AXIS 231D/232D - System Options 37
Network - Basic TCP/IP Settings
IP Address Configuration- the IP address of the Network Dome Camera can be set automatically via DHCP, or a fixed IP address can be set manually. DHCP is enabled by default. To use a fixed IP address, you must also enter the correct subnet mask and default router.
Notes: • DHCP is a protocol for automatic IP address assignment on a network. IP address assignment via DHCP may lead to the situation where the IP address changes and you lose contact. Configure the options for notification of IP address change (under Services) to receive notification from the network camera when the IP address changes.
•Alternatively, if your DHCP server can update a DNS server, you can access the AXIS 231D/232D by host name which is always the same, regardless of the IP address.
For more information, please refer to the online help files 
Services
Options for notification of IP address change - if the IP Address for the Network Dome Camera is changed e.g. automatically by DHCP, you can choose to be notified of the change. Click Settings... and enter the required information.
AXIS Internet Dynamic DNS Service - If the AXIS 231D/232D Network Dome Camera has been registered with the Axis Internet Dynamic DNS service and the IP address for the product changes, the service is updated to reflect the change. Check the box to enable/disable automatic updates.
The domain name currently registered at the Axis Internet Dynamic DNS service for your product can at any time be removed. To do this click Settings... and follow the instructions.
For more information, please refer to the online help files 