Chapter 3 Troubleshooting

Diagnosing Problems

Table 3-2 Common Problems and Their Solutions (continued)

Symptom

Possible Cause

Resolution

 

 

 

LRE status LED not turned

RJ-21 cable loose or not connected

Reseat RJ-21 connector and fasten

on.

properly.

with screw or cable tie.

 

 

 

 

 

 

 

 

Trunk cable defective.

Verify trunk cable, repair or use

 

 

 

 

alternate pair.

 

 

 

 

 

 

 

 

CPE device absent, not powered, or

Check CPE device, and refer to

 

 

 

defective.

installation guide.

 

 

 

 

 

 

 

 

CPE device out of maximum range.

Consider modification to

 

 

 

 

topology to shorten reach or

 

 

 

 

improve wiring quality.

 

 

 

LRE status LED stays

Trunk quality too poor to support desired

Select a lower profile. For

amber.

profile.

 

more information, refer to the

 

 

 

 

 

Catalyst 2900 Series XL and

 

 

 

 

 

Catalyst 3500 Series XL

 

 

 

 

 

Software Configuration

 

 

 

 

 

Guide.

 

 

 

 

Assess possibility of

 

 

 

 

 

improving trunk quality.

 

 

 

 

 

 

 

 

Excessive interference from other

Consider use of appropriate

 

 

 

services in bundle.

 

public profile in bundles

 

 

 

 

 

shared with other services.

 

 

 

 

Restrict the use of spectrally

 

 

 

 

 

incompatible services.other

 

 

 

 

 

services.

 

 

 

 

 

 

 

 

Local nonstandard noise source.

Consult Cisco sales representative

 

 

 

 

for installation optimization.

 

 

 

LRE link goes down when

Unfiltered phone tap on LRE line.

Plug phone into PHONE

phone is taken off-hook,

 

 

socket on CPE device.

placed on-hook, rings, or

 

Insert microfilter between

dials.

 

 

 

phone and LRE line. For

 

 

 

 

 

 

 

 

 

 

more information about

 

 

 

 

 

microfilters, contact your

 

 

 

 

 

Cisco sales representative.

 

 

 

 

 

 

 

 

 

Catalyst 2900 Series XL Hardware Installation Guide

 

 

 

 

 

 

 

 

3-6

 

 

 

 

78-6461-03

 

 

 

 

 

 

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Cisco Systems manual Catalyst 2900 Series XL

2900 Series XL specifications

Cisco Systems 2900 Series XL routers are integral components of the Cisco Integrated Services Router (ISR) portfolio, designed to support various networking needs for small to medium-sized enterprises. These routers provide an extensive set of features tailored for voice, video, data, and wireless services, making them a versatile choice for organizations looking to streamline their network infrastructure.

One of the standout features of the 2900 Series XL is its modularity. This router is equipped with multiple interface card slots that allow users to customize and scale their network based on current and future requirements. The modular design offers flexibility in integrating various WAN interfaces such as T1/E1, DSL, and Ethernet, enabling businesses to adapt to changing connectivity needs without requiring a complete hardware overhaul.

The 2900 Series XL also supports a wide range of advanced security features. With integrated security protocols, such as firewall capabilities, Intrusion Prevention Systems (IPS), and Virtual Private Network (VPN) support, these routers ensure that sensitive company data remains protected against potential threats. Furthermore, the routers come with Cisco’s Adaptive Security Algorithm, which helps to detect and mitigate real-time attacks.

Another significant characteristic of the Cisco 2900 Series XL is its support for unified communications. The routers have built-in voice capabilities, allowing them to function as a voice gateway. This facilitates features like VoIP (Voice over IP), video conferencing, and even multimedia communication. These tools enhance collaboration and connectivity among team members, contributing to a more productive work environment.

The 2900 Series XL routers also include Cisco's IOS Software, which provides a robust operating system with a rich set of features for routing, switching, and security functions. The software is continually updated to ensure the routers remain compatible with the latest technology and security standards, thereby extending their functionality and lifespan.

In terms of performance, the 2900 Series XL routers are designed for high throughput and low latency, making them suitable for bandwidth-intensive applications. Their architecture supports services such as advanced Quality of Service (QoS) and traffic shaping, ensuring that mission-critical applications receive the bandwidth priority they require.

Ultimately, Cisco's 2900 Series XL routers represent a reliable, flexible solution for organizations looking to enhance their networking capabilities. With their exceptional features, comprehensive security options, and support for diverse applications and services, they play a crucial role in the modern digital landscape.