====== Support for subscribers with a single IPv4 address and an IPv6 subnet binding or with dynamically assigned IP addresses ======
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Service and channel management for subscribers with dynamically assigned IP address is performed by a codemane (LOGIN), which is specified in the [[dpi:dpi_components:platform:subscriber_management:subsman_cmd|control commands]] by corresponding ''--login'' long option.
To support the DPI login binding feature you need to [[dpi:dpi_components:platform:dpi_admin:admin_db#Activating the built-in database|activate the UDR]].

If the dynamic IP addresses assignment is performed by the Radius server, it is recommended to use the "Radius event monitor", which will automatically transmit to the dpi the information on the IP addresses being assigned and released. In this case, the User-Name attribute in the Radius requests is used as a login.

To integrate with other platforms, it is necessary to support the custom scripts triggered by the events of IP address assignment and releasing (for example, this feature is present in the standard dhcp linux server). In this case, the IP address and LOGIN binding as well as the deletion of the bind are performed using special commands.

IP address and LOGIN bind
<code bash>
fdpi_ctrl load --bind --user subscriber_name:ip_address
</code>  

The example:
<code bash>
fdpi_ctrl load --bind --user test_user:191.168.1.1
fdpi_ctrl load --bind --user test_user:2a00:0:0:0:7aac:c0ff:fea7:d4c/64
</code>

To delete the IP <-> login bind
<code bash>
fdpi_ctrl del --bind --login subscriber_name
</code>  

To list the binded subscriber IP address 
<code bash>
fdpi_ctrl list --bind --login subscriber_name
</code>  

To list all the subscribers having binded IP
<code bash>
fdpi_ctrl list all --bind
</code>  

The next section discusses the binding of subscribers with an arbitrary IP addresses number.
An important difference between bind semantics and bind_multi one is:
  - ''load --bind'' replaces the address previously assigned to the subscriber, while load --bind_multi adds it
  - ''load --bind'' automatically takes the assigned address from another subscriber
  - ''load --bind'' uses the database more efficiently