Appendix A Troubleshooting

Problem Solving

Table A-2

Interpreting Environmental Reporting Features

 

 

 

 

 

Symptom

 

Possible Cause

Corrective Action

 

 

 

The router operates at an

There is a fan failure.

Take corrective steps. For

abnormally high temperature.

There is an air conditioner

information about environmental

The following message appears

operating conditions, see the

failure in the room.

on the console screen:

System Specifications, page 1-7).

The air flow to cooling vents is

%SYS-1-OVERTEMP: System

 

blocked.

 

detected OVERTEMPERATURE

 

 

 

condition. Please resolve

 

 

cooling problem immediately!

 

 

 

 

 

 

Troubleshooting Cables, and Connections

Network problems can be caused by a cable or cable connection, or external device such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. See Table A-3for information to help you isolate the problem.

Table A-3

Troubleshooting Cables, and Connections

 

 

 

 

 

Symptom

 

Possible Cause

Corrective Action

 

 

 

The router is experiencing

The router does not boot

Check the router chassis or

network problems.

properly.

software. For warranty

 

 

The router constantly or

information, refer to the Cisco

 

 

Information Packet publication

 

 

intermittently reboots.

 

 

that shipped with your router or

 

 

 

 

 

 

contact customer service.

 

 

 

 

 

 

The router boots, but the console

Verify that the parameters for

 

 

screen is frozen.

your terminal are set as follows:

 

 

 

 

 

(a) The terminal should have

 

 

 

the same data rate as the

 

 

 

router (9600 bps is the

 

 

 

default).

 

 

 

(b) 8 data bits.

 

 

 

(c) No parity generated or

 

 

 

checked.

 

 

 

(d) 2 stop bits.

 

 

 

 

 

 

The router powers on and boots

There may be a problem with the

 

 

only when a particular cable is

module or cable. For warranty

 

 

 

 

disconnected.

information, refer to the Cisco

 

 

 

Information Packet publication

 

 

 

that shipped with your order or

 

 

 

contact customer service.

 

 

 

 

Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide

 

OL-23778-01

A-3

 

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Cisco Systems ASR 901 manual Troubleshooting Cables, and Connections, Information Packet publication

ASR 901 specifications

Cisco Systems ASR 901 is an advanced aggregation services router that is designed to meet the needs of service providers and enterprise networks. It offers a versatile platform suitable for various deployment scenarios ranging from mobile backhaul and broadband aggregation to IP edge routing. The ASR 901 is known for its compact size, energy efficiency, and robust performance, making it a preferred choice for operators looking to enhance their network infrastructure.

One of the main features of the Cisco ASR 901 is its small form factor, which facilitates installation in space-constrained environments. Its design allows for easy deployment in both indoor and outdoor settings, making it ideal for applications such as cell site backhaul and remote locations. The router supports a wide range of interfaces, including Ethernet and T1/E1, providing flexibility in connecting different network types.

The ASR 901 is built on Cisco's IOS XR software, ensuring a highly reliable and secure operating environment. This software is known for its scalability and robustness, providing operators with the ability to support large numbers of subscribers and high traffic volumes. The router also supports system redundancy features, ensuring continuous service availability and minimizing downtime.

In terms of performance, the Cisco ASR 901 delivers high throughput and low latency, which are crucial for delivering quality services like voice, video, and data. With its support for advanced network technologies such as MPLS and IPv6, the ASR 901 can effectively manage complex networking requirements while accommodating future growth.

Security is also a key consideration with the ASR 901. It includes features such as advanced encryption, access control lists, and intrusion prevention systems, aimed at protecting the integrity of network communications. Moreover, its support for Virtual LAN (VLAN) tagging and Quality of Service (QoS) mechanisms allows for efficient traffic management and prioritization, ensuring that critical applications receive the necessary bandwidth.

Furthermore, Cisco provides comprehensive management tools for the ASR 901, allowing network administrators to easily monitor and configure the router. Features like SNMP and NetFlow enable operators to gain insights into network performance and usage patterns, facilitating proactive management of their environments.

Overall, the Cisco Systems ASR 901 stands out as a powerful and flexible router, designed to meet the evolving demands of modern networks. Its combination of compact design, scalability, and advanced features positions it as an ideal solution for service providers and enterprises seeking reliable and efficient network solutions.