Static provisioning of unique subscriber ID including interface description

You can configure DHCP local server and DHCP relay agent to concatenate the interface description with the username during the subscriber or client authentication process. Use the interface-description statement to include either the logical interface description or the device interface description. The interface description is separated from the other username fields by the specified delimiter, or by the default delimiter "." when you do not specify a delimiter. The specified delimiter must not be part of the interface description.