Chapter 2 Alarm Troubleshooting

2.7.248 VCG-DOWN

Note For more information about Ethernet cards, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide.

Clear the VCG-DEG Condition

Step 1 Look for and clear any Critical (CR) alarms that apply to the errored card or port.

Step 2 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).

2.7.248 VCG-DOWN

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

SONET Logical Object: VCG

The VCAT Group Down alarm is a VCAT group alarm. The condition occurs when both member circuits carried by the ML-100T-8 Ethernet card are down. This condition occurs in conjunction with another Critical (CR) alarm.

Note For more information about Ethernet cards, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide.

Clear the VCG-DOWN Condition

Step 1 Complete the “Clear the VCG-DEG Condition” procedure on page 2-145.

Step 2 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).

2.7.249 VT-SQUELCH-L

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

The Ring is Squelching VT Traffic condition is raised on an OC-N facility. If the node failure scenario includes the source node, the node dropping VT will squelch VT traffic. The condition resolves when the node failure is recovered.

This condition is raised as NA severity by default. However, it indicates that traffic is squelched due to node failure, that is, traffic outage. Traffic outage can be caused by different problems, such as multiple LOS alarms, AIS-L, or node power outage. VT-SQUELCH-L is symptomatic and indicates that the user must investigate which node in a ring is being isolated and what causes node isolation.

Note VT-SQUELCH-L is an informational condition.

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

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Cisco Systems ONS 15310-MA manual Vcg-Down, Vt-Squelch-L, Clear the VCG-DEG Condition, Clear the VCG-DOWN Condition, 145
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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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