Configure the DHCP service and specify a network range from which the IP address for the clients will be assigned. In the advanced settings for DHCP, you can configure additional service availability settings,and set up HA synchronization.
Configure the DHCP Service
- Go to CONFIGURATION > Configuration Tree > Box > Assigned Services > DHCP-Service > DHCP Enterprise Configuration.
- Click Lock.
- In the left menu, select Operational Setup IPv4 or 6.
- In the Address Pool Configuration window, enable DHCP.
- Click + to add an entry to the Subnets table .
- Enter a descriptive name for the subnet and click OK. The Subnets configuration window opens.
From the Used Subnet list, select one of the available IPv4 subnets or select explicit and enter the IP address in the Network Address field.
- In the DHCP Server Identifier field, enter the IP address of the server. This IP address is provided to the client.
- Click + to add a new entry to the Pool Ranges table.
- Specify the following for each range:
- IP Begin – The first IP address in the network range. E.g.:
10.10.10.20
- IP End – The last IP address in the network range. E.g.:
10.10.10.40
- IP Begin – The first IP address in the network range. E.g.:
- Click OK.
- (optional) Add MAC to IP address mappings to the Reservations table:
- Enter the Reserved IP for the client.
Enter the MAC Address of the client.
- Enter the Reserved IP for the client.
- Click OK.
- In the Router table, add the default gateway IP address. E.g.:
10.10.10.100
- In the DNS Servers table, add the DNS server IP address. E.g.:
10.10.10.100
- Enter the Domain Name if the client range is part of a domain.
- Enter the NIS Domain Name and specify the details required for all servers that should be assigned.
- In the Static Route Net table, click + to add static routes that the client should install in its routing cache. If there are multiple routes to the same destination, list them in descending order of priority.
- In the Static Route Net field, enter the destination IP address.
- In the Static Route GW field, e nter the IP address of the router.
- Click OK .
- Enter the TFTP Server Name i f the 'sname' field in the DHCP header has been used for DHCP options.
- Enter the TFTP Server IP Address for Cisco CallManager devices. In this field, you can enter a comma-delimited list of addresses.
- Enter the Boot File Name i f the 'file' field in the DHCP header has been used for DHCP options.
If you set the Barracuda Network Access Clients Policy of an Address Pool to Barracuda Network Access Clients or guests , add the required info to the Access Control Service IPs/Names table for a client to receive valid policy server information.
- For information on dynamic DNS configuration, refer to How to Configure DHCP with Dynamic DNS .
- For information on lease configuration, refer to How to Configure DHCP Parameter Templates .
- Click OK.
- Click Send Changes and Activate.
Check the DHCP Server Status
Click the DHCP Tab to check the real-time status of the configured DHCP server.
Configure Advanced DHCP Settings
- Go to CONFIGURATION > Configuration Tree > Box > Assigned Services > DHCP-Service > DHCP Enterprise Configuration .
- From the left Configuration Mode menu, select Switch to Advanced View.
- Click Lock.
- In the left pane, select Operational Setup IPv4 or 6.
- In the Address Pool Configuration window, enable DHCP.
- Enable Use Advanced Pool Configuration. This disables the Subnets section and allows configuration of address pools.
- In the DHCP Server Identifier field, enter the name of the server. This name is provided to the client.
Enable Server Is Authoritative.
Select the UDP Listen Port on which the DHCP server listens for DHCP requests. By default, the server listens on port 67.
- For an HA setup, edit the settings in the HA Synchronization Setup section to synchronize the DHCP database between both units:
- Enable HA Synchronization to synchronize the DHCP database between the HA units.
- Specify the HA synchronization interval if required (default: 300 seconds).
- Click Send Changes and Activate.