Chapter 1 General Troubleshooting

Circuits and Timing

Table 1-25 Circuit in Partial State (continued)

Possible Problem

Solution

 

 

During an automatic

Determine which node in the circuit is not changing to the desired state.

transition, some

Refer to the “View the State of Circuit Nodes” procedure on page 1-67.

path-level defects

Log into the circuit node that did not change to the desired state and examine

and/or alarms were

the circuit for path-level defects, improper circuit termination, or alarms.

detected on the circuit.

Refer to the Cisco ONS 15327 Procedure Guide for procedures to clear

 

One end of the circuit is

alarms and change circuit configuration settings.

not properly terminated.

Resolve and clear the defects and/or alarms on the circuit node and verify

 

that the circuit transitions to the desired state.

 

 

Procedure: View the State of Circuit Nodes

Step 1 Click the Circuits tab.

Step 2 From the Circuits tab list, select the circuit with the *_PARTIAL state condition.

Step 3 Click the Edit button. The Edit Circuit window appears.

Step 4 In the Edit Circuit window, click the State tab.

The State tab window lists the Node, CRS End A, CRS End B, and CRS State for each of the nodes in the circuit.

1.7.2 AIS-V on XTC-28-3 Unused VT Circuits

Symptom An incomplete circuit path causes an alarm indications signal (AIS).

Table 1-26describes the potential cause of the symptom and the solution.

Table 1-26 AIS-V on XTC-28-3 Unused VT Circuits

Possible Problem

Solution

 

 

The port on the

An AIS-V indicates that an upstream failure occurred at the virtual tributary

reporting node is

(VT) layer. AIS-V alarms also occur on XTC-28-3 VT circuits that are not

in-service but a node

carrying traffic and on stranded bandwidth.

upstream on the circuit

Perform the “Clear AIS-V on XTC-28-3 Unused VT Circuits” procedure on

does not have an OC-N

page 1-67.

port in service.

 

 

 

Procedure: Clear AIS-V on XTC-28-3 Unused VT Circuits

 

Step 1

Determine the affected port.

 

Step 2

Record the node ID, slot number, port number, and VT number.

 

Step 3

Create a unidirectional VT circuit from the affected port back to itself, such as

 

 

Source node/Slot 2/Port 2/VT 13 cross connected to Source node/Slot 2/Port 2/VT 13.

 

 

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

 

 

 

 

 

April 2003

 

 

1-67

 

 

 

 

 

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Cisco Systems ONS 15327 manual AIS-V on XTC-28-3 Unused VT Circuits, Procedure View the State of Circuit Nodes
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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.
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