Chapter 2 Alarm Troubleshooting

2.7.111 I-HITEMP

The Holdover Synchronization Mode condition is caused by loss of the primary and second timing references in the node. Timing reference loss occurs when line coding on the timing input is different from the configuration on the node, and it often occurs during the selection of a new node reference clock. The condition clears when primary or second timing is reestablished. After the 24-hour holdover period expires, timing slips could begin to occur on an ONS 15310-CL or ONS 15310-MA relying on an internal clock.

Clear the HLDOVRSYNC Alarm

Step 1 Clear additional alarms that relate to timing, such as:

•2.7.96 FRNGSYNC, page 2-66

•2.7.97 FSTSYNC, page 2-67

•2.7.110 HLDOVRSYNC, page 2-73

•2.7.131 LOF (BITS), page 2-85

•2.7.145 LOS (BITS), page 2-93

•2.7.166 MANSWTOINT, page 2-107

•2.7.167 MANSWTOPRI, page 2-107

•2.7.168 MANSWTOSEC, page 2-107

•2.7.169 MANSWTOTHIRD, page 2-108

•2.7.228 SWTOPRI, page 2-134

•2.7.229 SWTOSEC, page 2-134

•2.7.230 SWTOTHIRD, page 2-135

•2.7.231 SYNC-FREQ, page 2-135

•2.7.232 SYNCPRI, page 2-135

•2.7.233 SYNCSEC, page 2-136

•2.7.234 SYNCTHIRD, page 2-137

Step 2 Reestablish a primary and secondary timing source according to local site practice. If none exists, refer to the “Change Node Settings” chapter in the Cisco ONS 15310-CL and Cisco ONS 15310-MA Procedure Guide for procedures.

Step 3 If the alarm 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) in order to report a Service-Affecting (SA) problem.

2.7.111 I-HITEMP

Default Severity: Critical (CR), Service-Affecting (SA)

SONET Logical Object: NE

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

2-74

Page 183 Page 185
Page 184
Image 184
Cisco Systems ONS 15310-CL, ONS 15310-MA manual Clear the Hldovrsync Alarm
Page 183 Page 185

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.
Top Page Image Contents