Windows Server 2008 Network Infrastructure Configuration (MCTS)

1. Mahmmoud A. Mahdi

2. Deploying a DHCP Server

3. Practice 1

4.  In this exercise you will add the DHCP
Server role on Dcsrv1.
1. Log on to Nwraders from Dcsrv1.
2. In the Initial Configuration Tasks window (or
Server Manager), click Add Roles.
▪ The Add Roles Wizard opens.
3. On the Before You Begin page, click Next.
4. On the select Server Roles page, select the
DHCP Server check box.

5. 5. On the Select Server Roles page, click Next.
6. On the DHCP Server page, read all of the text on
the page, and then click Next.
7. On the Select Network Connection Bindings page,
read all of the text on the page.
▪ Then, verify that the check box next to 192.168.0.1 is
selected and click Next.
8. On the Specify IPv4 DNS Server Settings page, read
all of the text on the page.
▪ Then, verify that nwtraders.msft is specified as the
parent domain and that 192.168.0.1 is specified as the
preferred DNS server IPv4 address. Click Next.

6. 9. On the specify IPv4 WINS Server Setting page.
▪ Then, leave the selection specifying that WINS is not required for
applications on the network and click Next.
10. On the Add Or Edit DHCP Scopes page, read all of the text
on the page, and then click Add.
▪ The Add Scope dialog box appears.
11. Use the following information to complete the fields in the
Add Scope dialog box:
▪ Scope Name: Nwtraders.msft IPv4
▪ Starting IP Address: 192.168.0.20
▪ Ending IP Address: 192.168.0.254
▪ Subnet Mask: 255.255.255.0
▪ Default Gateway(optional): 192.168.0.1
▪ Subnet Type: Wired (lease duration will be six days)
▪ Activate this scope: Enabled

7. 12. After you have entered the appropriate values in
the Add Scope dialog box, click OK
13. On the Add Or Edit DHCP Scopes page, click Next.
14. On the Configure DHCPv6 Stateless Mode page,
read all of the text on the page.
▪ Then, leave the Enable DHCPv6 Stateless Mode For This
Server option selected and click Next.
15. On the Specify IPv6 DNS Server Setting page, read
all of the text on the page.
▪ Then verify Then, verify that nwtraders.msft is specified
as the parent domain and that fd00::1 is specified as the
preferred DNS Server IPv6 address. Click Next.

8. 16. On the Authorize DHCP Server page, read all of
the text on the page.
▪ Then verify that the Use Current Credentials option
is selected and click Next.
17. On the Confirm Installation Selection page,
review the selections, and then click Install.
▪ When the installation completes, the Installation
Results page appears.
18. On the Installation Results page, click Close.

9. Practice 2

10.  In this exercise, you will configure the
Boston computer as a DHCP client for IPv4.
1. Log on to Nwtraders from Boston computer as
a domain administrator.
2. Open an elevated command prompt.
3. At the command prompt, type the following:
▪ netsh interface ipv4 set address “local area
connection” dhcp

11. 4. After the command prompt completes successfully
and the prompt reappears, type the following:
▪ netsh interface ipv4 set dnsserver “local area
connection” dhcp
5. After the command prompt completes successfully
and the prompt reappears, type ipconfig/all.
▪ The Ipconfig output shows that DHCP is enabled and
that Boston has received a new IP address 192.168.0.20.
6. Log off both computers.

12. Configuring a DHCP Sever

13.  After this lesson, you will be able to:
 Create scope reservations.
 Create scope exclusions.
 Configure DHCP scope options.

14.  After you add the DHCP Server role, you can
perform further configuration tasks by
using the DHCP console.
 These tasks include:
1. Configuring exclusions.
2. Creating address reservations.
3. Adjusting the lease duration of a scope
4. Configuring additional scope or server options.

15.  An exclusion range is a set of one or more IP
addresses that is included within the rang of a
defined scope but that you do not want to lease
to DHCP clients.
 For example:
 define a new scope whose address range is
192.168.0.10-192.168.0.254.
▪ You might have a number of preexisting servers whose
static addresses might lie within this range-for example
between 192.168.0.200 and 129.168.0.210.
▪ You might have servers with isolated static addresses, such
as 192.168.0.99

16.  To add an exclusion range:
1. In the DHCP console tree navigate to DHCP
<server node> IPv4 ScopeAddress Pool.
2. Right-click the Address Pool folder.
3. Choose New Exclusion Range.

18. 4. In the Add Exclusion dialog box that opens,
configure the range of addresses that you want
to exclude from the address rang.
▪ If you want to exclude a single address, specify the
Start IP Address and the End IP Address as the
same address

19. Adding an exclusion range

20.  Use a reservation to create a permanent address
lease assignment by the DHCP server by associating
an IP address with a MAC address.
 Ensure that a specified hardware device on the
subnet can always use the same IP address without
relying on a manually configured address.
 The advantage of a reservation
 Is that it is centrally managed and less likely to be
configured incorrectly.
 The disadvantage of a reservation
 Is that it is address is assigned late in the boot
process and depends on the presence of a DHCP
server.

21.  To create a reservation in the DHCP console
tree
1. Navigate to DHCP server node IPv4 Scope
Reservation.
2. Right-click the Reservation folder.
3. And then choose New Reservation.
4. In the New Reservation dialog box that opens,
specify a name, IP address, and MAC address for
the reservation.

24.  You can modify the lease duration to be
used for assigning IP address leases.
 To adjust the length of lease duration:
1. Open the properties of the scope whose lease
duration you want to adjust.
2. You can adjust the lease duration in the General
tab in the Lease Duration For DHCP Clients
area.

26.  In the DHCP console:
 if you want to end the lease for a given address
or a client, you can simply delete that lease by
right-clicking the lease and choosing Delete.

27. 1. The server level:
 Are inherited by all scopes configured on the
server.
2. The scope level:
 Are inherited by all leases and reservations
within the scope.
3. The reservation level:
 Apply to that reservation only.

28.  To see the built-in options that you can
configure:
1. In the DHCP console navigate to DHCPServer
nodeIPv4ScopeScope options.
2. Right-click the Scope Options folder.
3. And then choose Configure Options.
4. Then use the Scope Options dialog box to
choose an option for the scope.

31.  On the 70-642 exam you won’t be tasted on
any DHCP options beyond those covered in
the section entitled “Understanding DHCP
Options”.
 However, browsing the long list of options
made available through the DHCP console
helps you get a feel for what DHCP options
are and how you might use them in a
production environment.

32.  An option class is a client category that enables
the DHCP server to assign options only to
particular clients within a scope.
 Options classes can be of two types:
1. Vendor classes: are used to assign vendor-specific
options to DHCP clients identified as a vendor type.
▪ For example: you can configure clients that can be
identified as running Windows 2000 to enable or disable
NetBIOS.
2. User classes: are used to assign options to any set
of clients identified as sharing a common need for
similar DHCP options configuring.

33.  What is the default user class?
 It is a class to which all DHCP clients belong and
the class in which all options are created by
default.

34.  User classes enable you to apply a particular
configuration of DHCP options to any subset of DHCP
clients you define.
 To implement a user class:
1. Define the class at the DHCP server by assigning an ID and a
set of options for the class.
2. Assign selected client computers to that class by using the
Ipconfig/ setclassid command.
 A custom user class is helpful when you need to assign
distinct options to distinct sets of client computers.
 For example, your network might require certain clients to
be assigned a special default gateway that allows them to
bypass the company firewall.

35.  To create a custom or new user class:
1. Begin by right-clicking the IPv4 icon in the DHCP console
and choosing Define User Classes.
2. This step opens the DHCP User Classes .in this dialog box you
can see that three user classes are predefined:
a) Default Routing And Remote Access Class.
b) Default Network Access Protection Class.
c) Default BOOTP Class.
▪ Beyond these three, the Default user class is the implicit class to
which all clients belong by default.
3. You can create a new user class by clicking the Add button in
the DHCP User Classes dialog box. This step opens the new
class dialog box.
4. In this dialog box, you merely need to name the class and
then set an ID string of your choice for the class.

39. 5. After defining a new class and specifying an ID string for that
class , the new user class appears in the User Class drop-
down list box in the Advanced Tap of the Scope Options
dialog box.
6. You can then select that user class and define a set of options
that will be assigned only to members of the class.
7. Finally, you need to populate the class, for the desired
computers to inherit the options defined for the new class,
you need to set the class ID of appropriate client computers
to match the ID you have defined for that class at the DHCP
server.
▪ You can do this by executing the Ipconfig/setclassid command at a
command prompt at each client computer.
ipconfig/setclassid “local area connection” sample ID

40. 8. After you run this command on a DHCP client,
the client will inherit the options defined for
the class in addition to the options defined for
the default user class. If the two options
conflict , such as with the definition of a
default gateway, the option defined for the
more specific class takes precedence over the
setting defined for the Default User Class.

42.  To configure a DHCP server on a Server Core
installation of windows 2008:
 Install the DHCP server role by typing the following
command:
start/w ocsetup DHCPServerCore
▪ Even though this command installs the DHCP Server service, it
dose not automatically start.
 To start the service for the first time, use the following
command:
net start dhcpserver
 To configure the DHCP Service to start automatically,
type the following command:
sc config dhcpserver start= auto

43.  To add scopes and configure the server, you can
simply connect to the server from the DHCP
console on a computer running a full installation of
Windows Server 2008.
 If you want to configure a Server Core installation as a
DHCP client for IPv4,type the following command
where “local area connection” is the name of the
connection on the network:
netsh interface ipv4 set address “local area connection” dhcp
 To configure the server to obtain a DNS server
address through DHCP, type the following
command:
netsh interface ipv4 set dnsserver “local area connection” dhcp

44.  When you configure DHCP options for the
Default User class, which clients are
assigned these options?
 Quick Check Answer:
 All clients, except when a client is assigned a
class-specific option that conflicts with an
option defined for the Default User class. In this
case the class-specific options takes precedence.

45. Practice 3

46.  Exercise 1: Creating an Exclusion Range
 In this exercise, you will create an exclusion range
on Dcsrv1 for the address range 192.168.0.200-
192.168.0.210.
1. Log on to Nwtraders from Dcsrv1 as a domain
administrator.
2. Open the DHCP console by clicking Start, pointing
to Administrative Tools, and then choosing DHCP.
3. In the DHCP console tree, navigate to
DHCPdcsrv1. nwtraders.msft IPv4 Scope
[191.168.0.0]Nwtraders.msft Address Pool.

47. 4. Right-click the Address Pool folder, and then
choose New Exclusion Range.
▪ The Add Exclusion dialog box opens.
5. In the Add Exclusion dialog box, type
192.168.0.200 and 192.168.0.210 in the start IP
Address and End IP Address boxes, respectively.
6. Click Add, and then click Close.
▪ In the details pane you can see that the address range
you have configured is now listed .
▪ The icon next to the range includes a red X, and the
description associated with the range is “IP Addresses
excluded from distribution.”
7. Log off Dcsrv1.

48. Contact Me: qursaan@gmail.com