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© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-1
Automating IP Address Assignment
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-2
Overview
Overview of DHCP
Installing the DHCP Service
Authorizing the DHCP Service
Creating and Configuring a Scope
Customizing DHCP Functionality
Configuring DHCP in a Routed Network
Supporting DHCP
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-3
• Overview of DHCP
Manual vs. Automatic TCP/IP Configuration
DHCP Operation
The DHCP Lease Generation Process
The DHCP Lease Renewal Process
Requirements for DHCP Servers and Clients
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-4
Manual vs. Automatic TCP/IP Configuration
Disadvantages
Manual TCP/IP ConfigurationManual TCP/IP ConfigurationManual TCP/IP ConfigurationManual TCP/IP Configuration Automatic TCP/IP ConfigurationAutomatic TCP/IP ConfigurationAutomatic TCP/IP ConfigurationAutomatic TCP/IP Configuration
Advantages
IP addresses entered manually on each client computer
Possibility of entering incorrect or invalid IP address
Incorrect configuration can lead to communication and network problems
Administrative overload on networks where computers are frequently moved
IP addresses are supplied automatically to client computers
Ensures that clients always use correct configuration information
Elimination of common source of network problems
Client configuration updated automatically to reflect changes in network structure
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-5
DHCP Operation
IP Address1IP Address2IP Address3
DHCPDHCPDatabaseDatabase
IP Address2
IP Address1
DHCP Client:IP configuration
fromDHCP server
DHCP Server
Non-DHCP Client:static IP
configuration
DHCP Client:IP configuration
from DHCP server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-6
The DHCP Lease Generation Process
DHCP ServersDHCP Client
1111 IP Lease RequestIP Lease Request
3333 IP Lease SelectionIP Lease Selection
2222IP Lease OfferIP Lease Offer
4444IP Lease Acknowledgement
IP Lease Acknowledgement
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-7
The DHCP Lease Renewal Process
DHCPREQUESTDHCPREQUESTDHCPREQUESTDHCPREQUEST
Source IP Address = 192.168.0.77Dest. IP Address = 192.168.0.108Requested IP Address = 192.168.0.77Hardware Address = 08004....
Source IP Address = 192.168.0.77Dest. IP Address = 192.168.0.108Requested IP Address = 192.168.0.77Hardware Address = 08004....
DHCPACKDHCPACK
Source IP Address = 192.168.0.108Dest. IP Address = 192.168.0.77Offered IP Address = 192.168.0.77 Client Hardware Address = 08004...Subnet Mask = 255.255.255.0Length of Lease = 8 daysServer Identifier = 192.168.0.108DHCP Option: Router = 192.168.0.1
Source IP Address = 192.168.0.108Dest. IP Address = 192.168.0.77Offered IP Address = 192.168.0.77 Client Hardware Address = 08004...Subnet Mask = 255.255.255.0Length of Lease = 8 daysServer Identifier = 192.168.0.108DHCP Option: Router = 192.168.0.1
DHCP Client DHCP Server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-8
Requirements for DHCP Servers and Clients
DHCP Server Requirements (Windows 2000 Server)• The DHCP service• Static IP address, subnet mask, default gateway• Range of valid IP addresses
DHCP Clients• Windows 2000 Professional or Windows 2000 Server• Windows NT Server or Workstation 3.51 or later• Windows 95 or Windows 98• Windows for Workgroups 3.11, running TCP/IP- 32• Microsoft Network Client 3.0 for MS-DOS• LAN Manager 2.2c• Non-Microsoft operating systems
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-9
Installing the DHCP Service
Networking Services
To add or remove a component, click the check box. A shaded box means that only part of the component will be installed. To see what’s included in a component, click Details.
Subcomponents of Networking Services:
0.8 MB
Description:
Total disk space required:
Space available on disk:
0.9 MB
912.4 MB
Details...Details...
OK Cancel
Enables a network connected to the Internet to automatically assign a temporary IP address to a host when the host connects to the network.
COM Internet Services Proxy 0.0 MB
Domain Name System (DNS) 0.0 MB
Dynamic Host Configuration Protocol (DHCP) 0.0 MB
Internet Authentication Service 0.0 MB
QoS Admission Control Service 0.0 MB
Simple TCP/IP Services 0.0 MB
Site Server LDAP Services 1.8 MB
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-10
Authorizing the DHCP Service
If unauthorized, the service logs an error and will notrespond to clients
If authorized, the service starts properly DHCP Service DHCP Service
Checks For Checks For AuthorizationAuthorization
Clients DHCP Server
Domain Controller/DHCP server
DHCP Server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-11
Lab A: Creating and Authorizing a DHCP Server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-12
• Creating and Configuring a Scope
Overview of Scopes
Using The New Scope Wizard
Configuring a Scope with Options
Customizing the Use of Scope Options
Reserving IP Addresses for Client Computers
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-13
Overview of Scopes
ScopeScopeScopeScope
192.168.1.0192.168.1.1192.168.1.2192.168.1.3192.168.1.4
IP Addresses Available for Lease to Client Computers
DHCP Server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-14
Using the New Scope Wizard
You use the New Scope Wizard to:• Configure scope parameters
• Change the default lease duration
• Activate a scope
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-15
Configuring a Scope with Options
Scope Options Supported by DHCP Include:• IP Address of a Router
• IP Address of a DNS Server
• DNS Domain Name
• IP Address of a WINS Server
• Type of NetBIOS over TCP/IP Name Resolution
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-16
Customizing the Use of Scope Options
Scope OptionsScope Options
Reserved Client LevelReserved Client Level
Server LevelServer Level
Scope LevelScope Level
Class LevelClass Level
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-17
Reserving IP Addresses for Client Computers
New Reservation
Provide information for a reserved client.
Reservation name:
IP address:
MAC address:
Description:
Supported types
Both
DHCP only
BOOTP only
Add Close
Stuttgart Server
192 . 168 . 1 . 201
DHCP Reservation for Server
00a024e2b01a
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-18
Lab B: Configuring a DHCP Scope
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-19
Customizing DHCP Functionality
Using Option Classes
Combining Scopes by Using Superscopes
Issuing Multicast Addresses by Using Multicast Scopes
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-20
Using Option Classes
Client1
Client2
Client3DHCPServer
Configuration AConfiguration A
Configuration BConfiguration B
Configuration CConfiguration C
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-21
Combining Scopes by Using Superscopes
SuperscopeASuperscopeA
Scope1192.168.1.1
192.168.1.254
Scope1192.168.1.1
192.168.1.254
DHCPServer
192.168.1.1192.168.1.1 192.168.1.254192.168.1.254 192.168. 2.1192.168. 2.1 192.168. 2.254192.168. 2.254
Scope2192.168.2.1
192.168.2.254
Scope2192.168.2.1
192.168.2.254
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-22
Issuing Multicast Addresses by Using Multicast Scopes
Computer2
Computer3
Computer4
Computer1
MulticastGroup
DHCP Server
Request for Request for Multicast AddressMulticast Address
Request for Request for Multicast AddressMulticast Address
Multicast Multicast Address AssignedAddress AssignedMulticast Multicast Address AssignedAddress Assigned
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-23
• Configuring DHCP in a Routed Network
Routed Network Configuration Options
Using a DHCP Relay Agent
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-24
Routed Network Configuration Options
DHCP Client
DHCP Client
Non RFCCompliant
RouterRouter RouterRouter
RFCCompliant
Windows 2000 Server
DHCPDHCPRelayRelayAgentAgent
DHCP Server
Broadcast
Broadcast
DHCP Client
Windows 2000 Server
DHCP Client
Non RFCCompliant
RouterRouter
DHCP Server
Router
RFCCompliant
DHCPDHCPRelayRelayAgentAgent
Broadcast
Broadcast
DHCP Client
DHCP Client
Non RFCCompliant
Router
DHCP ServerWindows 2000
Server
DHCPRelayAgent
RouterRouter
RFCCompliant
DHCP Client
DHCP Client
Non RFCCompliant
RouterRouter RouterRouter
RFCCompliant
Windows 2000 Server
DHCPDHCPRelayRelayAgentAgent
DHCP Server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-25
Using a DHCP Relay Agent
Broadcast
Broadcast
DHCP client broadcasts a DHCP message
RouterRouter
Subnet 1
Subnet 2
DHCP relay agent detects the broadcast and sends the message to the DHCP server
DHCP relay agent receives reply from the DCHP server and sends a broadcast
DHCP Client
DHCP Relay Agent DHCP Server
DHCP client receives the broadcast
Broadcast
RouterRouter
Subnet 1
Subnet 2
DHCP Client
DHCP Relay Agent DHCP Server
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-26
Supporting DHCP
Monitoring the DHCP Server Service
Troubleshooting DHCP Database Problems
Removing a DHCP Server from Service
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-27
Monitoring The DHCP Server Service
When You Enable Logging, the DHCP Server Creates Log Files Called DhcpSrvLog.xxx. The DHCP ServerStores These Files in the DHCP Database Directory
Dhcp
DHCPDatabase
DHCPDatabase
SrvLog
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-28
Troubleshooting DHCP Database Problems
DHCPDatabase systemroot\system32\dhcpStoredStoredStoredStored
systemroot\system32\dhcp\backup\jet\newBackupBackup
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-29
Removing a DHCP Server from Service
Before Removing a DHCP Server from ServiceBefore Removing a DHCP Server from ServiceBefore Removing a DHCP Server from ServiceBefore Removing a DHCP Server from Service
Set short lease durations for clients
Ensure new lease for clients
Record any reserved addresses
Large address pool in other DHCP servers
Transfer IP address to the new scope
© 2003, cdaga tech, Inc. All rights reserved. Course acronym #-30
Review
Overview of DHCP
Requirements for DHCP Servers and Clients
Installing the DHCP Service
Authorizing the DHCP Service
Creating and Configuring a Scope
Customizing DHCP Functionality
Supporting DHCP