Chapter 1 General Troubleshooting

1.10.8 Free-Running Synchronization Mode

1.10.8 Free-Running Synchronization Mode

Symptom The clock is running at a different frequency than normal and the free-running synchronization(2.7.96 FRNGSYNC) alarm appears.

Table 1-27describes the potential cause of the symptom and the solution.

Table 1-27 Free-Running Synchronization Mode

Possible Problem

Solution

 

 

No reliable reference

The clock is using the internal oscillator as its only frequency reference. This

input is available.

occurs when no reliable, prior timing reference is available. See the

 

“FRNGSYNC” alarm on page 2-66for a detailed description of this alarm.

 

 

1.10.9 Daisy-Chained BITS Not Functioning

Symptom You are unable to daisy-chain the BITS.

Table 1-28describes the potential cause of the symptom and the solution.

Table 1-28 Daisy-Chained BITS Not Functioning

Possible Problem

Solution

 

 

Daisy-chaining BITS is

Daisy-chaining BITS causes additional wander buildup in the network and

not supported on the

is therefore not supported. Instead, use a timing signal generator to create

system.

multiple copies of the BITS clock and separately link them to each node.

 

 

1.10.10 Blinking STAT LED after Installing a Card

Symptom After installing a card, the STAT LED blinks continuously for more than 60 seconds.

Table 1-29describes the potential cause of the symptom and the solution.

Table 1-29 Blinking STAT LED on Installed Card

Possible Problem

Solution

 

 

The card cannot boot

The blinking STAT LED indicates that POST diagnostics are being

because it failed the

performed. If the LED continues to blink more than 60 seconds, the card has

Power On Shelf Test

failed the POST diagnostics test and has failed to boot.

(POST) diagnostics.

If the card has truly failed, an EQPT-BOOT alarm is raised against the slot

 

 

number with an “Equipment Fails To Boot” description. Check the alarm tab

 

for this alarm to appear for the slot where the card is installed.

 

To attempt recovery, remove and reinstall the card and observe the card boot

 

process. If the card fails to boot, replace the card.

 

 

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

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Cisco Systems ONS 15310-CL, ONS 15310-MA manual Free-Running Synchronization Mode, Daisy-Chained Bits Not Functioning
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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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