Chapter 1 General Troubleshooting

1.3 Identify Points of Failure on an OC-N Circuit Path

d.Click Apply.

e.Click Yes in the confirmation dialog box.

The entire DS-N circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies to carry live traffic.

1.3 Identify Points of Failure on an OC-N Circuit Path

Using facility loopbacks, terminal loopbacks, and cross-connect loopback circuits, you can test OC-N facilities or STSs on the ONS 15310-CL or ONS 15310-MA to logically isolate faults. For this purpose, you perform a loopback test at each point along the circuit path to systematically isolate a point of failure.

The example in this section tests an OC-N circuit on a three-node path protection. Using a series of facility loopbacks and terminal loopbacks, the path of the circuit is traced and the possible points of failure are tested and eliminated. A logical progression of seven network test procedures applies to this sample scenario:

1.Facility loopback on the source-node OC-N port

2.Cross-connect loopback on the source-node OC-N port

3.Terminal loopback on the source-node OC-N port

4.Facility loopback on the intermediate-node OC-N port

5.Terminal loopback on the intermediate-node OC-N port

6.Facility loopback on the destination-node OC-N port

7.Terminal loopback on the destination-node OC-N port

Note The test sequence for your circuits differs according to the type of circuit and network topology.

Note Facility and terminal loopback tests require on-site personnel.

1.3.1 Perform a Facility Loopback on a Source-Node OC-N Port

The facility loopback test is performed on the node source port in the network circuit, in this example, the source 15310-CL-CTX or CTX2500 OC-N port in the source node. Completing a successful facility loopback on this port isolates the OC-N port as a possible failure point. Performing a loopback on an in-service circuit is service-affecting.

Create the Facility Loopback on the Source OC-N Port

Step 1 Connect an optical test set to the port you are testing.

Use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are testing.

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0

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Cisco Systems ONS 15310-CL, ONS 15310-MA manual Identify Points of Failure on an OC-N Circuit Path
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ONS 15310-CL, ONS 15310-MA specifications

Cisco Systems has long been a leader in networking and telecommunications technology, and among its impressive lineup of products, the Cisco ONS 15310 series stands out as an essential solution for optical networking. This series includes models such as the ONS 15310-MA, ONS 15310-CL, and ONS 15310-CA, each designed to meet the diverse needs of service providers and enterprises seeking to enhance their optical transport networks.

The Cisco ONS 15310-MA is an advanced multi-service platform designed for metropolitan area networks. It facilitates the seamless transport of data, voice, and video over optical networks. One of its main features is its ability to support a variety of interfaces, including Ethernet, SONET/SDH, and Wavelength Division Multiplexing (WDM), allowing users to integrate multiple services into a single platform. Additionally, the ONS 15310-MA supports advanced traffic management and Quality of Service (QoS) features to prioritize critical applications and ensure consistent performance.

The ONS 15310-CL variant is tailored for more specific applications, providing enhanced capabilities aimed at delivering carrier-grade services. It features a robust architecture that accommodates high-capacity traffic without compromising reliability. This model emphasizes low power consumption and a compact design, making it suitable for deployment in space-constrained environments. The ONS 15310-CL also supports a wide range of optical interfaces, making it highly flexible for various network configurations.

In terms of technologies, the Cisco ONS 15310 series leverages Optical Transport Network (OTN) capabilities, providing high efficiency and greater bandwidth utilization. OTN technology enables efficient error correction and adds resilience to the network through its built-in protection mechanisms. Furthermore, the series supports seamless integration with existing IP/MPLS networks, creating a cohesive infrastructure as organizations evolve their networking requirements.

One of the defining characteristics of the ONS 15310 series is its focus on scalability. Network operators can start with a modest deployment and gradually expand capacity as demand grows. This adaptability is complemented by Cisco's comprehensive management and monitoring tools, providing operators with real-time insights into network performance and facilitating proactive management.

In conclusion, the Cisco ONS 15310-MA and ONS 15310-CL models represent sophisticated solutions for modern optical networks. With their versatile features, advanced technologies, and robust design, they empower service providers and enterprises to build resilient, high-capacity networks that meet the demands of today’s data-driven world.
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