Chapter 1 General Troubleshooting

1.2.2 Perform a Hairpin on a Source-Node Port

Test the Electrical Cabling

Step 1 Replace the suspect cabling (the cables from the test set to the electrical port) with a cable known to be good.

If a cable known to be good is not available, test the suspect cable with a test set. Remove the suspect cable from the electrical port and connect the cable to the Tx and Rx terminals of the test set. Run traffic to determine whether the cable is good or suspect.

Step 2 Resend test-set traffic on the loopback circuit with a good cable installed.

Step 3 If the test set indicates a good circuit, the problem is probably the defective cable. Replace the defective cable, then clear the loopback:

a.Double-click the card, then click the appropriate tab:

•Maintenance > DS1 > Loopback

•Maintenance > DS3 > Loopback

•Maintenance > EC1 > Loopback

b.Choose None from the Loopback Type column for the port being tested.

c.Choose the appropriate state (IS,AINS; OOS,DSBLD; or OOS,MT) from the Admin State column for the port being tested.

d.Click Apply.

e.Click Yes in the confirmation dialog box.

Step 4 If the test set indicates a faulty circuit, the problem might be a faulty port. Continue with the “1.2.2 Perform a Hairpin on a Source-Node Port” procedure on page 1-6.

1.2.2 Perform a Hairpin on a Source-Node Port

The hairpin test is performed on the first port in the network circuit. A hairpin circuit uses the same port for both source and destination. Completing a successful hairpin through this port isolates the possibility that the source port is the cause of the faulty circuit.

Create the Hairpin on the Source-Node Port

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

•If you just completed the “1.2.1 Perform a Facility Loopback on a Source-Node Port” procedure on page 1-4, leave the electrical test set connected to the electrical port.

•If you are starting the current procedure without the electrical test set connected to the electrical port, use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the electrical connectors for the port you are testing.

Step 2 Adjust the test set accordingly.

Step 3 Use CTC to set up the hairpin on the port being tested:

a.Click the Circuits tab and click Create.

b.Give the circuit an easily identifiable name, such as Hairpin1.

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 Perform a Hairpin on a Source-Node Port, Test the Electrical Cabling
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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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