Cisco 2600XM Series Przewodnik Instalacji Pobierz pdf (Strona 5)

Identifying the Issue

In order to determine the cause, the first step is to capture as much information about the problem as possible.

The following information is essential for determining the cause of the problem:

Console logs (for more information, refer to Applying Correct Terminal Emulator Settings for

Console Connections).

•

Syslog information − If the router is set up to send logs to a syslog server, you may be able to obtain

information on what happened. For details, refer to the How to Configure Cisco Devices for Syslog

section of Resource Manager Essentials and Syslog Analysis: How−To.

•

show technical−support command output − The show technical−support command is a

compilation of many different commands including show version, show running−config, and show

stacks. TAC engineers usually ask for this information to troubleshoot hardware issues. It is

important to collect the show technical−support information before doing a reload or power−cycle

as these actions can cause all information about the problem to be lost.

•

Complete bootup sequence if the router experiences boot errors.•

If you have the output of a show command from your Cisco device (including show technical−support), you

can use the Output Interpreter (

registered customers only

) to display potential issues and fixes. To use the

Output Interpreter (

registered customers only

) , you must be logged in and have JavaScript enabled.

Troubleshooting Serial Interfaces

Here is a list of references to use for troubleshooting serial interfaces:

T1 Troubleshooting Flowchart•

Troubleshooting Serial Lines•

Loopback Tests for T1/56K Lines•

Troubleshooting ISDN Interfaces

Here is a list of references to use for troubleshooting ISDN interfaces:

Troubleshooting ISDN Layer 1•

Troubleshooting ISDN Layer 2•

Troubleshooting ISDN Layer 3•

Troubleshooting Memory Problems

If a 2600 router does not have enough memory, this can result in boot errors or other issues such as

%SYS−2−MALLOCFAIL: Memory Allocation Failure errors. To make sure that your router has the

minimum required amount of memory, use the 2600/3600/3700 Memory Calculator (

registered customers only

) .

This tool allows you to determine whether or not your router has enough memory to function correctly.

Refer to the Identifying a Continuous/Boot Loop Due to a Wrong Iomem Size section to recover from this

type of memory problem.

Troubleshooting Router Hangs

A 2600 Series Router may experience a router hang. A hang is when the router boots to a certain point and

then no longer accepts any commands or keystrokes. In other words, the console screen hangs after a certain

Cisco − Hardware Troubleshooting for the Cisco 2600 Series Router

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