Chapter 1 General Troubleshooting

1.3.3 Perform a Terminal Loopback on a Source-Node OC-N Port

Step 4 If the test set indicates a faulty circuit, there might be a problem with the cross-connect portion of the 15310-CL-CTX or CTX2500. Complete the “1.3.3 Perform a Terminal Loopback on a Source-NodeOC-N Port” procedure on page 1-17.

1.3.3 Perform a Terminal Loopback on a Source-Node OC-N Port

The terminal loopback test is performed on the node destination port in the circuit, in this example, the destination OC-N port in the source node. First, create a bidirectional circuit that starts on the node source OC-N port and loops back on the node destination OC-N port. Then continue with the terminal loopback test. Completing a successful terminal loopback to a node destination OC-N port verifies that the circuit is good up to the destination OC-N. Performing a loopback on an in-service circuit is service-affecting.

Create the Terminal Loopback on a Source Node OC-N Port

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

a.If you just completed the “1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port” procedure on page 1-15, leave the optical test set connected to the OC-N port in the source node.

b.If you are starting the current procedure without the optical test set connected to the OC-N port, use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are testing.

c.Adjust the test set accordingly.

Step 2 Use CTC to set up the terminal loopback circuit on the port being tested:

a.Click the Circuits tab and click Create.

b.Give the circuit an easily identifiable name, such as OCN1toOCN2.

c.Set circuit Type and Size to the normal preferences, such as STS and STS1.

d.Verify that Bidirectional is checked.

e.Click Next.

f.In the Circuit Source dialog box, fill in the same Node, Slot, Port, and Type where the test set is connected and click Next.

g.In the Circuit Destination dialog box, fill in the destination Node, Slot, Port, and Type (the OC-N port in the source node) and click Finish.

Step 3 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.

Note It is normal for a 2.7.162 LPBKTERMINAL (OCN) condition to appear during a loopback setup. The condition clears when you remove the loopback.

Step 4 Create the terminal loopback on the destination port being tested:

a.In node view, double-click the card that requires the loopback.

b.Click the Maintenance > Optical > Loopback > Port tabs.

c.Select OOS,MT from the Admin State column.

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

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Cisco Systems ONS 15310-MA, ONS 15310-CL manual Perform a Terminal Loopback on a Source-Node OC-N Port
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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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