Chapter 1 General Troubleshooting

Identify Points of Failure on an OC-N Circuit Path

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

Click the Apply button.

Click the Yes button in the Confirmation Dialog box.

d.The entire DS-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, contact the Cisco TAC.

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

Facility loopbacks, terminal loopbacks, and cross-connect loopback circuits are often used together to test the circuit path through the network or to logically isolate a fault. Performing a loopback test at each point along the circuit path systematically isolates possible points of failure.

The example in this section tests an OC-N circuit on a three-node BLSR. 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 All 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 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. Figure 1-12 on page 1-22shows an example of a facility loopback on a circuit source OC-N port.

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

April 2003

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Cisco Systems ONS 15327 manual Identify Points of Failure on an OC-N Circuit Path

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.