Appendix A Troubleshooting

Reading the LEDs

T1/E1 Interface LEDs

Table A-5summarizes the LEDs on the T1/E1 interface (available only for A901-12C-FT-D and A901-4C-FT-D).

Table A-5

T1/E1 Port LEDs

 

 

 

LED

Color/State

Description (two LEDs for each T1/E1 port)

 

 

 

Active

Green

Carrier condition—operating without problem

(labeled C,

 

 

Yellow

Loop condition

left LED)

 

 

Off

Out of service or not configured

 

 

 

 

Alarm

Yellow

Alarm condition

(labeled AL,

 

 

Off

No alarm

right LED)

 

 

 

 

 

SFP Ethernet Interface LEDs

Table A-6gives information about the LEDs on the SFP interface.

Table A-6

SFP LEDs

 

 

 

 

 

 

 

LED

 

 

Color/State

Description

 

 

 

 

SFP Link/Active

 

Orange

Link and active indicator

(labeled LINK ACT)

 

 

 

 

Off

Link not enabled

 

 

 

 

 

 

 

 

RJ-45 Ethernet Interface LEDs

Table A-7summarizes the LEDs on the RJ-45 Ethernet interface.

Table A-7

100/1000 Ethernet Port LEDs

 

 

 

LED

Color/State

Description (two LEDs for each 100/1000 Ethernet port)

 

 

 

100/1000

Solid Green

Link with no activity

RJ-45 link

 

 

Flash Green

Link with activity

(labeled L,

 

 

Off

No link detected

left LED)

 

 

 

 

 

100/1000

Green

Speed 1000

RJ-45 speed

 

 

Yellow

Speed 100

(labeled S,

 

 

Off

Off

right LED)

 

 

 

 

 

Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide

 

OL-23778-01

A-5

 

Page 55
Image 55
Cisco Systems ASR 901 manual T1/E1 Interface LEDs, SFP Ethernet Interface LEDs, RJ-45 Ethernet Interface LEDs

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.