Chapter 1 General Troubleshooting

Identify Points of Failure on an OC-N Circuit Path

Procedure: Test the Terminal Loopback Circuit

Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test traffic being received by the test set. Look for errors or any other signal information that the test set is capable of indicating.

Step 3 If the test set indicates a good circuit, no further testing is necessary on the loopback circuit:

a.Clear the terminal loopback:

Double-click the OC-N card in the intermediate node with the terminal loopback.

Click the Maintenance > Loopback tabs.

Select None from the Loopback Type column for the port being tested.

Select the appropriate state (IS, OOS, or OOS_AINS) in the State column for the port being tested.

Click the Apply button.

Click the Yes button in the Confirmation Dialog box.

b.Clear the terminal loopback circuit:

Click the Circuits tab.

Choose the loopback circuit being tested.

Click the Delete button.

Click the Yes button in the Delete Circuits dialog box.

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

Step 4 If the test set indicates a faulty circuit, the problem might be a faulty card.

Step 5 Proceed to the “Test the OC-N Card” procedure on page 1-40.

Procedure: Test the OC-N Card

Step 1 Replace the suspect card with a card known to be good. See the “Physically Replace a Card” procedure on page 2-130for details.

Step 2 Resend test traffic on the loopback circuit with a good card.

Step 3 If the test set indicates a good circuit, the problem is probably the defective card:

a.Return the defective card to Cisco through the returned materials authorization (RMA) process. Contact the Cisco TAC.

b.Replace the defective OC-N card. See the “Physically Replace a Card” procedure on page 2-130for details.

c.Clear the terminal loopback:

Double-click the OC-N card in the source node with the terminal loopback.

Click the Maintenance > Loopback tabs.

Select None from the Loopback Type column for the port being tested.

Cisco ONS 15327 Troubleshooting Guide, R3.4

1-40

April 2003

 

 

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Cisco Systems ONS 15327 manual Procedure Test the Terminal Loopback Circuit

ONS 15327 specifications

Cisco Systems ONS 15327 is a high-performance optical networking solution tailored for service providers and enterprises looking to enhance their optical communication infrastructure. This versatile platform is recognized for its robust performance, scalability, and flexibility, making it suitable for a wide array of applications ranging from broadband access to metropolitan area networking.

One of the standout features of the ONS 15327 is its ability to handle multiple data types over a single platform. It supports a rich array of protocols, including Ethernet and SONET/SDH, allowing service providers to deliver a diverse portfolio of services to their customers. This multiservice capability simplifies the network architecture, reducing operational complexity and costs.

The ONS 15327 is designed with a modular architecture, which enables operators to customize and scale their network as demand grows. It supports a variety of card options for different media types, wavelengths, and capacity requirements. This modularity not only facilitates straightforward upgrades but also allows for efficient network management.

In terms of technology, the ONS 15327 leverages dense wavelength division multiplexing (DWDM) capabilities to maximize the utilization of available fiber bandwidth. This allows for an impressive increase in transmission capacity without the need for additional fiber installations, making it a cost-effective solution for expanding networks.

Another significant characteristic of the Cisco ONS 15327 is its advanced performance monitoring and management features. Built-in diagnostic tools provide real-time visibility into network performance, enabling prompt identification and troubleshooting of potential issues. This proactive approach to network management enhances service reliability and customer satisfaction.

Security is also paramount in the ONS 15327. The platform integrates various security features and protocols to protect the data traversing the network, ensuring compliance with industry standards and safeguarding sensitive information.

Furthermore, the equipment is designed for easy integration into existing infrastructures. Its compatibility with Cisco’s broader networking solutions allows for seamless interconnection with routers, switches, and other devices, facilitating comprehensive network solutions.

In conclusion, Cisco Systems ONS 15327 stands out as a powerful optical networking platform that combines versatility, scalability, and advanced management features. Its ability to support various protocols and harness optical technologies makes it an essential tool for organizations aiming to optimize their telecommunications infrastructure while minimizing costs and complexity.