Appendix A Troubleshooting

Reading Rear Panel LEDs

Table A-2

Cisco 3745 Router Front-Panel Indicators

 

 

 

LED Indicator

State

Description

 

 

 

SYS PS1

Off

Power supply not present, or failed.

and

 

 

Solid green

Power supply installed and operating normally.

SYS PS2

 

 

Amber

Power supply installed and powered off, or fault condition

 

 

 

detected.

 

 

 

–48V PS1

Off

–48-V power module not present, or failed.

and

 

 

Solid green

–48-V power module installed and operating normally.

–48V PS2

 

 

Amber

–48-V power module installed and powered off, or fault

 

 

 

condition detected.

 

 

 

Reading Rear Panel LEDs

The LEDs on the rear panel of the router enable you to determine router performance and operation. Figure A-3and Figure A-4show the LEDs on the rear panel of the router. For an explanation of these LEDs, see Table A-3and Table A-4.

Figure A-3 Cisco 3725 Router Rear-Panel LEDs

NM-HDV

BANK 4

 

 

 

 

AL

 

 

 

 

 

BANK 3

 

 

VWIC

LP

SEE

 

 

 

 

BANK 2

 

2MFT-E1

CD

 

 

 

 

 

 

 

MANUAL

 

 

 

 

 

 

BANK 1

 

CTRLR E2

BEFORE

 

 

 

 

 

 

 

BANK 0

CTRLR E1

INSTALLATION

TD

RD

LP

AL

 

 

 

 

 

V0

SEE

 

 

CD

MANUAL BEFORE

 

DSU

 

INSTALLATION

EN

 

 

56K

FastEthernet 0/1

FastEthernet 0/0

TD

RD

LP

AL

 

CD

 

SEE

 

 

 

 

 

 

 

 

 

MANUAL BEFORE

INSTALLATION

DSU

 

 

 

 

56K

SEE MANUAL BEFORE INSTALLATION

CF

72133

Table A-3

Cisco 3725 Router Rear-Panel Indicators

 

 

 

 

LED Indicator

 

State

Description

 

 

 

 

CF

 

Off

CompactFlash (CF) memory card can be

 

 

 

ejected; device is idle.

 

 

 

 

 

 

Solid or blinking green

Do not eject the CF; it is busy.

 

 

 

Fast Ethernet 0/0 ACT

Off

Interface not receiving packets.

and

 

 

 

 

Solid or blinking green

Interface receiving packets.

Fast Ethernet 0/1 ACT

 

 

 

 

 

Fast Ethernet 0/0 LINK

Off

No link established.

and

 

 

 

 

Solid green

Link is established.

Fast Ethernet 0/1 LINK

 

 

 

 

 

 

Cisco 3700 Series Routers Hardware Installation Guide

 

A-6

OL-2180-08

 

 

 

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Cisco Systems 3700 Series manual Reading Rear Panel LEDs, SYS PS1

3700 Series specifications

Cisco Systems 3700 Series routers are a pivotal part of Cisco's portfolio, designed for medium to large enterprises aiming to deliver secure and efficient networking capabilities. Introduced as a versatile solution, these routers provide a comprehensive blend of performance, scalability, and investment protection.

One of the standout features of the Cisco 3700 Series is its modular architecture, allowing organizations to customize their router according to specific needs. This modularity supports various modules for different functions, including voice, data, and video, making the 3700 Series an ideal choice for converged networking environments. Administrators can enhance functionality through an array of WAN and voice interface cards that adapt as the organization's needs evolve.

The 3700 Series is built on Cisco's IOS (Internetwork Operating System), ensuring robust and high-quality performance. It supports advanced routing protocols including EIGRP, OSPF, and BGP, facilitating efficient data transmission across diverse environments. This versatility helps organizations implement sophisticated multi-site connectivity and enables reliable performance in complex network scenarios.

Security is a paramount concern in modern networking, and the Cisco 3700 Series delivers with features such as integrated firewall services, VPN support, and intrusion detection capabilities. These security measures protect sensitive data and ensure secure communication between remote sites—critical in today’s cyber landscape.

Another key characteristic of the 3700 Series is its support for Quality of Service (QoS), which prioritizes time-sensitive traffic such as voice and video. By ensuring that critical applications receive the bandwidth they require, organizations can maintain the quality of service that their users expect.

Moreover, the Cisco 3700 Series is designed with redundancy in mind. Features like dual power supplies and hot-swappable fan trays enhance reliability and uptime, which are crucial for mission-critical applications.

Furthermore, energy efficiency is an increasingly important consideration in network design. The Cisco 3700 Series adheres to modern energy standards, helping reduce the overall carbon footprint while supporting high-performance capabilities.

In summary, the Cisco Systems 3700 Series routers stand out for their modularity, advanced routing capabilities, robust security features, and energy efficiency, making them an optimal choice for enterprises that not only need performance but also flexibility and reliability in their networking solutions. As businesses continue to evolve and adapt, the Cisco 3700 Series is a dependable partner in their connectivity journey, ensuring they can meet current demands while preparing for future challenges.