Specifications

3-24
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 3 Commissioning the Cisco AS5800 Hardware
Configuring Cisco IOS Basics
Whenever memory cannot be allocated to a process request (a memory leak), a console error message
appears:
Sep 14 11:30:33.339 EDT: %SYS-2-MALLOCFAIL: Memory allocation of 19960
bytes failed from 0x603D530C, pool Processor, alignment 0
-Process= "Exec", ipl= 0, pid= 48
-Traceback= 603D8610 603DAA70 603D5314 603D5AF0 60373054 60371474 603C33DC
603C3538 603C4378 60371934 603586B8 60358A10 6037C12C 6037C1E4 60372E9C
6037EDEC
To identify the problem, inspect the first few output lines of the
show memory summary
command and
show processor memory
command. At times, the Cisco IOS causes memory leaks. Whenever this
happens, the Cisco TAC:
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Further investigates the problem

Finds out which sub-routine is causing the leak

Suggests an Cisco IOS upgrade
Task 2. Configuring Cisco IOS Basics
Apply a basic-running configuration to the NAS:
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2.1 Configuring the Host Name, Enable Secret, and Time Stamps
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2.2 Configuring Local AAA Security
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2.3 Setting Up a Login Banner
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2.4 Configuring Basic IP
Tech Tip
Periodically save the configuration by using the
copy running-config startup-config
command.
2.1 Configuring the Host Name, Enable Secret, and Time Stamps
Assign a host name to the NAS, specify an enable secret password, and turn on time stamps:
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A host name allows you to distinguish between different network devices.

A secret enable password allows you to prevent unauthorized configuration changes.
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Encrypted passwords in the configuration file add greater security to the NAS.

Time stamps help you trace debug output for testing connections. Not knowing exactly when an
event occurs hinders you from examining background processes.
Step 1
Enter the following commands in global configuration mode:
hostname 5800-NAS
enable secret yourpasswordhere
service password-encryption
service timestamps debug datetime msec
service timestamps log datetime msec