Interactive
Note:
This document does not cover any software
-
related failures
except for those that are often
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Hardware Troubleshooting for Cisco
TAC Notice:
Changing on TAC Web
What's
1700 Series Routers
: This document offers customized analysis of your
Cisco device.
Contents
Introduction
Prerequisites
Requirements
Components Used
Hardware-Software Compatibility and Memory Requirements
Error Messages
Conventions
Modules and Cards
DSP Optimization on the Cisco 1751 and Cisco 1760 Routers
WIC-1ENET Module
Identifying the Issue
Troubleshooting ISDN Interfaces
Troubleshooting Router Hangs
Troubleshooting Bus Error Crashes
Router Does Not Boot
Router Crashes
Watchdog Timeouts
Router Is Dropping Packets
Memory Leaks
Summary
Related Information
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Introduction
Valuable time and resources are often wasted replacing hardware that actually functions properly. This
document helps troubleshoot potential hardware issues with Cisco 1700 Series Routers, and can help
you identify which component may be causing a hardware failure, depending on the type of error that
the router is experiencing.
mistaken as hardware issues.
router, refer to the
Memory Requirements
section of
How to Choose
a Cisco IOS Software Release
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Prerequisites
Requirements
Readers of this document should be knowledgeable of the following:
1700 Series Hardware Installation Guide
Troubleshooting Router Crashes
1700 Series Router Technical Support Page
Components Used
The information in this document is based on the hardware versions below.
Cisco 1700 Series Routers
The information presented in this document was created from devices in a specific lab environment. All
of the devices used in this document started with a cleared (default) configuration. If you are working in
a live network, ensure that you understand the potential impact of any command before using it.
Hardware-Software Compatibility and Memory Requirements
Whenever you install a new card, module, or Cisco IOS® software image, it is important to verify that
the router has enough memory, and that the hardware and software are compatible with the features you
wish to use.
Perform the following recommended steps to check for hardware-software compatibility and memory
requirements:
registered customers only
1. Use the Software Advisor (
device.
Tips:
The Software Support for Hardware (
whether the modules and cards installed on the router are supported by the desired Cisco
IOS software version.
The Software Support for Features (
registered customers only
Cisco IOS software image needed by choosing the types of features you wish to implement.
registered customers only
2. Use the
IOS Upgrade Planner (
(RAM and Flash) required by the Cisco IOS software, and/or download the Cisco IOS software
image. To determine the amount of memory (RAM and Flash) installed on your
) tool to choose software for your network
registered customers only
) section helps you verify
) section helps you determine the
) to check the minimum amount of memory
running on your router,
MALLOCFAIL: Memory allocation of [dec] bytes failed from [hex],
supported:
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Tips:
If you want to keep the same features as the version that is currently
but don't know which feature set you are using, enter the
router and paste it into the Output Interpreter (
registered customers only
show version
command on your
) tool to find out. It is
important to check for feature support, especially if you plan to use recent software features.
If you need to upgrade the Cisco IOS software image to a new version or feature set, refer
to How to Choose a Cisco IOS Software Release for more information.
3. If you determine that a Cisco IOS software upgrade is required, follow the Software Installation
and Upgrade Procedure for the Cisco 1700 Series Router.
If your 1700 does not have a connection to the network or does not have a valid Cisco IOS
Tip:
software image, you may need to use the console port of the router to perform an
Xmodem
Console Download Procedure Using ROMmon. This procedure does not require the use of a
Trivial File Transfer Protocol (TFTP) server.
4. If the router does not boot after a Cisco IOS software upgrade, refer to the Router Does Not Boot
section of this document for more information.
Error Messages
The Error Message Decoder (
) tool allows you to check the meaning of an error
registered customers only
message. Error messages appear on the console of Cisco products, usually in the following form:
%XXX-n-YYYY : [text]
Here is an example error message:
Router# %SYS-2pool [chars], alignment [DEC]
Some error messages are informational only, while others indicate hardware or software failures and
require action. The Error Message Decoder (
registered customers only
) tool provides an explanation of the
message, a recommended action (if needed), and if available, a link to a document that provides
extensive troubleshooting information about that error message.
Conventions
For more information on document conventions, refer to the
Cisco Technical Tips Conventions.
Modules and Cards
The Cisco 1700 Series Routers include two WAN interface card slots. In addition, the Cisco 1750 and
Cisco 1751 routers include one Voice Interface Card (VIC) slot that can be used only for a voice
interface card. The Cisco 1760 router includes two VIC-only slots. However, not all Cisco WAN
Interface Cards (WICs), Voice Interface Cards (VICs), and Voice WAN Interface Cards (VWIC)s are
supported by the 1700 Series Router. The documents below can help you verify that the module/card is
Digital Signal Processor (DSP) resources among
Optimization on
How to Configure Cisco Devices for
hardware issues. It is
cycle
The complete bootup sequence if the router experiences boot errors.
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For WIC compatibility information, refer to the WIC Hardware Compatibility Matrix.
For VIC/VWIC compatibility information, refer to the Voice Hardware Compatibility Matrix.
DSP Optimization on the Cisco 1751 and Cisco 1760 Routers
To find software configuration information for changing the codec complexity of the analog
Voice Interface Cards (VICs) and optimizing the
the analog and BRI VICs on the Cisco 1751 and Cisco 1760 routers, refer to DSP
the Cisco 1751 and Cisco 1760 Routers.
The DSP Calculator tool (
registered customers only
) can help you determine the DSP requirements
for the Cisco 1751 and the Cisco 1760 routers, based on the interface modules selected and their
codec configurations. This tool supports Cisco IOS Software Releases 12.2(8) YN and later.
WIC-1ENET Module
The Cisco WIC-1ENET is a single-port Ethernet interface card supporting 10BASE-T Ethernet. The
card provides the Cisco 1700 Series Router with additional Ethernet interfaces.
The Cisco WIC-1ENET card is only supported on the Cisco 1700 series routers and requires Cisco IOS
Software Release 12.2(2)XJ or later if the card is installed in any WIC slot other than slot 0, or if more
than one card is installed. The card can be used with Cisco IOS Software Release 12.2(4)T, but the card
must be installed in slot 0, and only one Cisco WIC-1ENET card can be installed in the router.
For information on compatibility and hardware/software requirements for the Cisco WIC-1ENET card,
refer to
Cisco WIC-1ENET Requirements.
Identifying the Issue
This section explains what to do to determine the cause of the potential hardware issue(s).
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
Syslog section of Resource Manager Essentials and Syslog Analysis: How-To.
show technical-support
compilation of many different commands including
show stacks
. TAC engineers usually ask for this information to troubleshoot
important to collect the
command output - The
show technical-support
show technical-support
show version, show running-config
information before doing a reload or power-
as these actions can cause all information about the problem to be lost.
command is a
, and
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