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Module 6: Managing and Monitoring Domain Name System (DNS)

Module 6: Managing and Monitoring Domain Name System (DNS). Overview. Configuring the Time-to-Live Value Configuring Aging and Scavenging Integrating DNS with WINS Testing the DNS Server Configuration Verifying that a Resource Record Exists by Using Nslookup, DNSCmd, and DNSLint

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Module 6: Managing and Monitoring Domain Name System (DNS)

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  1. Module 6: Managing and Monitoring Domain Name System (DNS)

  2. Overview • Configuring the Time-to-Live Value • Configuring Aging and Scavenging • Integrating DNS with WINS • Testing the DNS Server Configuration • Verifying that a Resource Record Exists by Using Nslookup, DNSCmd, and DNSLint • Monitoring DNS Server Performance

  3. Lesson: Configuring the Time-to-Live Value • How the Time-to-Live Value Works • How to Configure the Time-to-Live Value

  4. The records in the zone are sent to other DNS servers and clients in response to queries 1 DNS servers and DNS clients that store the record in their cache hold the record for the TTL period supplied in the record 2 When the TTL expires, the record is removed from the cache 3 How the Time-to-Live Value Works The Time-to-Live (TTL) value is a time-out value expressed in seconds that is included with DNS records that are returned in a DNS query  Resource Record Resource Record Zone Cache Cache Authoritative DNS Server2 DNS Server1 TTL set on the zone DNS Client

  5. How to Configure the Time-to-Live Value Your instructor will demonstrate how to: • Adjust the TTL value for a zone • Adjust the TTL value for a resource record

  6. Practice: Configuring the Time-to-Live Value In this practice, you will configure the TTL value

  7. Lesson: Configuring Aging and Scavenging • What Are Aging and Scavenging Parameters? • How Aging and Scavenging Work • How to Configure Aging and Scavenging

  8. What Are Aging and Scavenging Parameters? Aging is the process that determines whether a stale DNS resource record should be removed from the DNS database Scavenging is the process of cleaning and removing outdated or extinct names data from the WINS database A refresh attempt is the process of a computer requesting a refresh on its DNS record

  9. How Aging and Scavenging Works 7-days 7-days Jan 1 Jan 8 Jan 15 Refresh interval No-Refresh interval Time stamped Scavenge Aging

  10. How to Configure Aging and Scavenging Your instructor will demonstrate how to: • Set aging/scavenging parameters for the DNS server • Set aging/scavenging parameters on a DNS zone • Enable automatic scavenging of stale resource records on a DNS server • Start immediate scavenging of stale resource records • View when a zone can start scavenging stale resource records • Configure the time stamp on a DNS resource record • View the time stamp on a dynamic resource record

  11. Practice: Configure Aging and Scavenging In this practice, you will configure aging and scavenging

  12. Lesson: Integrating DNS and WINS • Multimedia: DNS and WINS Integration • How to Integrate DNS with WINS

  13. Multimedia: DNS and WINS Integration • The objective of this presentation is to explain how DNS and WINS can be integrated in the network infrastructure • At the end of this presentation, you will be able to: • Define DNS and WINS integration • Explain how host names and NetBIOS names fit into DNS and WINS integration • Describe how DNS and WINS integration works

  14. How to Integrate DNS with WINS Your instructor will demonstrate how to integrate DNS with WINS

  15. Practice: Integrating DNS with WINS In this practice, you will integrate DNS with WINS

  16. Lesson: Testing the DNS Server Configuration • How Simple and Recursive Queries Work • How to Test the DNS Server Configuration

  17. How Simple and Recursive Queries Work A simple query is a query that performs a local test by using the DNS client to query the DNS server A recursive query is a query that tests a DNS server by forwarding a recursive query to another DNS server DNS Server DNS Root Server DNS Service Authoritative zone: training.nwtraders.msft DNS Client Resolver

  18. How to Test the DNS Server Configuration Your instructor will demonstrate how to: • Manually test a simple query on the DNS server • Manually test a recursive query on the DNS server • Enable automatic query testing on the DNS server

  19. Practice: Testing the DNS Server Configuration In this practice, you will test the DNS server configuration

  20. Lesson: Verifying that a Resource Record Exists by Using Nslookup, DNSCmd, and DNSLint • Why Verify that a Resource Record Exists? • Nslookup • DNSCmd • DNSLint • How to Verify that a Resource Record Exists by Using Nslookup, DNSCmd, and DNSLint

  21. To identify issues with your DNS solution, you can verify: • Missing records • Incomplete records • Incorrectly configured records You can use the following three utilities to monitor DNS: • Nslookup • DNSCmd • DNSLint Why Verify that a Resource Record Exists?

  22. Nslookup Nslookup is a command-line utility used to diagnose DNS infrastructure

  23. DNSCmd DNSCmd is a DNS support tool which allows you to complete many DNS administrative tasks on the DNS server from a command prompt

  24. DNSLint DNSLint is a Microsoft Windows utility that can run a series of queries to help diagnose common DNS name resolution issues

  25. How to Verify that a Resource Record Exists by Using Nslookup, DNSCmd, and DNSLint Your instructor will demonstrate how to: • Verify that a resource record exists in DNS by using Nslookup • Install DNSCmd • Display a complete list of zones configured on a DNS server, by using DNSCmd • Display information about a specific zone that is configured on a DNS server, by using the DNSCMD • Create a DNSLint report

  26. Practice: Verifying that a Resource Record Exists by Using Nslookup, DNSCmd, and DNSLint In this practice, you will verify that a resource record exists by using Nslookup, DNSCmd, and DNSLint

  27. Lesson: Monitoring DNS Server Performance • Guidelines for Monitoring DNS Server Performance by Using the Performance Console • What Is a DNS Event Log? • What Is DNS Debug Logging? • How to Monitor DNS Server Performance by Using Logging

  28. Guidelines for Monitoring DNS Server Performance by Using the Performance Console

  29. What Is a DNS Event Log? A DNS event log is a system log configured to log only DNS events

  30. What Is DNS Debug Logging? DNS debug logging is an optional logging tool for DNS that stores the DNS information that you select Primary DNS Server1 Secondary DNS Server2

  31. How to Monitor DNS Server Performance by Using Logging Your instructor will demonstrate how to: • Enable and configure debug logging options on the DNS server • View a DNS server debug log file • View the DNS server event log located on another computer

  32. Practice: Monitoring DNS Server Performance In this practice, you will monitor DNS server performance

  33. Lab A: Managing and Monitoring DNS In this lab, you will manage and monitor DNS

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