Chapter 2 Alarm Troubleshooting

2.7.36 CARLOSS (CE100T)

b.Confirm that the attached Ethernet device configuration allows reception of flow control frames.

Step 8 If the alarm does not clear, disable and reenable the Ethernet port to attempt to remove the CARLOSS condition. (The autonegotiation process restarts.)

Step 9 If the alarm does not clear and the “TPTFAIL (CE100T)” alarm on page 2-140is also reported, complete the “Clear the TPTFAIL (CE100T) Alarm” procedure on page 2-141. If the TPTFAIL alarm is not raised, continue with the next step.

Note When the CARLOSS and the TPTFAIL alarms are reported, the reason for the condition could be the CE100T-8 card's end-to-end link integrity feature taking action on a remote failure indicated by the TPTFAIL alarm.

Step 10 If the TPTFAIL alarm was not raised, determine whether a terminal (inward) loopback has been provisioned on the port by completing the following steps:

a.In node view, click the card to go to card view.

b.Click the Maintenance > Loopback tabs.

c.If the service state is listed as OOS-MA,LPBK&MT, a loopback is provisioned. Go to Step 11.

Step 11 If a loopback was provisioned, complete the “Clear an Ethernet Card Loopback Circuit” procedure on page 2-157.

On the CE100T-8, provisioning a terminal (inward) loopback causes the transmit laser to turn off. If an attached Ethernet device detects the loopback as a loss of carrier, the attached Ethernet device shuts off the transmit laser to the CE100T-8 card. Terminating the transmit laser could raise the CARLOSS alarm because the loopbacked CE100T-8 port detects the termination. For more information about CE100T-8 cards, refer to the Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide.

If the port or card does not have a loopback condition, continue with Step 12.

Step 12 If a CARLOSS alarm repeatedly appears and clears, the reappearing alarm could be a result of mismatched STS circuit sizes in the setup of the manual cross-connect. Perform the following steps if the Ethernet circuit is part of a manual cross-connect by completing the following steps:

Note An Ethernet manual cross-connect is used when another vendor’s equipment sits between ONS nodes, and the Open System Interconnection/Target Identifier Address Resolution Protocol (OSI/TARP)-based equipment does not allow tunneling of the TCP/IP-based DCC. To circumvent a lack of continuous DCC, the Ethernet circuit is manually cross connected to an STS channel riding through the non-ONS network.

a.Right-click anywhere in the row of the CARLOSS alarm.

b.Right-click or left-click Select Affected Circuits in the shortcut menu that appears.

c.Record the information in the type and size columns of the highlighted circuit.

d.Examine the layout of your network and determine which node and card are hosting the Ethernet circuit at the other end of the Ethernet manual cross-connect using the following substeps:

•Log into the node at the other end of the Ethernet manual cross-connect.

•Double-click the Ethernet card that is part of the Ethernet manual cross-connect.

•Click the Circuits tab.

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 Alarm Troubleshooting Carloss CE100T
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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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