The Bigger Picture of a DNS Implementation
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
- 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
- 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
- Event Management With NNM
- 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
- 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
- Troubleshooting NNM
- Cross-Platform Issues With NNM
- Staffing Issues for NNM
- Best Practices for NNM
- NNM Case Studies
- Glossary
The Bigger Picture of a DNS Implementation
This section sums up the relationship among the various architectural elements of a DNS implementation.
Figure 2-8. The big picture of DNS.
An NNM system is configured with a caching-only name server and refers to the two master servers in the north.acme.com zone. These in turn refer to the two root name servers that are configured with the authority records that point to the six name servers.
-
No Comment
..................Content has been hidden....................
You can't read the all page of ebook, please click here login for view all page.