C H A P T E R 9

SDH Topologies and Upgrades

Note The terms “Unidirectional Path Switched Ring” and “UPSR” may appear in Cisco literature. These terms do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration. Rather, these terms, as well as “Path Protected Mesh Network” and “PPMN,” refer generally to Cisco's path protection feature, which may be used in any topological network configuration. Cisco does not recommend using its path protection feature in any particular topological network configuration.

This chapter explains Cisco ONS 15310-MA SDH topologies and upgrades. To provision topologies, refer to the Cisco ONS 15310-MA SDH Procedure Guide.

Chapter topics include:

9.1 Subnetwork Connection Protection Configurations, page 9-1

9.3 Interoperability, page 9-4

9.2 Terminal Point-to-Point and Linear ADM Configurations, page 9-3

9.4 Path-Protected Mesh Networks, page 9-6

9.5 Four Node Configurations, page 9-8

9.6 STMN Speed Upgrades, page 9-8

9.7 Overlay Ring Circuits, page 9-9

9.1Subnetwork Connection Protection Configurations

Subnetwork Connection Protection (SNCP) configurations provide duplicate fiber paths around the ring. Working traffic flows in one direction and protection traffic flows in the opposite direction. If a problem occurs with the working traffic path, the receiving node switches to the path coming from the opposite direction.

CTC automates ring configuration. Subnetwork Connection Protection traffic is defined within the ONS 15310-MA SDH on a circuit-by-circuit basis. If a path-protected circuit is not defined within a 1+1 line protection scheme and Subnetwork Connection Protection is available and specified, CTC uses Subnetwork Connection Protection as the default.

A Subnetwork Connection Protection circuit requires two data communications channel (DCC)-provisioned optical spans per node. Subnetwork Connection Protection circuits can be created across these spans until their bandwidth is consumed.

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

 

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Cisco Systems 15310-MA manual SDH Topologies and Upgrades, Subnetwork Connection Protection Configurations

15310-MA specifications

Cisco Systems has established itself as a leader in the networking domain, offering a wide array of solutions to meet the needs of modern businesses. Among its impressive product lineup are the Cisco 15310-CL and 15310-MA routers, designed to provide advanced network performance and reliability.

The Cisco 15310-CL is a versatile platform that primarily serves as a carrier-class router aimed at supporting high-speed data and voice services. It is built to handle the demands of large enterprises and service providers, offering a robust design that ensures maximum uptime and performance. One of its standout features is its modular architecture, which enables users to customize their configurations based on specific application needs. This scalability allows for future expansion without the need for a complete hardware overhaul.

Key technologies integrated into the Cisco 15310-CL include high-density Ethernet interfaces and a comprehensive suite of Layer 2 and Layer 3 protocol support. The device is capable of supporting multiple types of connections, including TDM, ATM, and Ethernet. This flexibility makes it an ideal choice for organizations that require seamless migration between various service types. Moreover, with features such as MPLS (Multiprotocol Label Switching) support and advanced Quality of Service (QoS) mechanisms, the router ensures that critical applications receive the necessary bandwidth and low latency required for optimal performance.

In contrast, the Cisco 15310-MA focuses on access solutions, providing a cost-effective entry point for businesses looking to enhance their network capabilities. It is well-suited for smaller offices or branch locations that need reliable connectivity without the expense and complexity associated with larger systems. The device supports a range of access methods and provides essential features like firewall capabilities, VPN support, and comprehensive security measures to protect sensitive data.

Both models benefit from Cisco's commitment to security and manageability, offering features like enhanced encryption protocols and user authentication mechanisms that help safeguard networks against threats. Additionally, they can be managed through Cisco’s intuitive software tools, simplifying configuration and monitoring tasks for IT administrators.

The Cisco 15310-CL and 15310-MA are ideal solutions for businesses seeking to enhance their network infrastructure, ensuring firms can keep pace with evolving technology demands while maintaining a focus on security and performance. Their combination of advanced features, modular capabilities, and robust support makes them valuable assets in the networking landscape.