Troubleshooting the Cooling Subsystems

Dial Shelf Cooling Subsystem

In the dial shelf, check the following to help isolate a problem with the cooling system:

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Do the blower assembly fans operate?

To determine whether the dial shelf fans are operating, listen for them. In noisy environments, place your hand under the exhaust vents on the back of the dial shelf blower assembly to feel for air being forced out the vents.

—If no, there is a problem with the dial shelf fans or there is a problem with the power to the blower assembly.

If you determine that the power supply is functioning normally but a fan is faulty, you can replace the blower assembly without powering off the access server. Refer to the blower assembly removal instructions in Chapter 2, “Preparing for Installation,”and the reinsertion instructions in Chapter 3, “Installing the Cisco AS5800.” For problems with the system power, refer to the section “Troubleshooting the Power Subsystem” in this chapter.

Is the green power LED on the blower assembly front panel on?

If no, verify that the blower assembly is fully installed in the dial shelf, the connector is firmly connected to the backplane, and the captive screws are tightened adequately.

Is the yellow fault LED on the blower assembly front panel on?

If yes, the newly installed blower assembly might be faulty or the chassis connector might be damaged. Shut off system power, remove the blower assembly from the dial shelf, and check the connectors. If the connectors are in good condition, reinstall the blower assembly in the dial shelf and power ON the system. If the fault LED is still on, assume that the blower assembly is faulty. Install another blower assembly and return the faulty blower assembly to the factory.

•The following error message, if displayed on the router shelf console, indicates that the system has detected an overtemperature condition or out-of-tolerance power somewhere in the system.

Queued messages:

%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown

If an environmental shutdown results from an out-of-tolerance power condition, the router shelf power OK LED remains off and the system shuts down. (Refer to the section “Troubleshooting the Power Subsystems” in this chapter.) Although an overtemperature condition is unlikely at initial startup, ensure that heated exhaust air from other equipment is not entering the router’s inlet vent and that there is sufficient clearance around the sides of the chassis to allow cooling air to flow. Refer to the “Preventive Site Configuration: Maintaining Normal Operation” section on page 2-20”for preventive site configurations.

The above message could also indicate a faulty component or temperature sensor. Before the system shuts down, use the show environment or show environment table command to display the internal chassis environment. Refer to the Cisco 7206 Installation and Configuration Guide for a description of show commands.

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AS5800 specifications

Cisco Systems has long been a leader in the networking and telecommunications field, and its AS5800 series of routers exemplify this tradition. The AS5800, along with the AS5850, AS5350, AS5400, and AS5300, provides robust solutions for service providers and enterprise-level networking applications. Each of these models has distinct features and characteristics that cater to the evolving demands of internet traffic and data processing.

The Cisco AS5800 is designed for high-capacity routing and optimized for broadband services. It supports a wide range of services, including voice, data, and video applications, making it a versatile option for service providers looking to deliver integrated solutions. It is equipped with advanced quality of service (QoS) features that ensure bandwidth is allocated effectively, holding strong even under heavy traffic conditions.

In comparison, the AS5850 offers superior processing capabilities and is typically utilized in larger-scale implementations. This model supports high-density interfaces, allowing numerous connections without compromising performance. Its architecture includes enhanced MPLS (Multiprotocol Label Switching) support, enabling more efficient traffic management and better utilization of network resources.

The AS5350 is known for its scalability and energy efficiency, ideal for voice-over-IP (VoIP) and media gateway applications. It supports various telephony features, such as protocol interworking and transcoding, making it a preferred choice for organizations focusing on digital voice technologies. The AS5300, while slightly older, continues to be a valuable asset for less demanding networks, offering reliable performance with VoIP capabilities and basic data applications.

The AS5400 bridges the gap between high-performance routing and operational efficiency. It incorporates Cisco's proprietary technologies to ensure seamless connectivity and robust failover systems. This model is highly regarded for its security features, protecting network integrity and providing peace of mind for businesses relying on sensitive data transfer.

Overall, Cisco’s AS5800 series showcases a progressive evolution of routing capabilities with enhanced features tailored for resilience, scalability, and performance. These routers not only address the technical needs of modern networks but also strategically position organizations for future growth in an increasingly digital world. Each model, with its unique attributes, continues to support the varied demands of global communication infrastructures.
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