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A fixed address represents a persistent link between an IP address and one of the following:

  • MAC address
  • Client identifier
  • Circuit ID or remote ID in the DHCP relay agent option (option 82)

You can create fixed addresses as described in Adding IPv4 Fixed Addresses or from the Tasks Dashboard. For information about the Tasks Dashboard, see The Tasks Dashboard. You can also create a fixed address when you create a host record or when you convert an active, dynamically leased address to a fixed address. For more information, see Adding Host Records and Converting DHCP Leases.
When you create a fixed address, you must define a host identifier that the DHCP server uses to match the DHCP client. Every time the DHCP client with the matching identifier requests an IP address, the DHCP server assigns it the same address.
When a DHCP client sends a DHCPDISCOVER, it can include the MAC address or a unique client identifier as option 61 in the DHCP section of the packet. Using a client identifier is especially useful for virtualized server processes that might be moved to different hardware platforms. For information about option 61, refer to RFC2132, DHCP Options and BOOTP Vendor Extensions. You can select either the MAC address or client identifier as the host identifier in a fixed address. The DHCP server matches the option 61 value in the client request using either the MAC address or client identifier, depending on your configuration. When a DHCP client renews an IP address using a matching MAC address or client identifier, the DHCP server tracks the allocation of IP addresses and reserves the same IP address for the client.
When you enter a MAC address, you can use one of the following form ats:

  • aa:bb:cc:dd:ee:ff — Six groups of two hexadecimal digits separated by colons (:)
  • aa-bb-cc-dd-ee-ff — Six groups of two hexadecimal digits separated by hyphens (-)
  • aabb.ccdd.eeff — Three groups of four hexadecimal digits separated by periods (.)
  • aabbcc-ddeeff — Two groups of six hexadecimal digits separated by a hyphen (-)
  • aabbccddeeff — One group of 12 hexadecimal digits without any separator

After you save the entry, the appliance displays the MAC address in the AA:BB:CC:DD:EE:FF format.
When a DHCP client requests an IP address through a DHCP relay agent, the agent adds either the circuit ID or remote ID, or both, to the DHCP relay agent information option (option 82). For information, see About the DHCP Relay Agent Option (Option 82). When you select the DHCP relay agent option (circuit ID or remote ID) as the host identifier in a fixed address, the DHCP server matches the DHCP client request using either the circuit ID or the remote ID, depending on your configuration. When a DHCP client renews an IP address using a matching relay agent ID, the DHCP server tracks the allocation of IP addresses and reserves the same IP address for the client. Note that leases are not renewed at the standard renewal time (T1) when option 82 information is not available as a unicast renewal. Instead, leases are renewed at the rebinding time (T2) when renewals are sent as broadcasts to the relay agents and contain option 82 information. For information about how to configure the lease time, see Configuring General IPv4 DHCP Properties.

Adding IPv4 Fixed Addresses

For Cloud Network Automation, you can create IPv4 fixed addresses within the delegation authority of a Cloud Platform Appliance. The newly created fixed address is forwarded to the Cloud Platform Appliance. For information, see About Authority Delegation.
To add an IPv4 fixed address:

  1. Navigate to the network to which you want to add a fixed address, and then select Fixed Address from the Add drop-down menu.
    or
    From any panel in the DHCP tab, expand the Toolbar and click Add -> Fixed Address -> IPv4.
  2. In the Add IPv4 Fixed Address wizard, select one of the following and click Next:
    • Add Fixed Address
      or
    • Add Fixed Address using Template

Click Select Template and select the template that you want to use. Note that when you use a template to create a fixed address, the configurations of the template apply to the new address. The appliance automatically populates the fixed address properties in the wizard. You can then edit the pre-populated properties.

  1. Complete the following:
    1. Network: Click Select Network. When there are multiple networks, Grid Manager displays the Select Network dialog box from which you can select one.
    2. IP Address: Enter the IPv4 address for the fixed address, or click Next Available IP to obtain the next available IP address. For information about obtaining the next available IP address, see About the Next Available Network or IP Address. Note that for Cloud Network Automation, Next Available IP is not available if the fixed address you want to create is within a delegated range.
    3. If the network of the IP address is served by a Grid member, Grid Manager displays the AssignIPAddressby section. Select one of the following to match your criteria:
      • MAC Address: Select this to assign a fixed address to a host with the MAC address that you specify here. Enter the MAC address in the field. For MAC address format, see Configuring IPv4 Fixed Addresses.
      • DHCP Client Identifier: Select this to assign a fixed address to a host with the DHCP client identifier that you specify here. In the field, enter the client identifier of the host to which you want the DHCP server to assign this IP address. The client identifier must be unique within the network.
        • Match null (\0) at beginning of DHCP client identifier: This is enabled when you select DHCP client identifier. Select this when a DHCP client sends a \000 prefixed to the DHCP client identifier. \0 is the null character. Some DHCP clients (for example, Microsoft) send the client identifier in a \000foo format (with the null character prefix instead of just foo). The client identifier for the requesting host and the client identifier stored in the appliance must match.
      • DHCP Relay Agent: Select this to assign a fixed address to a host with the circuit ID or remote ID you specify here. From the drop-down list, select Circuit ID or Remote ID, and then enter the ID in the field. For information about circuit IDs and remote IDs, see About the DHCP Relay Agent Option (Option 82). You can enter the ID in hexadecimal format, such as ex:aa, ab, 1f:cd, or ef:23:56, or in string format, such as abcd or aa:gg. The appliance matches the value you enter here with the value sent by the DHCP client in counted octet sequence format. For information about how to use hexadecimal values, see DHCP Option Data Types. The ID is case sensitive and can contain up to 230 characters. Regardless of the entry you enter here, you can define the logging format for the circuit ID and remote ID when Grid Manager displays them in the detailed lease information page. For information about how to configure the logging format, see 21594150 21594150.

Note: You cannot use the same circuit ID or remote ID for different fixed addresses if the addresses are in the same network or the same shared network.

d. Name: Enter a name for the Fixed Address. This field is required if the network is served by a Microsoft server. For information, see Adding Fixed Addresses/Microsoft Reservations.

e. Comment: Optionally, enter additional information about the fixed address.

f. Disabled: Select this if you do not want the DHCP server to allocate this IP address at this time.

The Cloud section appears when the Cloud Network Automation license is installed on the Grid Master. For information, see Deploying Cloud Network Automation. This section displays the following information:

  • Cloud Usage: This field indicates whether this object is associated with any specific cloud extensible attributes or within a scope of delegation. It can be one of the following:
    • Cloud from adapter: Indicates that this object has been created by a cloud adapter and it may or may not be within a scope of delegation at the moment.
    • Cloud from delegation: Indicates that this object is within the scope of delegation or the object itself defines a scope of authority delegation, and it is not created by a cloud adapter.
    • Used by cloud: Indicates that this network or network container is associated with the extensible attribute Is External or Is Shared and the value is set to True, which implies the network is a private or shared network managed by the CMP, and it is not Cloud from adapter or Cloud from delegation.
    • Non-cloud: The object is a regular NIOS object and is not within the scope of any authority delegation nor is it associated with any of these extensible attributes: Cloud API Owned, Is External or Is Shared. NIOS admin users can modify this object based on their permissions.
  • Owned By: A cloud object can be owned by the Grid Master or the cloud adapter. When the object is created by the Grid Master, this shows Grid. If the object is created by the cloud adapter, this shows Adapter.

Delegate authority from the Grid Master

    • Delegate To: This field indicates whether the authority for the object you want to create has already been delegated. If so, it displays the name of the delegation.

4. (Optional) Click Next to configure or override DHCP options as described in About IPv4 DHCP Options.

5. (Applies only to Network Insight) This step is not required for creating a new Fixed Address. In the following Wizard step, you can optionally define the following identification values and settings for the new object's port reservation:

    • Choose the Device Type: Router, Switch-Router, Switch, MSFT (Microsoft) Server, NetMRI, NIOS, VNIOS, or ESX (VMware) Server.
      The values on this page are not required for defining the actual port reservation in a later wizard step.
      Certain device types could be descriptively relevant based on the type of object you are creating. As an example, the MSFT Server designator helps identify the new object as a Microsoft Hyper-V Host. The ESX Server designator can be used to identify the new object as a VMware ESX Host. These values are not required and will not affect the functionality of the object.
    • Choose the Device Vendor: Cisco, Juniper, Aruba, Dell, Infoblox, or HP.
    • You can also enter a Location and a Description. These values are advisory and not required for configuration.
      After you define this group of settings, you can also define a device port reservation, which is done in a later step. This is not required for the Fixed Address object creation.

6. Click Next to initiate or disable discovery of the new Fixed Address. (Applies only to Network Insight) This step is not required for creating a new Fixed Address.

    1. Choose either Exclude from Network Discovery or Enable Immediate Discovery. If you choose to Exclude, discovery will not execute on the fixed IP address. If you choose Enable Immediate Discovery, discovery will execute on the object after you save your settings. You may also choose to leave both options disabled.
    2. By default, the new fixed address object inherits its SNMP credentials from those defined at the grid level. Should you wish to override them for a local set of credentials, check the Override Credentials check box and select the SNMPv1/SNMPv2 or SNMPv3 option and enter the locally used credentials.
    3. You may also test the entered SNMP credentials by clicking Test SNMP Credential.

Note: For descriptions of SNMP credentials for discovery, see the section Configuring SNMP1/v2 Credentials for Polling and Configuring SNMPv3 Properties. These Grid-based values are inherited, by default, by each new object you create.

  • For the new object, you can check the Override CLI Credentials check box to override the inherited set of CLI credentials taken from the Grid level. This set of credentials may be used for the device that is directly associated with the new object in its port reservation.
  • You can also click Test CLI Credentials to enter and test a set of CLI login credentials against a device based on its IP address.
    Port control operations require CLI credentials for the involved devices. (If you are not using port control for the new object, usage of CLI credentials is optional.) Because some IPAM and DHCP objects will use port control features as part of object creation, CLI credentials are automatically leveraged as part of discovery. Ensure you have the correct sets of CLI credentials for devices in your network. For more information, see the section Configuring CLI Discovery Properties.
  • SSH is the default for CLI operations. Check the Allow Telnet check box if you know the device involved in the object assignment may support Telnet but may not support SSH, or if you want Telnet as an option.

Note: All port configuration operations require CLI credentials to be entered into Grid Manager. Because some IPAM and DHCP objects will use port control features as part of object creation, CLI credentials are automatically leveraged as part of discovery. Ensure you have the correct sets of CLI credentials for devices in your network.

7. Click Next to define port connectivity for the device port that will be associated with the new object. This step is not required for creating a new Fixed Address. This feature set is also termed portcontrol in the NIOS/Grid Manager system. The device whose interface the new Fixed Address will be associated should already be discovered by Network Insight.

    • After choosing the device, choose the Interface with which the port reservation will be bound. The drop-down list shows only interfaces that are most recently found to be available by Grid Manager during the last discovery cycle.
    • The Wizard page also shows a list of any VLANs that are currently configured in the chosen device (The following VLANs are configured). This Wizard page allows only the assignment of an existing VLAN in the chosen device to the new port reservation.
    • Check the Configure Port check box to define port control settings for the port reservation.
    • Choose the Data VLAN and/or the Voice VLAN settings you may need for the port assignment. Depending on the selected device, you may or may not be able to apply VLAN settings.
    • Set the Admin Status to Up if you need to activate the port after assignment in the current task.
      All port control operations require CLI credentials to be configured. Because some IPAM and DHCP objects will use port control features as part of object creation, CLI credentials are automatically leveraged as part of discovery and definition of port configurations such as Admin Up/Down status. Ensure you have the correct sets of CLI credentials for devices in your network.
    • Enter a Description for the port assignment. Infoblox recommends doing so to help other technicians to recognize the port assignment task.

8. Click Next to enter values for required extensible attributes or add optional extensible attributes. For information, see Using Extensible Attributes. When you create a new fixed address whose authority is delegated to a Cloud Platform Appliance, the required cloud extensible attributes and their values are automatically populated.

9. As the final step in the Add Fixed Address wizard, you define when Grid Manager creates the new object by scheduling it. You also schedule when the associated port control task executes (if a port configuration is specified).

    • To create the new object and its associated port configuration immediately, select Now. Grid Manager synchronizes the port reservation task to take place at the same time as the activation of the new object.
    • You can choose to have Grid Manager execute the port reservation task at the same time as the Fixed Address object creation. To do so, select At same time as Fixed Address.
    • You can choose to have Grid Manager execute the port reservation task at a later time by selecting Later. Choose a Selected time by entering or selecting a Start Date (click the calendar icon to choose a calendar date) and a Start Time, and choose a Time Zone.

     10. Choose one of the following from the Save&... drop-down button menu:

    • Click Save & Close to add the new object and close the wizard (this is the default).
    • Click Save & Edit to add the new object and launch the editor.
    • Click Save & New to add the new object and launch the wizard again to add another Fixed Address object.

Note: At any step during the wizard, you can click Schedule for Later to schedule the task. In the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Tasks. You cannot schedule this task when you are creating an object that is within a delegated scope.

For information on viewing fixed addresses and other DHCP objects, see Viewing IPv4 DHCP Objects.

Modifying IPv4 Fixed Addresses

To modify the settings of a fixed address:

  1. From the Data Management tab, select the DHCP tab -> Networks tab -> Networks section -> network -> fixed_address check box, and then click the Edit icon.
  2. The Fixed Address editor contains the following tabs from which you can modify settings:
    • General: You can modify the fields, except the network address, as described in Adding IPv4 Fixed Addresses.
    • Device Information: Define general identity/type information for the type of device to which your new object connects. For more information, see step 5 in the previous section, Adding IPv4 Reservations.
    • Discovery: Checking the Enable Discovery check box informs NIOS to begin discovering the fixed address after you click Save and Close. You manage discovery polling settings local to the fixed address from this page. For a complete overview of features on this page, see Discovering Devices and Networks and its subsections.
    • IPv4 DHCP Options: You can keep the inherited DHCP options or override them and enter unique settings for the fixed address. For information, see Defining IPv4 DHCP Options.
    • IPv4 Discovered Data: Displays the discovered data of the fixed address. For information, see Viewing Discovered Data.
    • Port Reservation: Review and edit any device port reservations that may be defined for the current object, or create a new port reservation and schedule it. For a closer look, see the section Port Control Features in Network Insight, and steps 4-8 in the section Adding IPv4 Fixed Addresses.
    • Extensible Attributes: Add and delete extensible attributes that are associated with a specific network. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes. You can edit values of inheritable extensible attributes by double clicking on the respective column. If an extensible attribute has an inherited value, then the cell is highlighted in blue when you perform an inline editing.
    • Permissions: This tab appears only if you belong to a superuser admin group. For information, see Managing Permissions.

     3. Optionally, you can click Toggle Advanced Mode to display the following tabs from which you can modify advanced data.

    • IPv4 DDNS: You can keep the inherited DDNS settings or override them and enter unique settings for the fixed address. Note that you must click Override and select Enable DDN Supdates for the DDNS settings you configure in this tab to take effect. For information, see Enabling DDNS for IPv4 and IPv6 DHCP Clients.
    • IPv4 BOOTP/PXE: You can keep the inherited BOOTP properties or override them and enter unique settings for the fixed address. For information, see Configuring IPv4 BOOTP and PXE Properties.
    • IPv4 Filters: You can keep the inherited IPv4 logic filters or override them and add a new IPv4 logic filter. For information, see Applying Filters to DHCP Objects.

Note that Grid Manager displays both the basic and advanced tabs the next time you log in to the GUI.

     4. Save the configuration and click Restart if it appears at the top of the screen.

Note: At any step during the wizard, you can click Schedule for Later to schedule the task. In the Schedule Change panel, enter a date, time, and time zone. For information, see Scheduling Tasks. You cannot schedule this task when you are creating an object that is within a delegated scope.

Deleting Fixed Addresses

To delete a fixed address within the DHCP range:

  1. From the Data Management tab, select the DHCP tab -> Networks tab -> Networks section -> network -> fixed_address check box or check boxes. You cannot delete multiple fixed addresses at the same time if the authority for one of the fixed addresses is delegated to a Cloud Platform Appliance.
  2. Select Delete from the Delete drop-down list.
  3. In the Delete Confirmation dialog box, do the following:
    • Delete associated leases with the fixed address (selected fixed IP address): When you clear this check box and click Yes, the appliance changes the status of the associated leases from Static to Active. When you select this check box and click Yes, the appliance deletes all the leases associated with the fixed address.

Note: NIOS removes all the static leases associated with a fixed address when you delete a fixed address out of the DHCP range, regardless of the selection of the Delete associated leases with the fixed address (selected fixed IP address) check box in the Delete Confirmation dialog box.

To schedule the fixed address deletion:

  1. From the Data Management tab, select the DHCP tab -> Networks tab -> Networks section -> network -> fixed_address check box.
  2. Select Schedule Delete from the Delete drop-down list.
  3. In the Schedule Deletion dialog box, complete the following:
    • Delete Now: Select this to delete the object upon clicking Delete Now.
    • Delete Later: Select this to schedule the deletion at a later date and time. Complete the following:
      • Date: Enter the date in YYYY-MM-DD (year-month-day) format. The appliance displays today's date. You can also click the calendar icon to select a date from the calendar widget.
      • Time: Enter the time in hh:mm:ss AM/PM (hours:minutes:seconds AM or PM) format. You can also select a time from the drop-down list by clicking the time icon.
      • Time Zone: Select a time zone for the scheduled date and time from the drop-down list. This field displays the time zone of the browser that the admin uses to log in to Grid Manager.
    • Delete associated leases with the fixed address: Select this check box to delete all the leases associated with the fixed address.
  4. Click Schedule Deletion.

The appliance performs the deletion at the scheduled date and time, and puts all deleted objects in the Recycle Bin, if enabled. You can restore the objects if necessary.

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