-Gbps multirate transponder can be utilized to support 10-GigE service extensions. The Ethernet services
Variable Bit-Rate Services
A critical aspect of DWDM wavelength services is flexibility and transparency. Some customer transport requirements don't easily fall into a well-known category or bit-rate scheme, such as SONET/SDH or Ethernet. For those cases, the DWDM wavelength system must exhibit the flexibility to interface with a variety of nonstandard or seldom-used transport technologies.
For the ONS 15454 MSTP DWDM system, the 2.5-Gbps multirate transponder allows for 2R provisioning. In this mode, the incoming client signal is transparently passed through the DWDM system without specific bit-rate or formatting requirements. As such, the ONS 15454 DWDM system does not provide performance-monitoring capability for 2R-transported signals. However, the 2R mode enables the carrier to offer DWDM wavelength transport of asynchronous signals, such as video and asynchronous transfer mode (ATM).