1 MANAGING AND MONITORING DHCP Chapter 2 2 MANAGING
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Transcript 1 MANAGING AND MONITORING DHCP Chapter 2 2 MANAGING
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Chapter 2
MANAGING AND
MONITORING DHCP
Chapter 2: MANAGING AND MONITORING DHCP
MANAGING DHCP:
COMMON DHCP ADMINISTRATIVE TASKS
Configure or modify scopes
Configure or modify options
Configure the DHCP relay agent
Back up the DHCP database
Restore the DHCP database
Compact the DHCP database
Reconcile DHCP scopes
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DNS DYNAMIC UPDATES
Allows client computers to dynamically update
resource records in DNS
Allows DHCP to dynamically update client computer
resource records
Chapter 2: MANAGING AND MONITORING DHCP
WHEN TO USE DYNAMIC UPDATES
When the DNS client operating system is not
Microsoft Windows 2000, Microsoft Windows XP,
or Microsoft Windows Server 2003
When assigning permissions that allow clients to
update their own records becomes unmanageable
When allowing individual clients to update records
presents a security risk
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Chapter 2: MANAGING AND MONITORING DHCP
DYNAMIC UPDATES WITH MICROSOFT
WINDOWS 2000 AND LATER CLIENTS
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Chapter 2: MANAGING AND MONITORING DHCP
DYNAMIC UPDATES WITH
PRE–WINDOWS 2000 CLIENTS
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Chapter 2: MANAGING AND MONITORING DHCP
CONFIGURING DHCP FOR DYNAMIC UPDATES
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Chapter 2: MANAGING AND MONITORING DHCP
SECURE DYNAMIC UPDATES
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TROUBLESHOOTING TIPS FOR DYNAMIC
UPDATES
Check the servers’ system Event Log for errors.
Use Ipconfig /registerdns to force a client to renew
DNS registration.
Ensure dynamic updates are properly enabled for
the zone on the DNS server.
Verify that clients’ preferred DNS server is the
primary DNS server for the zone.
Check the resource record access control list (ACL)
on the server. The ACL must allow dynamic updates.
Chapter 2: MANAGING AND MONITORING DHCP
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TROUBLESHOOTING TIPS FOR DYNAMIC
UPDATES (CONT.)
Verify that the system time on the DNS server and
the DNS client is synchronized.
Check the client UpdateSecurityLevel registry entry.
The registry entry could have been modified to
prevent dynamic updates.
Check to see whether the DNS zone is locked,
preventing updates.
Ensure that the client has permissions to update the
resource records.
Chapter 2: MANAGING AND MONITORING DHCP
MANAGEMENT OF A DHCP DATABASE
Back up and restore the database.
Reconcile the database.
Compact the database.
Enable server-based conflict detection.
Remove the database.
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BACKING UP AND RESTORING THE
DHCP SERVER
Microsoft Windows Server 2003 supports automatic
and manual backups of the DHCP database.
The DHCP database and registry entries are
automatically backed up every 60 minutes by
default.
If the original database is unable to load, when
DHCP starts it will automatically restore a backup
copy of the database.
A manual backup can be performed.
Manual backups can be used only with manual
restores.
Chapter 2: MANAGING AND MONITORING DHCP
RECONCILING A DHCP DATABASE USING THE
RECONCILE ALL SCOPES OPTION
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Chapter 2: MANAGING AND MONITORING DHCP
COMPACTING A DHCP DATABASE
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Chapter 2: MANAGING AND MONITORING DHCP
REMOVING A DHCP DATABASE
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BEST PRACTICES FOR MANAGING
A DHCP DATABASE
Manually back up the DHCP database to a location
other than the default location
%systemroot%\System32\Dhcp\Backup\Jet\New.
Maintain an offline copy of the backup.
Chapter 2: MANAGING AND MONITORING DHCP
MONITORING A DHCP DATABASE
Establish a baseline.
Gather DHCP data from the following locations:
DHCP console
DHCP audit log
Event Viewer
Performance console
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Chapter 2: MANAGING AND MONITORING DHCP
USING DHCP STATISTICS TO MONITOR
A DHCP SERVER
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Chapter 2: MANAGING AND MONITORING DHCP
MONITORING DHCP USING THE AUDIT
LOG FILES
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Chapter 2: MANAGING AND MONITORING DHCP
USING THE PERFORMANCE CONSOLE
TO MONITOR DHCP
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BEST PRACTICES FOR MONITORING DHCP
Create a baseline.
Check the standard counters for server performance.
Monitor the counter for DHCP performance.
Chapter 2: MANAGING AND MONITORING DHCP
AUTOMATIC PRIVATE IP ADDRESSING
When to disable Automatic Private IP Addressing
(APIPA)
Troubleshooting APIPA
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Chapter 2: MANAGING AND MONITORING DHCP
CHAPTER SUMMARY
DHCP can dynamically update DNS.
Dynamic updates can be secure.
You must monitor and manage DHCP.
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