This section provides information about the following:
For better performance results with the iManager utility, particularly in a distributed DNS/DHCP setup, you should configure the DNS/DHCP scope settings for the session before you proceed with other administrative tasks.
If you do not configure the DNS/DHCP scope settings for the session, you will receive a warning before every task you attempt to perform indicating that the scope settings are not set. However, you can proceed with the task by ignoring the messages.
Setting the scope of the DNS/DHCP services involves two specifications for the session: the Novell® eDirectory™ context of the Locator object and the administrative scope of the session. Specifying the eDirectory context of the Locator object at the start of the session significantly improves performance because it eliminates the need to search for the Locator object. Specifying the administrative scope of the session also improves performance significantly because it restricts the retrieval of DNS/DHCP objects for viewing to the scope you specify.
When you configure the DNS/DHCP scope settings for a session, they last only as long as the session lasts. If you start a new session, you must configure the DNS/DHCP scope settings again.
IMPORTANT:If you configure DNS/DHCP scope settings for a session for either DNS or DHCP, the settings apply across the session to both roles.
To configure DNS/DHCP scope settings:
In iManager, click or to open the DNS/DHCP Scope Settings window.
Specify the eDirectory context of the DNS/DHCP Locator object.
Specify the eDirectory context of the container object that will provide the administrative scope of the current session.
If you specify only the eDirectory context of the DNS/DHCP Locator object and not the administrative scope of the current session, you can proceed with administrative tasks without receiving a warning message. However, performance is further optimized if you also define the administrative scope.
Click .
Click to configure the scope settings again.
A message indicates that the scope request was successful.
Complete the following prerequisites before setting up DHCP:
Install NetWare 6.5 on the selected servers.
Install Novell iManager.
Install Internet Explorer 5.0, Internet Explorer 5.5 Support Pack 2, or Internet Explorer 6.0.
DHCP (and BOOTP) options can be assigned at three levels:
Globally
At the subnet level
At the IP address level
The DHCP server’s options inheritance rules specify that options assigned at the lowest level override options set at a higher level.
The Global DHCP Configuration role consists of the following tasks:
These tasks are available from the iManager interface.
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Global DHCP Preferences window.
Click to open the DHCP Options window.
The DHCP options you can configure globally are listed in the list box. To configure an option:
Select the option from the list box, then click .
Specify the required supporting information as prompted.
Click to close the DHCP Options window.
The global DHCP option you added or configured is displayed in the list.
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Global DHCP Preferences window.
Click to open the list in the Global DHCP Defaults window.
This list contains the MAC addresses of clients that should not receive IP addresses from DHCP servers. These exclusions apply to all DHCP servers in the eDirectory tree.
Click , specify the MAC Address of the client, and then specify the hardware type.
Click .
Click to open the list in the Global DHCP Defaults window.
This list contains the MAC addresses of clients that will receive IP addresses from DHCP servers.
Click , specify the MAC Address of the client, and then specify the hardware type.
Click .
The MAC address is added to the list. This assignment applies to all DHCP servers in the eDirectory tree.
IMPORTANT:The and lists are mutually exclusive. You should configure only one of these lists and ensure that the other list is empty.
The DHCP Options Table provides a list of parameters that can be defined for use on the network. After an option is defined, you can assign a value to the option by using Global DHCP Options.
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Global DHCP Preferences window.
Click three times to open the DHCP Options Table window that lists both the system-defined and user-defined DHCP options.
After you have finished viewing the options, click to return to the home page.
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Global DHCP Preferences window.
Click three times to open the DHCP Options Table window that lists both the system-defined and user-defined DHCP options.
Click , select the DHCP option code, select the data syntax, add the description of the new option, then click .
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Global DHCP Preferences window.
Click three times to open the DHCP Options Table window that lists both the system-defined and user-defined DHCP options.
Select the option code, then click .
The Import DHCP Configuration feature enables you to copy DHCP 2.0 and 3.0 user files into the eDirectory database.
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Import DHCP Configuration File window.
Specify the eDirectory context or browse to select it.
Select the default name from the drop-down menu.
Specify the name of the or browse to select it.
Click .
The DHCP subnet configuration information is displayed.
To add an available DHCP subnet to the list of selected subnets, click.
To include all available DHCP subnets to the list of selected subnets, click .
To delete a selected subnet from the list of subnets, click .
To delete all subnets from the list of selected subnets, click .
The Export DHCP Configuration allows you to copy the eDirectory database to a text file. The text file enables you to import DHCP subnet configuration data to other applications. You can also import the file back into the eDirectory database by using the iManager utility.
In iManager, click to open the Global DHCP Configuration window in the main panel.
From the drop-down menu, select , then click to open the Export DHCP Configuration File window.
Add or remove DHCP subnet information:
To add an available DHCP subnet to the list of selected subnets, click .
To include all available DHCP subnets in the list of selected subnets, click Add .
To delete a selected subnet from the list of selected subnets, click .
To delete all selected DHCP subnets, click .
Click and save the file when prompted.
Click e to export the file.
The DHCP Server Management role consists of the following tasks:
Use the iManager utility to create and set up a DHCP Server object. A DHCP Server object can be created or located under any of the following objects:
Organization (O)
Organization Unit (OU)
Country (C)
Locality (L)
To create and set up a DHCP server object:
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select , then click to open the Create DHCP Server window.
Specify the name of the NCP™ server or browse to select it.
Click .
A message indicates that the new DHCP server object has been created.
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select , then click to open the View/Modify Server window.
Select the object from the drop-down menu.
Click .
You will be led through a set of steps by where you can modify the following parameters:
Subnet Address Range Serviced by this Server: Displays information about the range of addresses that can be dynamically assigned by the server.
Subnet Serviced by this Server: Displays information about the subnet to which the server can assign addresses.
Comments: You can type comments about the DHCP server in this box. This parameter is optional.
Set SNMP Traps Option: SNMP traps control DHCP server event trapping. Select from the following options:
None: Turns off SNMP traps.
Major Events: Traps only the critical events (default).
All: Traps both major and minor events.
Audit Trail and Alerts Option: Auditing allows you to analyze the historical data and diagnose operational difficulties. Select from the following options:
None: Disables auditing.
Major Events: Audits only major events such as SNMP traps (default).
All: Audits all events.
Enable Audit Trial Log: Select this to log audit trails and events.
Mobile User Option: The DHCP server can be configured to support mobile users such as laptop users. Select from the following options:
No Mobile Users Allowed: Disables support for mobile users.
Allow Mobile Users but Delete Previously Assigned Address: Deletes previously assigned addresses while granting an address to a mobile user (default).
Allow Mobile Users but Do Not Delete Previously Assigned Address: Caches previously assigned addresses while granting an address to a mobile user.
Ping Address: Select this to ping an address to ensure that the address is not in use before it is assigned. Enabling ping increases traffic on the network.
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select , then click to open the Delete DHCP Server window.
To remove all DHCP servers in the list, click the top-level check box, then click .
To remove one or more DHCP servers, click the check box next to the server, then click .
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select , then click to open the DHCP Server Start/Stop Services window.
From the drop-down menu, select the server.
Click .
Depending on the state of the DHCP Server module, one of the following is displayed:
Failure notification message: This appears if the DHCP Server module (dhcpsrvr.nlm) is not loaded. In order to start the server, load the DHCP Server module through the system console.
Start button: If the DHCP Server module is loaded but is in Stop mode, click the button to start the DHCP server.
Stop button: If the DHCP Server module is loaded but is in Start mode, click the button to stop the DHCP server.
NOTE:To use the Start/Stop DHCP service, load the dhcpsrvr.nlm.
This task enables you to load or unload a DHCP server.
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select and then click to open the Load/Unload Server window.
Select the , then click .
Depending on the state of the DHCP server, you are prompted to load or unload the NLM™
(Conditional) If the NLM is not loaded on the machine, you are prompted to load dhcpsrvr.nlm and the supported command line options are displayed. Enter the command line options to load the NLM with, then click .
(Conditional) If the NLM is already loaded on the machine, you are prompted to unload dhcpsrvr.nlm. Click to unload it.
Click to complete the task.
When you click or , the corresponding command is sent to the server. The success status in iManager indicates only that the command was issued to the server. This does not necessarily mean that the command execution was successful.
To configure a DHCP server for auditing, use the option.
In iManager, click .
Select the , click , then click
Click , click the check box, then click .
To view the audit trail log, csatpxy.nlm must be running on the server and the DHCP server must have been started at least once with a subnet assigned to it.
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select , then click to open the DHCP Audit Trail Log window.
Select the server from the DHCP Server drop-down menu.
If you want to filter the , modify the start and end dates in the appropriate fields.
Use the following date format:
Click .
This opens the DHCP Audit Trail Log table, which lists the following data:
Entry Time
IP Address
Type
Status
Hostname
Hardware Address
Client ID
Lease Type
To define a view filter on the DHCP Audit Trail Log, click .
You can filter events on the following parameters:
Start Date: Sets a start date for monitoring the DHCP audit trail.
End Date: Sets an end date for monitoring the DHCP audit trail.
Transaction Type: Manual, dynamic, automatic, exclusion, unauthorized or IPCP, and Fix Host Dynamic.
Click in the DHCP Audit Trail Log window.
Click the link, then save the Audit Trail Log file on your local machine.
To view the event log, csatpxy.nlm must be running on the server and the DHCP server must have been started at least once with a subnet assigned to it.
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, select , then click to open the DHCP Event - Events Log window.
Select the server from the drop-down menu.
If you want to filter the , modify the start and end dates in the appropriate fields.
Use the following date format:
Click .
This opens the DHCP Event Log table that lists the following data:
Entry TIme: Date and time the event occurred.
Severity: Severity of the event (critical, major, warning, and informational).
State: State of the server (operational, degraded, and inoperative).
Description: Description of the event that occurred.
To define a view filter on the DHCP Events Log, click .
You can filter events on the following parameters:
Start Date: Sets a start date for monitoring the DHCP Event Log.
End Date: Sets an end date for monitoring the DHCP Event Log.
Severity: Severity level of the event (critical, major, warning, and informational).
State Settings: Condition of events recorded (operational, degraded, and inoperative).
To view the event log, csatpxy.nlm must be running on the server.
In iManager, click to open the DHCP Server Management window in the main panel.
From the drop-down menu, Select and click to open the DHCP Event - Events Log window, then click .
Click the link, then save the event log file on your local machine.
The Subnet Pool object provides support for multiple subnets through a DHCP relay agent or BOOTP forwarder by identifying a pool of subnets for remote LAN address assignments.
The Subnet Pool Management role consists of the following tasks:
In iManager, click to open the Subnet Pool Management window in the main panel.
From the drop-down menu, select , then click to open the Create Subnet Pool window.
Specify a unique subnet pool name in the field.
Specify the eDirectory context where the subnet pool record will be placed.
Click .
A message indicates that the new subnet pool object has been created.
In iManager, click to open the Subnet Pool Management window in the main panel.
From the drop-down menu, select , then click to open the View/Modify Subnet Pool window.
Select the from the drop-down menu.
Click .
You can modify the Subnet Type configuration parameter. You can add a subnet to a subnet pool or remove a subnet from the pool.
To add a subnet to a subnet pool, click , select the subnet, then click .
To remove a subnet from a subnet pool, select the subnet, then click .
In iManager, click to open the Subnet Pool Management window in the main panel.
From the drop-down menu, select , then click to open the Delete Subnet Pool window.
To remove all the Subnet Pool objects in the list, click the top-level check box, then click .
To remove one or more Subnet Pool objects, click the check box next to it, then click .
You can use the iManager utility to create and set up a DHCP Subnet object for each subnet to which you will assign addresses.
A Subnet object’s specific DHCP options and configuration parameters apply to the entire subnet and override global options.
The Subnet Management role consists of the following tasks:
In iManager, click to open the Subnet Management window in the main panel.
From the drop-down menu, select , then click OK to open the Create Subnet window.
Specify a unique subnet name.
Specify or browse to and select the eDirectory context where the new subnet record will be stored.
Specify a , a , and the name of a default DHCP server in the fields provided.
The default DHCP server field designates the principal DHCP server for a subnet. This server is assigned all the address ranges created under the subnet, unless a different server is specified when the range is created. The default server is the only server that responds to BOOTP requests for the subnet.
Click .
A message indicates that the new subnet has been created.
NOTE:The IP address objects are simultaneously created to exclude routing and broadcast addresses.
In iManager, click to open the Subnet Management window in the main panel.
From the drop-down menu, select , then click to open the View/Modify Subnet window.
Select the from the drop-down menu.
Click .
You will be led through a set of steps where you can modify the following parameters:
DNS Zone for Dynamic Update: Specifies the DNS zone where dynamic updating occurs. The specified DNS zone is then notified of any changes to the subnet.
Domain Name: Specifies the domain name that will be combined with the hostname received from the client computer. This name is given to DNS during the dynamic DNS update. The domain name must be part of the zone specified for dynamic DNS.
Subnet Pool Reference: Specifies the subnet pool to be used by the subnet. This parameter setting is optional. Subnet pools enable the DHCP server to assign addresses to multiple logical networks on a single physical network. A subnet pool groups logical networks.
Default DHCP Server: Specifies a default DHCP server that will assign address ranges for the subnet. This server is also the only server that responds to BOOTP requests for the subnet.
Comments: You can type your comments about the subnet. This parameter is optional.
Lease Type: Specifies the length of time for an address assignment. A lease type can be permanent or timed. Permanent leases never expire; the client is assigned an IP address for an indefinite period. Timed leases are defined in days, hours, and minutes. Timed leases expire, unless the client renews the lease.
Set Boot Parameter Options: Select this to specify the server address, server name, and boot file name for the BOOTP service. This information, provided at boot time, includes the address and name of a server that the client can contact for a boot image, as well as a boot filename.
Other DHCP Options: To configure an option:
Click to open the DHCP options page that lists the available DHCP options.
Select the DHCP option and provide the necessary DHCP information.
To add an available DHCP option to the list of selected options, click .
To include all available DHCP options to the list of selected options, click .
To delete a selected DHCP option from the list of options, click.
To delete all DHCP options from the list of selected options, click .
Click .
To remove a DHCP option:
To remove all DHCP options, click the top-level check box, then click .
To remove one or more DHCP options, click the check box next to it, then click .
In iManager, click to open the Subnet Management window in the main panel.
From the drop-down menu, select , then click to open the Delete Subnet window.
To remove all Subnet objects in the list, click the top-level check box, then click .
To remove one or more Subnet objects, click the check box next to it, then click .
Use the iManager utility to create and set up Subnet Address Range objects for each pool of addresses you want to be dynamically assigned by DHCP. Optionally, the Address Range object stores the start of a hostname that can be assigned to clients when addresses are assigned.
The Address Range Management role consists of the following tasks:
In iManager, clickto open the Address Range Management window in the main panel.
From the drop-down menu, select , then click to open the Create Address Range window.
Select the subnet where the address range will be created.
In the field, type the name of the subnet address range.
Click , then select the subnet address range from the list of address ranges displayed in the Subnet Address Range window.
This automatically fills the and fields that specify the lower and upper limits of the range.
Click .
A message indicates that the new subnet address range has been created.
In iManager, click to open the Address Range Management window in the main panel.
From the drop-down menu, select , then click to open the View/Modify Subnet Address Range window.
From the drop-down menu, select the subnet that contains the address range you want to modify.
From the drop-down menu, select the address range to be modified.
Click .
You will be led through a set of steps where you can modify the following address range parameters:
Range Type: Indicates the range of addresses used by the DHCP server in response to requests from clients.
From the drop-down menu, select one of the following:
Dynamic DHCP: A range of addresses used by the DHCP server to assign addresses to clients making only DHCP requests. If the range type is assigned, the parameter can be enabled. If is selected, the DHCP server updates DNS as dynamic addresses are assigned and released.
Dynamic BOOTP: A range of addresses used by the DHCP server to assign addresses to clients making only BOOTP requests.
Dynamic BOOTP and DHCP: A range of addresses used by the DHCP server to assign addresses to clients making either DHCP or BOOTP requests. If the range type is assigned, the parameter can be enabled. If is selected, the DHCP server updates DNS as dynamic addresses are assigned and released.
Dynamic DHCP with AutomaticHost Name Generation: A range of addresses used by the DHCP server to assign addresses to clients making only DHCP requests. The hostnames for this pool will be generated and specified into the DNS system. These hostnames are provided to clients as a DHCP option. If you select this option, ensure that you create the corresponding IN-ADDR.ARPA zone.
Excluded: A range of addresses that is excluded by the DHCP server while assigning IP addresses.
If the range type is assigned, the parameter can be set. This parameter appends a unique integer to the hostname, generating a unique hostname for each client.
Additionally, the name of the DHCP server can be specified by selecting it from the DHCP Server drop-down menu.
Comments: You can type your comments about the subnet address range in this box. This parameter is optional.
In iManager, click to open the Address Range Management window in the main panel.
From the drop-down menu, select , then click to open the Delete Subnet Address Range window.
Select the subnet that contains the address range.
To delete all address ranges in the subnet, click the top-level check box and click .
To delete one or more Address Range objects, click the check box next to it and click .
Use the iManager utility to create and set up any IP address objects to be assigned to specific devices or to be excluded from dynamic assignment. Create an IP address object for each device or address. Assigning a specific address to a client requires that you specify the client’s media-access control (MAC) address or Client ID.
If you have set up subnets and subnet address ranges, you are not required to set up individual IP addresses unless you want to perform manual address assignment or exclude addresses from assignment.
The IP Address Management role consists of the following tasks:
In iManager, click to open the IP Address Management window in the main panel.
From the drop-down menu, select and click to open the Create IP Address window.
From the drop-down menu, select the subnet where the IP address will be created.
Specify the .
Select an assignment type for the IP address object.
Assignment types for an IP address object are Dynamic, Manual, and Exclusion. If the IP address is dynamically assigned by the DHCP server, it is automatically displayed.
Valid types that can be created manually are and . A manual assignment type must have either a MAC Type or a Client Identifier in order for the IP address object to be created.
Client Identifier uniquely identifies the client.
MAC Type specifies the MAC address type.
MAC Address specifies the hardware address of the NIC (Network Interface Card).
Click .
A message is displayed indicating that the new IP address object has been created.
In iManager, click to open the IP Address Management window in the main panel.
From the drop-down menu, select , then click to open the View/Modify IP Address window.
Select the subnet that contains the IP address you want to modify.
Select the .
Click .
You will be led through a set of steps where you can modify the following IP address object parameters:
Assignment Type: Specifies Exclusion or Manual IP address assignment types.
Exclusion: Address objects are created to identify IP addresses that should be excluded from DHCP server address assignment. An Excluded assignment type designates that the IP address will not be used.
Manual: Address objects are created to identify an IP address to be assigned to a device. A client identifier or MAC address must be configured for the manual address so that the DHCP server can identify the appropriate client. Manual assignment types specify client identifiers, MAC types, MAC addresses, or hostname parameters
Client Identifier: Uniquely identifies the client.
MAC Type: Specifies the MAC address type.
15, Frame Relay
16, Asynchronous Transfer Mode (ATM)
17, HDLC
18, Fibre Channel
19, Asynchronous Transfer Mode (ATM)
20, Serial Line
21, Asynchronous Transfer Mode (ATM)
MAC Address: Specifies the hardware address of the NIC (Network Interface Card).
Host Name: Specifies the name of the host server.
Associated eDirectory Object: Use this field to select another object in the eDirectory database to maintain a reference to. For example, identify a user who typically uses the device associated with this address.
Comments: You can type comments about the address object in this box. This parameter is optional.
Lease Expiration Option: A lease type can be permanent or timed. Permanent leases never expire; the client is assigned an IP address for an indefinite period. Timed leases are defined in days, hours, and minutes. Timed leases expire, unless the client renews the lease.
Last Used: Displays when the IP address was last used.
Other DHCP Options: Use this to add, delete, update, or specify default DHCP options for a manually assigned address type. Default is used to display DHCP options inherited from global preferences and the Subnet object that the address object is under.
In iManager, click to open the IP Address Management window in the main panel.
From the drop-down menu, select , then click to open the Delete IP Address window. Select the subnet that contains the IP address.
To remove all IP Address objects in the list, click the top-level check box, then click .
To remove one or more IP Address objects, click the check box next to it, then click .