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

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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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Contents Cisco Systems, Inc Page Audience Enter a Directory and Determine the Current Directory Time of Day Pinouts OL-23778-01 Revision Date Change Summary Document Revision HistoryAudience ObjectivesOrganization ConventionsRelated Documentation Safety WarningsOL-23778-01 Hardware Description IntroductionCisco ASR 901 Router Front View Cisco ASR 901 Router-Front View Cisco ASR 901 Router Ethernet Version Front ViewFan Grounding Point Lug Cisco ASR 901 Router Rear ViewSafety Precautions Power SupplySpecification Value LEDsRTN Pin Connector aSystem Specifications Environmental Monitoring Temperature SensorPin Connector B Description SpecificationInterface Number Location Label Router Interface NumberingRegulatory Compliance OL-23778-01 Safety with Equipment Safety GuidelinesSafety with Electricity Preventing Electrostatic Discharge Damage Prerequisites Power Supply ConsiderationsSite Planning Site EnvironmentAir Flow Guidelines Method of ProcedureRequired Tools and Equipment Unpacking and Checking the Contents of your ShipmentTask Verified by Installation ChecklistCreating a Site Log Console Port ConsiderationsConsole Port Connections Task Verified by DatePreparing to Install the Router Console Port Considerations OL-23778-01 Network Modules Installing the Cisco ASR 901 Mobile Wireless RouterMounting the Cisco ASR 901 Router Rack-Mounting Configuration GuidelinesMounting the Cisco ASR 901 Router in a Rack Attaching the Rack-Mounting BracketsRack-Mounting Brackets section on Attaching the Cable GuidesGrounding the Cisco ASR 901 Router Connecting the Chassis Ground and PowerGrounding Point Stripping a Ground Wire Power Connection Compliance6-Pin Terminal Block Wiring the DC-Input Power SourceInstalling SFP Modules Installing and Removing SFP ModulesRemoving SFP Modules Installing an SFP Module into an SFP Module SlotConnecting the Console Port Connecting CablesConsole Port Types of RJ-45 CablesConnecting T1 and E1 Interface Cables Connecting the Network CablesConnecting Gigabit Ethernet Interface Cables Connecting GPS Cables Connecting SFP CablesConnecting Cables to the Bits Interface Connecting to Alarm Port Powering On the RouterConnecting to the Management Ethernet Port Dressing Router CablesPower-On Procedure Checklist for Power UpFormatting Procedures for Flash Memory Interpreting Front-Panel LEDsCopying Files File and Directory ProceduresDisplaying Contents of the Flash Memory Deleting Files from the Flash Memory Displaying File ContentEnter a Directory and Determine the Current Directory What to Do After Installing the HardwareOL-23778-01 Problem Solving TroubleshootingSymptom Possible Cause Corrective Action Troubleshooting the Power and Cooling SystemsEnvironmental Reporting Features Information Packet publication Troubleshooting Cables, and ConnectionsChassis LEDs Reading the LEDsCopper GE from Quad combo PHY ports contain Two Leds each System LEDSFP Ethernet Interface LEDs T1/E1 Interface LEDsRJ-45 Ethernet Interface LEDs Color/State Description two LEDs for each T1/E1 portOL-23778-01 Gigabit Ethernet Connector Pinouts Cable SpecificationsT1/E1 Port Pinouts SFP Port Pinouts and Cable SpecificationsPin FE Signal GE Signal Pin Signal Name Direction Description Console Port Signals and PinoutsConsole Port Signals and Pinouts RJ-45-to-DB-9 Terminal Adapter Console Pin Signal Name HP Pins Direction DescriptionConsole RJ-45-to-DB-25 Port DTE Terminal Adapter Device Signal RJ-45 Pin DB-25 PinIdentifying a Rollover Cable GPS Port Pinouts Bits Port PinoutsTime of Day Pinouts Pin Signal Name Description Alarm Port PinoutsManagement Ethernet Port Pinouts 10 MhzRxDP RxDN TxDP Not connected TxDN Site Log Initials DateNumerics IN-2 IN-3 IN-4

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.
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