46D-Link DIR-869 User ManualSection 4 - Conffguration - Router ModeL2TPChoose L2TP (Layer 2 Tunneling Protocol) if your Internet Service Provider(ISP) uses a L2TP connection. Your ISP will provide you with a username andpassword.L2TP Server IPAddress:Enter the L2TP server IP address provided by your ISP.Username: Enter the username provided by your ISP.Password: Enter the password provided by your ISP.Reconnect Mode: Select either Always-on, On-Demand, or Manual.Maximum IdleTime:Enter a maximum idle time during which the Internet connectionis maintained during inactivity. To disable this feature, enable Auto-reconnect.Advanced SettingsAddress Mode: Select Static IP if your ISP assigned you the IP address, subnet mask,gateway, and DNS server addresses. In most cases, select Dynamic IP.Dynamic IPPrimary DNSServer:Enter the primary DNS server IP address assigned by your ISP.Secondary DNSServer:Enter the secondary DNS server IP address assigned by your ISP.MTU: Maximum Transmission Unit - you may need to change the MTU foroptimal performance with your ISP. The recommended setting is Auto.