Chapter 8 Troubleshooting Cisco 1800 Series Routers (Modular)

Problem Solving

Environmental Reporting Features

If the router is operating at an abnormally high temperature, consider the following causes:

Fan failure

Air conditioner failure in the room

Air blockage to cooling vents

Take steps to correct the problem. See the “Site Environment” section on page 3-4.

Troubleshooting Cables, Connections, and Interface Cards

Network problems can be caused by cables, cable connections, or interface cards, or by external devices such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to help isolate the problem.

Card is not recognized by the router.

Make sure that the card is firmly seated in its slot.

Check the LEDs on the card. Each card has its own set of LEDs.

Make sure that you have a version of Cisco IOS software that supports the card.

Card is recognized, but interface ports do not initialize.

Make sure that the card is firmly seated in its slot.

Check external cable connections.

Make sure that you have a version of Cisco IOS software that supports the card. Check the software requirements for the affected card, which can be found in the configuration note for the card.

Router does not boot properly, or constantly or intermittently reboots.

Make sure that the card is firmly seated in its slot.

Check the router chassis or software.

Router boots, but the console screen is frozen.

Check the external console connection.

Verify that the parameters for your terminal are set as follows:

(a)The same data rate as configured for the router (9600 baud is the default)

(b)8 data bits

(c)1 stop bit

(d)No parity generated or checked

Router powers on and boots only when a particular card is removed.

Check the card. See the “Cisco One-Year Limited Hardware Warranty Terms” section on page 1-14and the “Obtaining Documentation and Submitting a Service Request” section on page 15 of the “Introduction to Cisco 1800 Series Routers (Modular) Hardware Documentation” document for warranty and customer service contact information.

Router powers on and boots only when a particular cable is disconnected.

Cisco 1800 Series Routers (Modular) Hardware Installation Guide

 

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Cisco Systems CISCO1841-HSEC/K9-RF manual Troubleshooting Cables, Connections, and Interface Cards

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.