The DS-Lite function is supported by all models except the .
License Requirements
The DS-Lite function is not license-controlled.
Restrictions
By default, the FW does not generate user network routes (UNRs) for addresses in the DS-Lite NAT address pool. The UNRs, like black-hole routes, can prevent routing loops and can be imported and advertised by dynamic routing protocols, such as OSPF. You can run the route enable command in the address pool view to enable the generation of UNRs. Therefore, no black-hole route needs to be manually configured for source NAT. For the DS-Lite NAT server, if the protocol and port number are specified, a black-hole route with the destination address being a public IP address needs to be configured to discard packets that are destined to the public IP address but do not match any entry in the server mapping table, preventing routing loops.