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Defining the Management Domain
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Defining the Management Domain
by John Blommers
OpenView Network Node Manager: Designing and Implementing an Enterprise Solution
Copyright
Preface
Acknowledgements
List of Figures
List of Tables
Author Biography
The NNM Project Deployment Plan
Introduction
Determining the Requirements that NNM Must Satisfy
Sharing Project Plans and Information on a Web Site
Drafting, Defining, and Finalizing an Operations Agreement
Choosing Scalable Hardware at Each NNM Site
Setting the Scope and Conducting a Pilot Test
Identifying, Developing, or Buying NNM Training
Defining Management Domains
Planning for Ongoing Problem Resolution
Planning for System, Database, and Map Backup and Recovery
The Benefit of Using ITO for NNM System Management
The Value of Consultants, System Admins, and Project Managers
The Victory Celebration
Planning for Operational Patching and Upgrading
Planning a Robust Domain Name System
Introduction
Why DNS Is So Important to NNM
The History of /etc/hosts
Router Interfaces and DNS
Reliability Designs for DNS
The Purpose and Use of Delegation
Sample DNS Configuration Files
Loading Factors for DNS Systems
NNM Caching
Primary, Secondary, and Other Mysteries
The Bigger Picture of a DNS Implementation
Defining the Management Domain
Introduction
Determining the Communities of Interest in a Network
Geographic Regions and Business Relationships
Estimating the Size of a Management Domain
Strategies for Defining and Discovering the Management Domain
Configuration Files for Controlling the Management Domain
The Excitement of First Discovery
Introduction
Discovery Without a seedfile
Manually Guided Discovery
Discovery Guided by a seedfile
Demand Poll to Coax Along Discovery
The Curse of Multiple SNMP Community Strings
DNS Problems
Fine-Tuning the Discovery Filter
Tuning and Observing netmon Queues
My Window Is Full of Icons
Strategies for Containerizing the Internet Submap
Saving Map Customizations
Leveraging Lessons Learned With Other Map Builders
Map Management Strategies
Introduction
Where The Read/Write Map Is Displayed
Managing Map Customizations
Using Autolayout and Overlay Features
How NNM Uses the Repeater and Bridge MIBs
Third-Party Map Management Tools
Taking Screenshots of Maps
Special Types of Network Devices
Distributed Network Management
Introduction
The Management Station and Collection Station Relationship
Configuring the Collection Station
Deciding What Devices to Export
Management Station SNMP Data Collection
Monitoring NNM Systems With ITO and MeasureWare
Configuring the Management Station
Adding a Collection Station to an Operational Management Station
The Impact of Rebuilding a Collection Station
Configuration Management With NNM
Introduction
Nuggets in the Configuration Alarms Category
Gold in ovtopodump
Configuration Information Presented in NNM Maps
Interface Information
Creating Custom Menu Items
Event Management With NNM
Introduction
Managed vs. Unmanaged Devices
Traps From Expected and Unexpected Sources
syslog Streams from Devices and ovevent
Predefined and Custom Alarm Categories
Customizing Event Actions
Managing Event Histories and trapd.log
Reducing Event Storms with ECS
Performance Management with NNM
Introduction
Who Needs Performance Data?
Providing Data for an SLA
Determining Performance Data Retention Intervals
Estimating SNMP Data Sample Rates
The Heisenberg Uncertainty Principle of SNMP Polling
How Much Traffic Does NNM Create?
SNMP Performance Data in MIB2 and Private MIBs
Strategies for Setting Threshold Values
How to Create MIB Expressions
Viewing Performance Data Online
Presenting Performance Data to the Consumer
SNMPv2c and 64-bit Counters
Collecting RMON Data
Crossing Over into HP NetMetrix
Capacity Planning
Conclusion
Managing Firewall Environments With NNM
Introduction
Defining the DMZ Environment
Working With the Corporate Security Group
Special Security Configuration for UNIX in the DMZ
Firewalls and NNM Port Usage
Router Access Control Lists and NNM
Packet Filtering With a Router
Accessing NNM Remotely
Periodic Maintenance Tasks for NNM
Introduction
Using crontab Entries to Automate Backups
Determining the Scope of the Backup
Database Repairing
Moving Newly Discovered Devices to Their Proper Container
Backing Up Map Customizations
Updating MIBs for New Devices
Deleting Unwanted Maps
Reviewing Configuration Alarms
Perusing Log Files and Application Alarms
Reviewing MeasureWare Data
Perusing and Updating ITO Alarms
A Day With NNM
Introduction
Custom Performance Management
Testing an NNM Patch
Verifying Correct Menu Operation
Validating a New Procedure
Testing Third-Party Applications
Validating Operating System Changes
Conducting Directed Discovery
Creating a Special Purpose Map
NNM and Routers
Troubleshooting NNM
Introduction
Using Event Logs
Consulting the Map for Related Objects
Device Names Change Unexpectedly
Network Topology Autolayout Errors
DHCP Reassigns an IP address
Autodiscovery Blues
Detecting an Impending License Expiration
NNM GUI Problems on UNIX Systems
Cross-Platform Issues With NNM
Introduction
X-Windows Differences
Java Issues
Bandwidth and X-Windows
Printing With NNM
Staffing Issues for NNM
Introduction
Determining Users for the Read-Only Map
Who Are the Keepers of the Maps?
Who Creates MIB Applications?
Who Troubleshoots NNM Itself?
Who Resolves DNS Problems?
Who Resolves NNM Problems?
Who Performs System Administration?
Who Develops Custom Applications?
Best Practices for NNM
Introduction
Platform Sizing
ITO Manages the NNM Systems
Menu Management
Project Management
Dedicated System Administrator
NNM Case Studies
Introduction
A Global Manufacturing Company
A Natural Resource Company
A Bioengineering Company
A Local Vehicle Manufacturer
A Community College
A National Consulting Company
A Small Engineering Firm
A Worldwide Computer Company
Glossary
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The Bigger Picture of a DNS Implementation
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Introduction
Chapter 3. Defining the Management Domain
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