Chapter 8 Troubleshooting Cisco 1800 Series Routers (Modular)

Problem Solving

When solving problems, consider the following router subsystems:

•Power and cooling systems—External power source, power cable, router power supply, circuit breaker, and router fan. Also check for inadequate ventilation or air circulation.

•Interface cards—LEDs on the interface cards help identify a failure.

•Cables—External cables that connect the router to the network.

Troubleshooting the Power and Cooling Systems

Both the system LED and the fans can help you troubleshoot a power problem. Check the following items to help isolate the problem:

Normal Indications

With the power switch on, the normal indications are:

•SYS PWR LED on green and continuous

•Fan operating

Fault Indications

Check the following symptoms to locate or eliminate faults in the power and cooling systems:

•With the power switch on, is the SYS PWR LED on?

–If the LED is green and continuous, the router is receiving power and is functional.

–If the LED is off, check the power source and power cable.

•With the power switch on and the SYS PWR LED on and green, does the fan operate?

–If no, check the fan.

–If yes, the power system is functioning.

•With the power switch on and the SYS PWR LED off, does the fan operate?

–If yes, the router is receiving power. The fan is connected directly to the DC outputs of the power supply.

–If no, check the power source and power cable.

•Does the router shut down after being on a short time?

–Check for an environmentally induced shutdown. See the next section, “Environmental Reporting Features, page 8-3.”

–Check the environmental site requirements in the “General Site Requirements” section on page 3-3.

–Check for a power supply failure by inspecting the SYS PWR LED on the front panel. If it is green, the power supply is functional.

•Router partially boots, but LEDs do not go on.

–Check for a power supply failure by inspecting the SYS PWR LED on the front panel of the router. If the SYS PWR LED is blinking or continuously green, the power supply is functional.

–If the SYS PWR LED is not on, see “Cisco One-Year Limited Hardware Warranty Terms” section on page 1-14.

Cisco 1800 Series Routers (Modular) Hardware Installation Guide

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Cisco Systems CISCO1841-HSEC/K9-RF Troubleshooting the Power and Cooling Systems, Normal Indications, Fault Indications
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CISCO1841-HSEC/K9-RF specifications

The Cisco Systems CISCO1841-HSEC/K9-RF is a versatile and robust router designed to meet the demands of small to medium-sized businesses and branch offices. This model is part of the Cisco 1800 Series Integrated Services Routers, which are known for their performance, security features, and scalability, making them ideal for organizations seeking to enhance their network infrastructure.

One of the main features of the CISCO1841-HSEC/K9 is its modular architecture. This design allows businesses to customize and expand their networks according to changing needs by adding various modules and interfaces. The router supports multiple WAN interfaces, which include serial, Ethernet, and DSL, providing flexible connectivity options to accommodate various networking scenarios.

The CISCO1841-HSEC/K9 also boasts an integrated security architecture. This router is equipped with advanced security features, including firewall capabilities, VPN support, and intrusion prevention systems. These technologies ensure that data is protected while being transmitted across the network. The built-in security features help organizations safeguard sensitive information against potential threats and cyberattacks.

In terms of performance, the CISCO1841-HSEC/K9 is powered by a high-speed processor and dynamic routing capabilities, which allow it to efficiently handle high volumes of traffic without compromising performance. The router supports various routing protocols, including EIGRP, OSPF, and BGP, facilitating seamless data flow and efficient route management.

Another noteworthy characteristic of the CISCO1841-HSEC/K9 is its support for voice and video services. This capability enables businesses to deploy unified communications applications, such as VoIP and video conferencing, enhancing collaboration among team members and improving overall productivity.

Moreover, the router is designed for easy management and monitoring. Cisco’s IOS software provides a user-friendly interface, allowing network administrators to configure, operate, and troubleshoot the network with ease. The router also supports Cisco’s Smart Install feature for simplified deployment and management.

In summary, the Cisco Systems CISCO1841-HSEC/K9-RF is a powerful and adaptable router that combines security, flexibility, and performance. Its modular design, robust security features, support for various routing protocols, and capabilities for multimedia applications make it a compelling choice for businesses looking to enhance their network infrastructure while addressing current and future demands.
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