You can do the following to manage DHCP filters:

• Modify filter settings. For information, see 26481593.
• View a complete list of filters, MAC address items, and match rules. For information, see 26481593
• Delete filters that are not in use. For information, see 26481593

Modifying DHCP Filters

To modify a filter:

1. From the Data Management tab, select the DHCP tab -> Filters tab -> filter_name checkbox, and then click the Edit icon.
2. For a MAC address filter, the DHCP MAC Filter editor provides the following tabs from which you can modify information:
   • General: Modify the fields as described in Defining MAC Address Filters.
   • DHCP Options: Add or delete DHCP options. For information, see Defining MAC Address Filters.
   • Extensible Attributes: Add or delete extensible attributes that are associated with a specific DHCP range. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes.
   • Permissions: This tab appears only if you belong to a superuser admin group. For information, see About Administrative Permissions.

For a relay agent filter, the Relay Agent Filter editor provides the following tabs from which you can modify information:

• • General: Modify the fields as described in Defining Relay Agent Filters.
  • Extensible Attributes: Add and delete extensible attributes that are associated with a specific DHCP range. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes.

For an option filter (IPv4/IPv6), the Option Filter editor contains the following tabs from which you can modify information:

• • General: Modify the fields as described in Defining Option Filters.
  • Rules: Modify the match rules as described in Defining Option Filters.
  • DHCP Options: Modify option spaces and DHCP options in the Basic tab as described in Defining Option Filters. You must define the PXE Lease Time in the Advanced tab.
  • BOOTP: Modify BOOTP settings as described in Configuring IPv4 BOOTP and PXE Properties. The BOOTP settings are available only for IPv4 Option Filter. 
  • Extensible Attributes: Add or delete extensible attributes that are associated with a specific DHCP range. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes.

For a DHCP fingerprint filter, the Add IPv4 Fingerprint Filter editor provides the following tabs from which you can modify information:

• • • General: Modify general information, such as the name and device class, as described in Defining DHCP Fingerprint Filters.
    • Fingerprints: Add or delete DHCP fingerprints as described in Defining DHCP Fingerprint Filters.
    • Extensible Attributes: Add and delete extensible attributes that are associated with the DHCP fingerprint filter. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes.

For a NAC filter, the NAC Filter editor contains the following tabs from which you can modifying information:

• • • General: Modify the name and comment.
    • Rules: Modify the rules as described in Defining NAC Filters.
    • DHCP Options: Add or delete DHCP options. For information, see Defining NAC Filters.
    • Extensible Attributes: Add and delete extensible attributes that are associated with a specific DHCP range. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes.

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

You can modify the MAC address filter items and match rules for corresponding MAC address filters and option filters. For information, see 26481593 and 26481593.

Modifying MAC Address Filter Items

To modify a MAC address filter item:

1. From the Data Management tab, select the DHCP tab -> Filters tab -> filter_name -> mac_filter checkbox, and then click the Edit icon.
2. The MAC Address Filter Item editor contains the following tabs from which you can edit data:
   • General: Modify the fields as described in Adding MAC Address Filter Items.
   • Registration: Modify registration settings as described in Adding MAC Address Filter Items.
   • Extensible Attributes: Add or delete extensible attributes that are associated with a specific DHCP range. You can also modify the values of extensible attributes. For information, see Using Extensible Attributes.
3. Save the configuration and click Restart if it appears at the top of the screen.

Viewing DHCP Filters

To view DHCP filters:

1. From the Data Management tab, select the DHCP tab -> Filters tab.
2. Grid Manager displays the following for each filter:
   • Name: The name of the filter.
   • Filter Type: The filter type.
   • Comment: The information about the filter.
   • Site: The location to which the filter belongs. This is one of the predefined extensible attributes.

Viewing MAC Address Filter Items

To view a list of MAC addresses in a specific MAC address filter:

1. From the Data Management tab, select the DHCP tab -> Filters tab -> filter_name.
2. Grid Manager displays the following:
   • MAC Address: The DHCP fingerprint information of client's device. This field is displayed only when users use captive portal for authentication. MAC address assigned to the filter.
   • Username: Grid Manager displays the username to which the MAC address belongs in the lease viewers.
   • Comment: The information you entered about the filter item.
   • Expiration Time: The expiration time you configured for the MAC address.
   • Fingerprint: The DHCP fingerprint information of client's device. This field is updated when users use Captive Portal for authentication.
   • Site: The location to which the filter belongs. This is one of the predefined extensible attributes.

Deleting Filters

You can delete a filter that is not currently assigned to a DHCP range. You can also remove a filter from a DHCP range, and then delete the filter if it is not in use.
To delete a filter:

1. From the Data Management tab, select the DHCP tab -> Filters tab -> filter_name, and then click the Delete icon.
2. In the Delete Confirmation dialog box, click Yes.

The appliance puts the deleted filters in the Recycle Bin, if enabled. You can later restore the filter if needed.

To schedule this task, click the Delete icon -> Schedule Delete. In the Schedule Deletion dialog box, click Delete Later, and then specify a date, time, and time zone.