Chapter 2 Alarm Troubleshooting

2.7.153 LPBKDS3FEAC

The Cross-Connect Loopback condition indicates that there is a software cross-connect loopback active between two OC-3 or OC-12 optical ports. A cross-connect loopback test occurs below line speed and does not affect traffic.

For more information on loopbacks, see the “1.2 Identify Points of Failure on an Electrical Circuit Path” section on page 1-3.

Note Cross-connect loopbacks occur below line speed. They do not affect traffic.

Clear the LPBKCRS Condition

Step 1 To remove the cross-connect loopback condition, double-click the 15310-CL-CTX or CTX2500 card in CTC to display the card view.

Step 2 Complete the “Clear an OC-N Port XC Loopback Circuit” procedure on page 2-156.

Step 3 If the condition does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

2.7.153 LPBKDS3FEAC

Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)

SONET Logical Object: DS3

A Loopback Due to FEAC Command DS-3 condition occurs when a DS-3 port loopback signal is received on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card in C-bit line type mode from the far-end node because of a FEAC command. An FEAC command is often used with loopbacks. LPBKDS3FEAC is only reported by these DS-3 ports.

Caution CTC permits loopbacks on an in-service (IS) circuit. Loopbacks are Service-Affecting (SA).

Clear the LPBKDS3FEAC Condition

Step 1 In node view, double-click the DS-3 card (15310-CL-CTX, DS1-28/DS3-EC1-3, or

DS1-84/DS3-EC1-3) to display the card view.

Step 2 Click the Provisioning > DS3 > Line tabs.

Step 3 Click the cell for the port in the Send Code column and click No Code from the drop-down list.

Step 4 If the condition does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

2.7.154 LPBKDS3FEAC-CMD

Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0

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Cisco Systems ONS 15310-MA manual LPBKDS3FEAC-CMD, Clear the Lpbkcrs Condition, Clear the LPBKDS3FEAC Condition, 101
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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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