Course 2277C: Implementing, managing, and maintaining a Microsoft Windows Server 2003 network infrastructure: Network services - Module 6

Chia sẻ: Nothing Nothing | Ngày: | Loại File: PPT | Số trang:20

Thêm vào BST

Báo xấu

42
lượt xem 3
download

Download Vui lòng tải xuống để xem tài liệu đầy đủ

Module 6: Managing and monitoring domain name system. This module provides you with the knowledge and skills to manage and monitor DNS servers to ensure that they are functioning properly and to optimize network performance.

Chủ đề:

Bình luận(0) Đăng nhập để gửi bình luận!

Lưu

Nội dung Text: Course 2277C: Implementing, managing, and maintaining a Microsoft Windows Server 2003 network infrastructure: Network services - Module 6

Module 6: Managing and Monitoring Domain Name System
Overview • Managing DNS Records • Testing the DNS Server Configuration • Monitoring DNS Server Performance
Lesson: Managing DNS Records • What Is the Time to Live? • What Are Aging and Scavenging Parameters? • How Aging and Scavenging Work • Practice: Managing DNS Records
What Is the Time to Live? The Time to Live value indicates how long a record should be cached Resource Record Resource Record Cach Cach Zone e e Authoritative DNS Client DNS Server1 DNS Server2 TTL set on the zone The records in the zone are sent to other DNS 1 servers and clients in response to queries Records are cached based on the TTL period 2 supplied in the record When the TTL expires, the record is removed from 3 the cache
What Are Aging and Scavenging Parameters? Aging determines when a stale record should be removed from the DNS database Scavenging removes outdated or extinct names from the database A refresh attempt is the process of a computer renewing its DNS record Parameter Description Example No-Refresh DNS server does not 7 days Interval accept refresh attempts (default) Refresh DNS server does accept 7 days Interval refresh attempts (default)
How Aging and Scavenging Work 7 days 7 days Jan 1 Jan 8 Jan 15 Time No- Refresh Scaven stamp Refresh Interval ge Interval Aging
Practice: Managing DNS Records In this practice, you will: • Modify the default TTL for a zone • Modify the TTL for a record • Configure aging and scavenging
Lesson: Testing the DNS Server Configuration • What Are Simple and Recursive Queries? • Why Verify That a Resource Record Exists? • What Is Nslookup? • What Is Dnscmd? • What Is Dnslint? • Practice: Testing the DNS Server Configuration
What Are Simple and Recursive Queries? A simple query performs a local test by using the DNS client to query the DNS server A recursive query 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
Why Verify That a Resource Record Exists? To identify problems with your DNS solution, you can verify: Missing records Incomplete records Incorrectly configured records You can use the following three tools to monitor DNS: Nslookup Dnscmd Dnslint
What Is Nslookup? Nslookup is a command-line tool used to diagnose DNS infrast
What Is Dnscmd? Dnscmd allows you to complete many DNS administrative tasks from the command prompt
What Is Dnslint? The Dnslint tool can run a series of queries to help diagnose common DNS name resolution problems
Practice: Testing the DNS Server Configuration In this practice, you will: • Test DNS using a simple and recursive query • Verify records by using Nslookup • View DNS zone information by using Dnscmd • Test DNS by using Dnslint
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? • Practice: Monitoring DNS Server Performance
Guidelines for Monitoring DNS Server Performance by Using the Performance Console What to look for after a Performance baseline counter is established Dynamic Update Any increase over the baseline may Rejected be cause for further investigation Recursive If this counter goes dramatically up or down, it should be further Queries/sec investigated AXFR Request If this counter dramatically increases or decreases, it should be Sent investigated
What Is a DNS Event Log? A DNS event log is configured to log only DNS events
What Is DNS Debug Logging? DNS debug logging allows for detailed DNS statistics and information to be gathered Primary DNS Server1 Secondary DNS Server2
Practice: Monitoring DNS Server Performance In this practice, you will: • Monitor DNS by using the Performance console • Monitor DNS by using event logs • Configure DNS debug logging
Lab: Managing and Monitoring DNS In this lab, you will: • Test simple and recursive queries • Verify SOA records by using Nslookup • Use Dnslint to verify name server records • View performance statistics by using the Performance console • Verify DNS replication