Introduction to L2TP VPN Address Pool

LNS assigns the IP addresses in the address pool to users. After the client has established a connection to LNS successfully, LNS will choose an IP address along with other related parameters (such as DNS server address, WINS server address, etc) from the address pool, and assigns them to the client.

L2TP provides fixed IP addresses by creating and implementing IP binding rules. The static IP binding rule binds the client user to a fixed IP address in the address pool. Once the client has established a connection successfully, the system will assign the binding IP to the client. 

When LNS is allocating IP addresses in the address pool, the system will check whether an IP binding rule is configured for the client. If configured, the system will assign the bound IP addresses to the clients. Otherwise, the system will assign IP addresses by choosing from the address pool.