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Barracuda CloudGen Firewall

How to Configure DHCP IP Address Reservations

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To reserve the same IP address for known DHCP clients, configure IP address reservations using MAC to IP address mapping. IP address reservations are configurable in the simple and advanced DHCP service setup. DHCP reservations must reside outside of the DHCP range.

Before You Begin

  • Configure the DHCP service. For more information, see How to Configure the DHCP Service.
  • (optional) Configure advanced DHCP subnets and address pools. For more information, see Advanced DHCP Settings.
  • Identify the IP addresses to be mapped to your client's MAC addresses. The MAC address of a client can be found on the DHCP tab in the Hardware-Address column:
    DHCP_MAC_Add.png

Configure IP Address Reservations for Simple DHCP Setup

  1. Go to CONFIGURATION > Configuration Tree > Box > Virtual Servers > your virtual server > Assigned Services > DHCP > DHCP Enterprise Configuration.
  2. In the left menu, select Operational Setup IPv4.
  3. In the left menu, expand the Configuration Mode and click Switch to Advanced View.
  4. Click Lock.
  5. In the Subnets table, open the DHCP subnet configuration. The Subnet window opens.
  6. In the Reservations table, click + and add the client.
    ip_res_02.png 
  7. (optional) Specify a Name for the IP address reservation and click OK.
  8. Enter the Reserved IP for the client.
  9. (optional) Enter the DHCP Client Identifier that identifies the host client when requesting an IP address.
  10. Enter the MAC Address of the client.
    ip_res_03.png 

  11. Click OK.
  12. Click OK.
  13. Click Send Changes and Activate.

Configure IP Address Reservations for Advanced DHCP Setup

  1. Go to CONFIGURATION > Configuration Tree > Box > Virtual Servers > your virtual server > Assigned Services > DHCP > DHCP Enterprise Configuration.
  2. In the left menu, expand the Configuration Mode section, and click Switch to  Advanced View.
  3. In the left menu, select Operational Setup IPv4 or 6.
  4. Click Lock.
  5. Enable Use Advanced Pool Configuration and configure DHCP subnets and address pools. For more information, see How to Configure DHCP Subnets and Address Pools.
    ip_res_04.png 
  6. In the left menu, select Known Clients.
  7. In the Client Groups table, edit your client group, or click + and add client group members. For more information, see How to Configure Known Clients.
  8. In the Clients table, click + and add the client that should have a fixed IP address assigned.
    ip_res_05.png 
  9. Enter a Name for the client and click OK. The Clients window opens.
  10. (optional) Enter the DHCP Client Identifier that identifies the host client when requesting an IP address.

  11. Enter the MAC Address of the client.
  12. From the MAC Type list, select the type of network card requesting a lease.
  13. In the Fixed IP Addresses field, enter the static IP address(es) that are assigned to the client.
    ip_res_06.png 
  14. Click OK.
  15. Click OK.
  16. Click Send Changes and Activate.
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