Chapter 14 Configuring Resilient Packet Ring on the ML-Series Card

Understanding RPR

Note

Note

Note

Figure 14-2 RPR Ring Wrapping

Ring Wrap

Fiber Cut

ML-Series RPR

Ring Wrap

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In case of a ring failure, the ML-Series cards connected to the failed section of the RPR detect the failure through the SONET path alarms. When any ML-Series card receives this path-AIS signal, it wraps the POS interface that received the signal.

If the POS interfaces on the ML100T-8 cards on either 15310MA or 15310CL receives the SF-P condition, then the SPR ring does not wrap.

If the carrier delay time is changed from the default, the new carrier delay time must be configured on all the ML-Series card interfaces.

ML-Series card POS interfaces normally send an alarm for signal label mismatch failure in the STS path overhead (PDI-P) to the far end when the POS link goes down or when RPR wraps. ML-Series card POS interfaces do not send PDI-P to the far-end when PDI-P is detected, when a remote defection indication alarm (RDI-P) is being sent to the far end, or when the only defects detected are generic framing procedure (GFP)-loss of frame delineation (LFD), GFP client signal fail (CSF), virtual concatenation (VCAT)-loss of multiframe (LOM), or VCAT-loss of sequence (SQM).

RPR Framing Process

The ML-Series card uses a proprietary RPR frame and HDLC or GFP-F framing. It attaches the RPR frame header to each Ethernet frame and encapsulates the RPR frame into the SONET payload for transport over the SONET topology. The RPR header is removed at the egress ML-Series card. Figure 14-3illustrates the RPR frame.

Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5

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Cisco Systems 15310-MA, 15310-CL manual RPR Framing Process, 14-4
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15310-CL, 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.
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