Network Registrar Help

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DHCP administrators manage dynamic host configurations in their network. They do not have complex client classification or DHCP request handling customization requirements. They rather want to use the basic features of the DHCP server to easily configure a large number of devices with their basic IP configuration.

The DHCP administrator usually manages DHCP scopes and policies, and clients and client-classes.

• List and add DHCP scopes
• List and add DHCP scope templates
• List and add DHCP policies
• List and add DHCP clients
• List and add DHCP client-classes
• List and edit DHCP networks
• List and add DHCP failover servers
• Manage the DHCP server

At the local cluster only, this page displays DHCP scopes, if you are assigned the dhcp-admin role. From this page, you can add, edit, and delete scopes, unless you are a read-only administrator. The scopes are listed alphabetically, with their subnet address and mask, and any associated DHCP policies.

If you want to avoid repeating the same properties for multiple scopes, you can create a scope template and then associate it with the scopes.

• To add a scope, enter values in the fields (described in the following table), then click Add Scope. If you do not choose a scope template, this opens the Add DHCP Scope page. If you give the scope a name and choose a template, the scope is added to the list; you do not need to add any scope attributes, because the template handles it.

• To list the leases for a scope, click the View icon () in the Leases column. This opens the List DHCP Leases for Scope page.

• To edit a scope, click its name in the list. This opens the Edit DHCP Scope page.

• To delete a scope, click the Delete icon () next to the name in the list. This opens a Confirm Delete page.

You can list the scopes sorted by scope name or subnet. To sort by scope name, click the Name column heading. To sort by subnet, click the Subnet column heading.

This page also lets you search for scopes, navigate through the list, and change the display size. Refresh the list every time you make changes and come back to this page.

At the local cluster, only, this page lets you add DHCP scopes for address leases if you did not associate a template for the scope on the List/Add DHCP Scope page. You must specify a name, network address and mask, and policy for each scope. You can also add desired address ranges and lease reservations to the scope. The fields to enter are as follows:

NOTE: You must click Add Scope on this page to finish creating the scope.

Field/Choice	Description
Name	Name of the scope. Enter a value that is unique, yet reflects the scope's use. It can be any character string of any length, but it is best to keep it as short as possible while still making it unique. Required.
Subnet	Enter a the network address, in quad format, such as 192.168.50.0, and choose the network prefix mask from the drop-down list. If you choose a mask of 24, for example, the subnet would be 192.168.50.0/24. Required.
Policy	Policy associated with the scope. Choose from the predefined policies in the drop-down list, as defined by clicking Policies on the Secondary Navigation bar. The default and system-default-policy policies already appear in the list. You can also choose the blank policy value, if desired. Required. The default is the default policy.
Ranges Start, End	Address ranges to include in the scope. These ranges do not need to be contiguous, but they must be part of the defined network/mask, and they cannot overlap. Enter either the full network address or just the host part of the address in the Start and End fields, then click Add Range for each range entered. The ranges appear in the order entered below the button. You can delete any range by clicking the Delete icon () next to the item. You cannot edit an added range; you must delete and then recreate it. Optional.
Reservations IP Address, MAC Address	Any addresses that have reserved leases. You enter each host address separately, with their associated MAC (hardware) address. Enter the host address in the IP Address field, and the MAC address in the MAC Address field. The MAC address should be in the form 1,6,nn:nn:nn:nn:nn:nn (with the prefix) or nn:nn:nn:nn:nn:nn (without the prefix), with the numbers in hexadecimal, such as 00:d0:ba:d3:bd:3b. Then, click Add Reservation for each reservation entered. The reservations appear in the order entered below the button. (If you add more than ten reservations, they appear on a separate List/Add DHCP Reservations for Scope page accessible by clicking List Reservations.) You can delete any reservation by clicking the Delete icon () next to the item. You cannot edit an added reservation; you must delete and then recreate it. Optional.
Selection Tags	A scope selection tag is an arbitrary tag name associated with the scope that you use to determine if a client or client-class should belong to what scope. The tag can be any length of characters, but must be unique. Click Add Selection Tag for each tag entered. They appear in the order entered below the field. To delete any tag, click the Delete icon () next to its name. You cannot edit an added tag; you must delete and then recreate it. Optional.

The optional attributes appear in functional categories. For a description of each attribute, click the attribute name to open a help window.

After you complete these fields, click Add Scope, or Cancel to cancel the operation. You can edit or delete the scope from the List DHCP Scopes page.

When you click a scope's name on the List DHCP Scopes page, you can change any of the scope's attributes on the Edit DHCP Scope page, unless you are a read-only administrator. You can also set an embedded policy and list leases associated with this scope. For a description of the attributes already created that you can modify, see the Adding a DHCP Scope topic.

You can edit the embedded policy for the scope. In the Embedded Policy area of the page, click Edit Embedded Policy. This opens the Edit DHCP Embedded Policy for Scope page. To return from this page, click Modify Embedded Policy or Cancel.

You can list the leases for the scope. Under the Leases section, click List Leases. This opens the List DHCP Leases for Scope page where you can manage the leases.

You can also add and delete reservations. If there are more than ten reservations, they appear on a separate List/Add DHCP Reservations for Scope page accessible by clicking List Reservations.

The optional attributes appear in functional categories. For a description of each attribute, click the attribute name to open a help window.

• To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

• To modify the scope, click Modify Scope. You return to the List/Add DHCP Scopes page. Click the Refresh icon () on that page to refresh the database.

• To cancel your updates, click Cancel.

When you click List Reservations on the Add DHCP Scope or Edit DHCP Scope page, you can view the reservations for the scope, and add or delete any if necessary. To add a new reservation, add its IP address and MAC address, then click Add Reservation. To return to the originating page, click Return to Edit DHCP Scope.

When you click List Leases on the Edit DHCP Scope page, or the View icon from the List/Add DHCP Scopes page, you can view the state of the leases for that scope, and further manage each lease individually, unless you are a read-only administrator. This page includes the following information:

Click Return to DHCP Scope to return to the Edit DHCP Scope or List/Add DHCP Scopes page.

When you click a lease name on the List DHCP Leases for Scope page, you can manage the lease by viewing its DHCP attributes, forcing its availability if it is made unavailable, de-activating it if it is activated, or activating it if it is de-activated. If you have read-only privileges, you can only view the lease data, and the Force Available and Deactivate or Activate functions are not available.

The lease attributes, their values, and data types appear in categories. The attributes are read-only and none of them have default values. For a description of each attribute, click the attribute name to open a help window.

• To force a lease to be available, click Force Available at the bottom of the page.

• To de-activate a lease that is marked as activated, click Deactivate at the bottom of the page.

• To activate a lease that is marked as de-activated, click Activate at the bottom of the page.

You can edit the embedded policy for a scope, scope template, client, and client-class, unless you are a read-only administrator. An embedded policy is implicitly created when you create one of these objects.

For example, you can edit a scope's embedded policy by clicking Edit Embedded Policy in the Embedded Policy section of the Edit DHCP Scope page. On the Edit DHCP Embedded Policy page, you need to specify an offer timeout, grace period, and server lease time value for the embedded policy. You can also add DHCP options and further attributes for the embedded policy. The fields to enter are as follows:

Field	Description
Offer timeout	Time that the DHCP server waits after offering a lease to a client, but the client refuses the lease, and when the server should make the lease available to another client. The default is two minutes (2m). Values can also be in seconds (s), minutes (m), days (d), weeks (w), or years (y), or any combination thereof.
Grace period	Time between when a lease expires and when the DHCP server should make the lease available to clients again. The default is five minutes (5m). Values can also be in seconds (s), minutes (m), days (d), weeks (w), or years (y), or any combination thereof.
Options	DHCP options. Choose an option from the Number drop-down list. Then, give the option a value in the Value field. The Web UI validates each option value. For a description of each option, see the Network Registrar User's Guide. You must add each option one at a time, using Add Option. The added option appears below the button. You cannot edit an option once it is created; you must delete and replace it. To delete an option, click the Delete icon () next to the item; you are not given a confirmation.

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window. To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

After you complete these fields, click Modify Embedded Policy, or click Cancel to cancel the changes.

At the regional and local clusters, this page displays scope templates used to apply certain common attributes to multiple scopes. This and the related pages are available only to administrators assigned the dhcp-management subrole of the central-cfg-admin or regional-addr-admin role.

You can use this page to create, add, edit, and delete scope templates, unless you are a read-only administrator. On the regional cluster, you can view the aggregate list of scope templates from the local servers. You can also pull scope templates from, and push them to, the local servers. On the local cluster, you can only add, edit, and delete scope templates.

• To pull scope templates from the replica data of the local clusters, click Pull Replica Scope Templates to open the Select Replica DHCP Scope Template Data to Pull page.

• To add a template, click Add Scope Template. This opens the Add DHCP Scope Template page.

• To edit a template, click its name in the list. This opens the Edit DHCP Scope Template page.

• To push a scope template to the local clusters, click Push Scope Template next to the template name, or Push All Scope Templates. You would then choose the clusters and update them on the Push Scope Template Data to Local Clusters page.

• To delete a template, click the Delete icon () next to the name in the list. This opens a Confirm Delete page.

This page lets you add scope templates. You must specify a name for each template, and you can create a scope based on, and associate a policy with, the template. You can also add desired address ranges and scope selection tags for each template. The fields to enter or choices to make are:

Field/Choice	Description
Name	Name of the scope template. Enter a value that is unique, yet reflects the template's use. Required.
Scope Name Expression	Expression of the scope you want to create with this template. For details on expressions, see the Scope Expressions topic. The expression must return a string. Optional.
Policy	Policy associated with the template. Choose from the predefined policies in the drop-down list, as defined by clicking Policies on the Secondary Navigation bar. The default and system-default-policy policies already appear in the list. You can also choose the blank policy value, if desired. Optional.
Range Expression	Expression of the address ranges you want to include with this template. For details on expressions, see the Scope Expressions topic. The expression must return a range or list of ranges. Optional.
Embedded Policy Option Expression	Expression of the options you want to include in the scope's embedded policy. For details on expressions, see the Scope Expressions topic. The expression must return an option or list of options. Optional.
Scope Selection Tags	A scope selection tag is an arbitrary tag name associated with clients and client-classes to determine what scope they should belong to. The tag can be any length of characters, but must be unique. Click Add Selection Tag for each tag entered. They appear in the order entered above the button. To delete any tag, click the Delete icon () next to its name. You cannot edit an added tag; you must delete and then recreate it. Optional.

The optional attributes appear in functional categories. For a description of each attribute, click the attribute name to open a help window.

After you complete these fields, click Add Scope Template, or click Cancel to cancel the changes. You can edit or delete the template from the List DHCP Scope Templates page.

When you click a scope template name on the List DHCP Scope Templates page, you can change its name, scope name, and policy name, and add or delete scope selection tags, unless you are a read-only administrator. For a description of these attributes, see the Adding a Scope Template topic. For a description of the available expressions to include in the Expression fields, see the Scope Expressions topic.

You can also edit the scope template's embedded policy and add attributes. To edit the template's embedded policy, click Edit Embedded Policy in the Embedded Policy section of the page. This opens the Edit DHCP Embedded Policy for Template page.

The optional attributes appear in categories. For a description of each attribute, click the attribute name to open a help window. To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

After you modify these fields, click Modify Scope Template, or click Cancel to cancel the modifications. You can delete the scope on the List DHCP Scope Templates page.

The following table describes the scope expression functions you can use on the Add DHCP Scope Template or Edit (or View) DHCP Scope Template page. The functions are not case sensitive.

(concat "ISP-" subnet) yields ISP-192.168.50.0/24
(concat subnet "-" (+ template.ping-timeout 10)) yields 192.168.50.0/24-110
(concat "ISP-" subnet "-" (+ template.ping-timeout 10)) --> ISP-192.168.50.0/24-110.

(create-option "domain-name" "example.com")
(create-option 3 "10.10.10.1")
(create-option "routers" "10.10.10.1,10.10.10.2,10.10.10.3")
(create-option "routers" (create-ipaddr subnet 10)).

(create-range "192.168.50.65" "192.168.50.74") yields 192.168.50.65 - 192.168.50.74
(create-range 1 10) yields 192.168.50.65 - 192.168.50.74

(create-ipaddr subnet 4)

(list (create-option "routers" "10.10.10.1") (create-option "domain-name" "example.com"))
(list (create-range 1 5) (create-range 10 20))

At the regional cluster only, this page appears if you click Push Scope Template or Push All Scope Templates on the List DHCP Scope Templates page. It shows the templates to be pushed (or All Scope Templates) and a choice of local clusters to which to push them.

The fields and choices on this page are:

TIP: The cluster choice and radio buttons are persistent, so that any future operations on this page will retain these settings.

After making these choices, click Push Data to Clusters, or Cancel. This opens the View Push Scope Template Data Report page.

At the regional cluster only, this page appears if you click Push Data to Clusters on the Push Scope Template Data to Local Clusters page. It shows a read-only summary of the results of the push operation. Click OK or Cancel to return.

At the regional cluster only, this page appears if you click Pull Replica Scope Templates on the List DHCP Scope Templates page. It shows a tree view of the regional server's replica data for the local clusters' scope templates. The tree has two levels, one for the clusters and one for the scope templates in each cluster.

The columns on this page are:

Column	Description
Name	Name of the local cluster and its scope templates. If necessary, click the cluster name to open the Edit Server Cluster page. You can also view the template data by clicking its name to open the View DHCP Scope Template page.
Update Replica Data	To update the replica data for the local cluster on the regional cluster, click the Replica icon ().
Pull Data	To pull a specific scope template, click Pull Scope Template next to its name. To pull all the templates from the cluster, click Pull All Scope Templates from Cluster.

To complete the operation, click OK, or Cancel to cancel, to return to the List DHCP Scope Templates page.

At the regional cluster only, this page appears when you pull scope templates on the Select Replica DHCP Scope Template Data to Pull page. It shows the changes to be made with the pull operation. Click Run, or Cancel to cancel the operation.

At the regional cluster only, this page appears when you click Run on the Report Pull Replica Scope Templates page. After looking at the report data, click Run to complete the pull operation.

At the regional and local clusters, this page displays any created DHCP policies you can associate with scopes. This and the related pages are available only to administrators assigned the dhcp-management subrole of the central-cfg-admin role. From this page, you can add, edit, and delete policies, unless you are a read-only administrator. The policies are listed alphabetically, with their offer timeout, grace period, and lease time values displayed. The default and system_default_policy policies are predefined.

On the regional cluster, you can view the aggregate list of policies from the local servers. You can also pull policies from, and push them to, the local servers.

• To pull policies from the replica data of the local clusters, click Pull Replica Policies to open the Select Replica DHCP Policy Data to Pull page.

• To add a policy, click Add Policy. This opens the Add DHCP Policy page.

• To edit a policy, click its name in the list. This opens the Edit DHCP Policy page.

• To push a policy to the local clusters, click Push Policy next to its name, or Push All Policies. You would then choose the clusters and update them on the Push DHCP Policy Data to Local Clusters page.

• To delete a policy, click the Delete icon () next to the name in the list. This opens a Confirm Delete page.

This page also lets you search for policies, navigate through the list, and change the display size. Refresh the list every time you make changes and come back to this page.

This page lets you add DHCP policies to associate with scopes. You need to specify a name, offer timeout, and grace period. You can also add DHCP options for the policy, such as the dhcp-lease-time. The fields to enter are as follows:

Field/Choice	Description
Name	Name of the policy. Enter a value that is unique, yet reflects the policy's use. It can be any character string of any length, but it is best to keep it as short as possible while still making it unique. Required.
Offer timeout	Time the DHCP server waits after offering a lease to a client, but the client refuses the lease, and when the server should make the lease available to another client. The default is two minutes (2m). Values can also be in seconds (s), minutes (m), days (d), weeks (w), or years (y), or any combination thereof. Optional.
Grace period	Time between when a lease expires and when the DHCP server should make the lease available to clients again. The default is five minutes (5m). Values can also be in seconds (s), minutes (m), days (d), weeks (w), or years (y), or any combination thereof. Optional.
Options	DHCP options. Choose an option from the Number drop-down list. Then, give the option a value in the Value field. The Web UI validates each option value. For a description of each option, see the Network Registrar User's Guide. One of the more widely used options is option 51 (dhcp-lease-time), a column that appears on the List DHCP Policies page. You must add each option one at a time, using Add Option. The added option appears below the button. You cannot edit an option once created; you must delete and replace. To delete an option, click the Delete icon () next to the item.

The optional attributes appear in categories. For a description of each attribute, click the attribute name to open a help window.

After you complete these fields, click Add Policy, or click Cancel to cancel adding it. You can edit or delete the policy on the List DHCP Policies page.

When you click a policy's name on the List DHCP Policies page, you can change any of the policy's attributes and options on the Edit DHCP Policy page, unless you are a read-only administrator. The fields or choices to change are as follows:

Field/Choice	Description
Name	Name of the policy. This is a read-only value and you cannot change it.
Offer timeout	Time the DHCP server waits after offering a lease to a client, but the client refuses the lease, and when the server should make the lease available to another client. The default is two minutes (2m). Values can also be in seconds (s), minutes (m), days (d), weeks (w), or years (y), or any combination thereof. Optional.
Grace period	Time between when a lease expires and when the DHCP server should make the lease available to clients again. The default is five minutes (5m). Values can also be in seconds (s), minutes (m), days (d), weeks (w), or years (y), or any combination thereof. Optional.
Options	DHCP options. Choose an option from the Number drop-down list. Then, give the option a value in the Value field. The Web UI validates each option value. For a description of each option, see the Network Registrar User's Guide. One of the more widely used options is option 51 (dhcp-lease-time), a column that appears on the List DHCP Policies page. You must add each option one at a time, using Add Option. The added option appears below the button. You cannot edit an option once created; you must delete and replace. To delete an option, click the Delete icon () next to the item.

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window.

• To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

• To modify the policy, click Modify Policy. You return to the List DHCP Policies page. Click the Refresh icon () on that page to refresh the database.

• To cancel your updates, click Cancel.

At the regional cluster only, this page appears if you click Push Policy or Push All Policies on the List DHCP Policies page. It shows the policies to be pushed (or All Policies) and a choice of local clusters to which to push them.

The fields and choices on this page are:

TIP: The cluster choice and radio buttons are persistent, so that any future operations on this page will retain these settings.

After making these choices, click Push Data to Clusters, or Cancel. This opens the View Push Scope Template Data Report page.

At the regional cluster only, this page appears if you click Push Data to Clusters on the Push DHCP Policy Data to Local Clusters page. It shows a read-only summary of the results of the push operation. Click Cancel to return.

At the regional cluster only, this page appears if you click Pull Replica Policies on the List DHCP Policies page. It shows a tree view of the regional server's replica data for the local clusters' policies. The tree has two levels, one for the clusters and one for the policies in each cluster.

The columns on this page are:

Column	Description
Name	Name of the local cluster and its policies. If necessary, click the cluster name to open the Edit Server Cluster page. You can also view the policy data by clicking its name to open the View DHCP Policy page.
Update Replica Data	To update the replica data for the local cluster on the regional cluster, click the Replica icon ().
Pull Data	To pull a specific policy, click Pull Policy next to its name. To pull all the policies from the cluster, click Pull All Policies from Cluster. This opens the Report Pull Replica DHCP Policies page.

To complete the operation, click OK, or Cancel, to return to the List DHCP Policies page.

At the regional cluster only, this page appears when you pull DHCP policies on the Select Replica DHCP Policy Data to Pull page. It shows the changes to be made with the pull operation. Click Run, or Cancel to cancel the operation.

At the regional cluster only, this page appears when you click Run on the Report Pull Replica DHCP Policies page. After looking at the report data, click Run to complete the pull operation.

At the local cluster only, this page displays any created DHCP clients. From this page, you can add, edit, and delete clients, unless you are a read-only administrator. The clients are listed numerically, with their client-class membership.

• To add a client, enter its MAC address in the Name field, and click a client-class name from the Client Class Name drop-down list, if you want to associate the client with a predefined client-class, as defined by clicking Client-Classes on the Secondary Navigation bar. Click Add Client to open the Add DHCP Client page.

• To edit a client, click its name in the list. This opens the Edit DHCP Client page.

• To delete a client, click the Delete icon () next to the name in the list. This opens a Confirm Delete page.

This page also lets you search for clients, navigate through the list, and change the display size. Refresh the list every time you make changes and come back to this page.

Use this page to add DHCP clients. You get to it by adding a client name on the List/Add DHCP Clients page and clicking Add Client. To create a client, you must give it a name and optionally apply client-class, host, domain, and policy names. The fields to enter and choices to make are:

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window.

Click Add Client (you must do this to add the client), or Cancel. You return to the List/Add DHCP Clients page. Click the Refresh icon () on that page to refresh the database.

When you click a client's name on the List/Add DHCP Clients page, you can change any of the client's attributes and options on the Edit DHCP Client page, unless you are a read-only administrator. The fields to edit and choices to change are as follows:

You can edit the embedded policy for the client. Under the Embedded Policy section, click Edit Embedded Policy. This opens the Edit DHCP Embedded Policy for Client page. To return from this page, click Modify Embedded Policy or Cancel.

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window.

• To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

• To modify the client, click Modify Client. (In read-only mode, click Return to Client List.) You return to the List/Add DHCP Clients page. Click the Refresh icon () on that page to refresh the database.

• To cancel your updates, click Cancel.

At the regional and local clusters, this page displays any created DHCP client-classes. A client-class is a grouping of clients. This and the related pages are available only to administrators assigned the dhcp-management subrole of the central-cfg-admin role. From this page, you can add, edit, and delete client-classes. The client-classes are listed alphabetically, with their host name, domain name, and associated policies displayed.

On the regional cluster, you can view the aggregate list of client-classes from the local servers. You can also pull client-classes from, and push them to, the local servers.

• To pull client-classes from the replica data of the local clusters, click Pull Replica Client-Classes to open the Select Local DHCP Client-Class Data to Pull page.

• To add a client-class, click Add Client-Class. This opens the Add DHCP Client-Class page.

• To edit a client-class, click its name in the list. This opens the Edit DHCP Client-Class page.

• To push a client-class to the replica data of the local clusters, click Push Client-Class next to its name, or push all the created client-classes by clicking Push All Client-Classes. You would then choose the clusters and update them on the Push DHCP Client-Class Data to Local Clusters page.

• To delete a client-class, click the Delete icon () next to the name in the list. This opens a Confirm Delete page.

This page also lets you search for client-classes, navigate through the list, and change the display size. Refresh the list every time you make changes and come back to this page.

This page lets you add DHCP client-classes. You get there by clicking Add Client-Class on the List DHCP Client-Classes page. You need to specify a name, the client's host name, domain name, and any associated policies. The fields to enter and choices to make are as follows:

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window.

After you complete these fields, click Add Client-Class (you must do so to create the client-class), or Cancel. You can edit or delete the client-class on the List DHCP Client-Classes page.

When you click a client-class's name on the List DHCP Client-Classes page, you can change any of the client-class's attributes and options (other than its name) on the Edit DHCP Client-Class page, unless you are a read-only administration. For a description of the attributes and options already created that you can modify, see the Adding a DHCP Client-Class topic.

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window.

• To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

• To modify the client-class, click Modify Client-Class. This returns you to the List DHCP Client-Classes page. Click the Refresh icon () on that page to refresh the database.

• To cancel your changes, click Cancel.

At the regional cluster only, this page appears if you click Push Client-Class or Push All Client-Classes on the List DHCP Client-Classes page. It shows the client-classes to be pushed and a choice of local clusters to which to push them.

The fields and choices on this page are:

TIP: The cluster choices and radio buttons are persistent, so that any future operations on this page will retain these settings.

After making these choices, click Push Data to Clusters, or Cancel. This opens the View Push DHCP Client-Class Data Report page.

At the regional cluster only, this page appears if you click Push Data to Clusters on the Push DHCP Client-Class Data to Local Clusters page. It shows a read-only summary of the results of the push operation. Click OK or Cancel to return.

At the regional cluster only, this page appears if you click Pull Replica Client-Classes on the List DHCP Client-Classes page. It shows a tree view of the regional server's replica data for the local clusters' client-classes. The tree has two levels, one for the clusters and one for the client-classes in each cluster.

The columns on this page are:

Column	Description
Name	Name of the local cluster and its client-classes. If necessary, click the cluster name to open the Edit Server Cluster page. You can also view the client-class data by clicking its name to open the View DHCP Client-Class page.
Update Replica Data	To update the replica data for the local cluster on the regional cluster, click the Replica icon ().
Pull Data	To pull a specific client-class, click Pull Client-Class next to its name. To pull all the client-classes from the cluster, click Pull All Client-Classes from Cluster. This opens the Report Pull Replica Client-Classes page.

To complete the operation, click OK, or Cancel to cancel, to return to the List DHCP Client-Classes page.

At the regional cluster only, this page appears when you pull DHCP client-classes on the Select Replica DHCP Client-Class Data to Pull page. It shows the changes to be made with the pull operation. Click Run, or Cancel to cancel the operation.

At the regional cluster only, this page appears when you click Run on the Report Pull Replica Client-Class page. After looking at the report data, click Run to complete the pull operation.

At the local cluster only, when you create a scope in the Web UI, this creates a network based on the subnet and mask you specified for the scope. Scopes can have overlapping networks, so it is often convenient to show the networks and the scopes associated with them. The Web UI does this on the List Networks page.

This page shows the created networks. Each network has a name that is derived from its subnet and mask, in a hyphenated form, such as 192.168.500-24. You can expand each network to list the scopes associated with it. You can globally expand or collapse all the networks by clicking the Collapse All and Expand All links.

The Subnet column lists the subnet and mask, the Type column identifies whether the item is a network or a subsidiary scope, and the Selection Tags column identifies any scope selection tags associated with the scope or subnet.

On this page, you can also click a network's name to edit it, and you can edit a scope. You cannot add networks on this page; you need to create them by creating scopes.

At the local cluster only, you can edit the network name from what is automatically generated by the subnet and mask for the scope definition, unless you are a read-only administrator. You cannot modify the subnet for the network. When you finish editing the name, click Modify Network, or Cancel to cancel.

At the local cluster only, this page displays DHCP failover server pairs. From this page, you can edit, synchronize, run a report before a synchronization, and manage the servers. The server pairs are listed by a name constructed of the main and backup servers' IP addresses.

Note that failover pairs show up in this list only if they are set up using the server or scope failover attributes when editing the server attributes, or creating or editing a scope. Be sure to set at least the following on the Edit DHCP Server or Edit DHCP Scope page, then reload the DHCP server:

• Set Failover to on for the DHCP server, or use-server-settings (if set to on for the server) or scope-enabled for the scope.

• Specify the Main Server and Backup Server IP addresses on the DHCP server or scope.

On the local cluster, the name of the failover pair is a hyphenation of the main and backup server IP addresses. On the regional cluster, you can name the failover pair any unique string.

• To add a failover pair, enter values for at least the Main Server and Backup Server attributes for the server (you must specify both), and ensure that the Failover Setting attribute is enabled; or set up these attributes on the scope level.

• To edit a failover pair, click its name in the list. This opens the Edit DHCP Failover Pair page.

• To view the related servers for a main or backup DHCP server, click the Related Servers icon () to open the List Related Servers for DHCP Server page.

• To synchronize a failover pair, click the Run icon () in the Synchronize column. This opens the Run Synchronize Failover Pair page.

• To run a synchronization report, click the Report icon () in the Synchronize column. This opens the Report Synchronize Failover Pair page.

• To manage a failover server, click the View icon () in the Manage Servers column. This opens the Manage DHCP Failover Servers page.

• To delete a failover pair, click the Delete icon (), if available, next to the name in the list. This opens a Confirm Delete page. You cannot delete an active failover pair. If the icon is not available, you must first disable the Failover Setting attribute for the local cluster's DHCP server or scope.

When you click a failover pair's name on the List DHCP Failover Pair page at the local cluster, you can change some of the failover pair's attributes on the Edit DHCP Failover Pair page (in read-only mode, the View DHCP Failover page). These include its name and the failover attributes. You cannot modify the main or backup servers on this page.

The optional attributes appear at the bottom of the page. For a description of each attribute, click the attribute name to open a help window.

• To unset any of the attribute values, click a check mark in the Unset? column next to the attribute, then click Unset Fields.

• To modify the failover pair, click Modify Failover. You return to the List DHCP Failover Pair page. Click the Refresh icon () on that page to refresh the database.

• To cancel your updates, click Cancel.

When you click the Run icon () in the Synchronize column of the List DHCP Failover Pairs page, the Run Synchronize Failover Pair page shows the list of properties on the two servers that should be synchronized.

When you click the Report icon () in the Report column of the List DHCP Failover Pairs page, the Report Synchronize Failover Pair page lets you run a report on what kind of properties need to be synchronized.

There are three basic operations you can perform:

• Update -- This is the default and least radical of the operations, generally appropriate for update synchronizations in that it has the least effect on the unique properties of the backup server. The exact DHCP attributes replaced during an Update operation are described in the DHCP Attributes Affected by an Update Synchronization topic.

• Complete -- This operation is appropriate for all initial synchronizations. It is more complete than an update operation, while still preserving many of the backup server's unique properties, such as are required for back office failover configurations.

• Exact -- This operation is appropriate for initial basic and symmetrical failover configurations, and is not appropriate for back office configurations. It makes the two servers as much as possible mirror images of each other, although it retains unique DHCP server, LDAP event services, and extension points on the backup server.

  NOTE: Do not run the Exact operation when setting up a back office failover configuration, to prevent removing the union of properties between the two main servers and the backup server.

These operations perform different functions on each of the failover properties, as listed in the table on the Report Synchronize Failover Pair page. There are essentially four functions:

• no change -- Makes no change to the list of properties or their values on the backup server.

• ensure -- Ensures that a copy of the main server property exists on the backup server, but does not replace its value.

• replace -- Replaces the value of a property that the two servers have in common by that of the main server.

• exact -- Puts an exact copy of the main server's list of properties and values on the backup server and removes the unique ones.

On this page:

• To run the synchronization based on your choices, click Run. This opens the View Failover Pair Sync Report page.

• To report on what change entries would apply to a synchronization, click Report. This opens the View Failover Pair Sync Report page

• To cancel the synchronization or report, click Cancel.

You return to the List DHCP Failover Pairs page. Click the Refresh icon () on that page to refresh the database.

When you click Run or Report on the Run (or Report) Synchronize Failover Pair page, this shows the change sets for the implemented changes to the failover pair based on the synchronization operation. You can show or hide the synchronization details by clicking Show Detail or Hide Detail, respectively.

Return to listing the failover pairs by clicking Return to Failover Pair List.

The following table describes the DHCP attributes affected by an Update synchronization of the server pairs. For a description of each attribute, click its name on the Edit DHCP Server page.

When you click the View icon () in the Manage Servers column of the List DHCP Failover Pair page, you can manage the failover servers as if you were managing the local DHCP server. This includes viewing each of the servers' states, health, statistics, logs; and starting, stopping, and reloading the server. The following table describes each column and possible function.

Column	Description
Server	Main and Backup.
IP Address	IP address of each server.
State	State of the DHCP server, which can be initialized, running, or disabled. If the Web UI cannot determine the state, ? appears.
Health	Relative health of the DHCP server, as a color indicator: (10) -- optimal health -- less than optimal health (0) -- stopped. If the Web UI cannot determine the server's health, ? appears. Note that the server is healthy only if at least one scope of addresses exists.
Statistics	Click the Statistics icon () to view statistics for the server. This opens the Statistics for Server page, which shows statistics relevant to the server. You can refresh the statistics using the Refresh icon (). To return to managing the server, click Return to Manage DHCP Server on that page.
View Log	Click the Log icon () to view the log files for the server. This opens the Log for Server page, which lists the log items for the particular server ordered by date and time. You can step through the log using the arrow keys and change the number of items shown by clicking Change Page Size. You can display the log items in two different ways, a tabular format and in the log file format (which you can better use for cutting-and-pasting to a text file). Toggle between these two display modes using the View Log icon () on the Log for Server page. To return to managing the server, click Return to Manage DHCP Server on that page.
Start/Stop/Reload	Click the: Start icon () to start or restart the server. Stop icon () to stop the server. Reload icon () to reload the server. If any of these functions is unsuccessful, a red X appears in the column.

Unless you are a read-only administrator, you can manage the DHCP server, including viewing its health, statistics; starting, stopping, and reloading it; and editing its attributes.

Column	Description
Name	Description (if local) or name (if remote) of the DHCP server. Clicking the Related Servers icon () opens the List Related Servers for DHCP Server page to show the related failover, DNS, and LDAP servers.
State	State of the DHCP server, which can be initialized, running, or disabled. If the Web UI cannot determine the state, ? appears.
Health	Relative health of the DHCP server, as a color indicator: (10) -- optimal health -- less than optimal health (0) -- stopped. If the Web UI cannot determine the server's health, ? appears. Note that the server is healthy only if at least one scope of addresses exists.
Statistics	Click the Statistics icon () to view statistics for the server. This opens the Statistics for Server page, which shows statistics relevant to the server. You can refresh the statistics using the Refresh icon (). To return to managing the server, click Return to Manage DHCP Server on that page.
View Log	Click the Log icon () to view the log files for the server. This opens the Log for Server page, which lists the log items for the particular server ordered by date and time. You can step through the log using the arrow keys and change the number of items shown by clicking Change Page Size. You can display the log items in two different ways, a tabular format and in the log file format (which you can better use for cutting-and-pasting to a text file). Toggle between these two display modes using the View Log icon () on the Log for Server page. To return to managing the server, click Return to Manage DHCP Server on that page.
Start/Stop/Reload	Click the: Start icon () to start or restart the server. Stop icon () to stop the server. Reload icon () to reload the server. If any of these functions is unsuccessful, a red X appears in the column.

To edit the DHCP server attributes, click the name of the server. This opens the Edit DHCP Server page.

Refresh the list of server from time to time. The page indicates when it was last refreshed. To move from this page, click any other Navigation bar choice.

To edit the DHCP server at the local cluster, click the server name on the Manage DHCP Server page. Unless you are a read-only administrator, you can edit DHCP server attributes, which are listed in categories and have their assigned defaults, if any.

For a description of each server attribute, click the attribute name on the page to open a help window.

This page appears if you click the Related Servers icon () on the local cluster's Manage DHCP Server and List DHCP Failover Pairs pages, and the regional cluster's View Tree of Server Clusters and List Failover Pairs pages. It shows any related failover partners, and DNS and LDAP servers.

The columns on this page are:

This page appears if you click the address of the related DHCP failover server on the List Related Servers for DHCP Server page. It shows read-only detailed attribute values for the failover partner.

For the specifics about each attribute, click its name to open a popup help window.

If the partner is in the Communications-interrupted failover state, you can click Set Partner Down in association with an input field for the partner-down date setting. This setting is initialized to the value of the start-of-communications-interrupted attribute. In Normal Web UI mode, you cannot set this date to be an earlier value than the initialized date. In Expert Web UI mode, you can set this value to any date. After clicking Set Partner Down, you return to the List Related Servers for DHCP Server page to view the result of the partner-down action.

To refresh the data, click Refresh Data. To return to the List Related Servers for DHCP Server page, click OK.