Chapter 2 Alarm Troubleshooting

Alarm Procedures

Step 7 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC to report

aservice-affecting problem (1-800-553-2447).

2.6.32CARLOSS (E Series)

Major (MJ), Service Affecting (SA)

A Carrier Loss alarm on the LAN E-series Ethernet (traffic) card is the data equivalent of an LOS (OC-N) alarm (see page 2-84). The Ethernet card has lost its link and is not receiving a valid signal. The most common causes of the CARLOSS alarm are a disconnected cable or an improperly installed Ethernet card. Ethernet card ports must be enabled (in service, IS) for CARLOSS to occur. CARLOSS is declared after no signal is received for approximately 2.5 seconds.

The CARLOSS alarm also occurs after a node database is restored. After restoration, the alarm clears in approximately 30 seconds after the node reestablishes Spanning Tree Protocol (STP). The database restoration circumstance applies to the E-series Ethernet cards but not the G1000-2 card, because the G1000-2 card does not use STP and is unaffected by STP reestablishment.

Warning Invisible laser radiation might be emitted from the end of the unterminated fiber cable or connector. Do not stare into the beam directly with optical instruments. Viewing the laser output with certain optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of 100

mmmight pose an eye hazard. Use of controls or adjustments or performance of procedures other than those specified might result in hazardous radiation exposure.

Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.

Procedure: Clear the CARLOSS (E-Series) Alarm

Step 1 Verify that the straight-through (Category 5) LAN cable is properly connected and attached to the correct port.

Step 2 If the straight-through (Category 5) LAN cable is properly connected and attached to the port, verify that the cable connects the card to another Ethernet device and is not misconnected to an OC-N card.

Step 3 If no misconnection to an OC-N card exists, verify that the transmitting device is operational. If not, troubleshoot the device.

Step 4 If the alarm does not clear, use an Ethernet test set to determine whether a valid signal is coming into the Ethernet port.

For specific procedures to use the test set equipment, consult the manufacturer.

Step 5 If a valid Ethernet signal is not present and the transmitting device is operational, replace the straight-through (Category 5) LAN cable connecting the transmitting device to the Ethernet port.

Step 6 If a valid Ethernet signal is present, complete the “Remove and Reinsert (Reseat) a Card” procedure on page 2-130for the Ethernet (traffic) card.

Step 7 If the alarm does not clear, complete the “Physically Replace a Card” procedure on page 2-130for the Ethernet (traffic) card.

Cisco ONS 15327 Troubleshooting Guide, R3.4

2-32

March 2004

 

 

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Cisco Systems ONS 15327 manual Carloss E Series, Procedure Clear the Carloss E-Series Alarm

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.