Layer 2 Tunneling Protocol Services Configuration Guidelines

The Layer 2 Tunneling Protocol (L2TP) enables you to set up client services for establishing Point-to-Point Protocol (PPP) tunnels across a network and negotiate Multilink PPP if it is implemented. To configure L2TP services, you include the following statements at the [edit services l2tp] hierarchy level of the configuration:

[edit services]

l2tp {

    tunnel-group name {

        hello-interval seconds;

        hide-avps;

        l2tp-access-profile profile-name;

        local-gateway address address;

        maximum-send-window packets;

        ppp-access-profile profile-name;

        receive-window packets;

        retransmit-interval seconds;

        service-interface interface-name; 

        syslog {

            host hostname {

                services severity-level;

                facility-override facility-name;

                log-prefix prefix-number;

            }

        }

        tunnel-timeout seconds;

    }

    traceoptions {

        debug-level level;

        filter {

            protocol name;

        }

        flag flag;

        interfaces interface-name {

            debug-level level;

            flag flag;

        }

    }

}

You configure other components of this feature at the [edit access] and [edit interfaces] hierarchy levels. Those configurations are summarized in this chapter; for more information, see the JUNOS System Basics Configuration Guide or the JUNOS Network Interfaces and Class of Service Configuration Guide.

This chapter contains the following sections:

• L2TP Services Components
• L2TP Minimum Configuration
• Configuring L2TP Group Properties
• Configuring the Logical Interface Identifier
• Tracing Layer 2 Tunneling Protocol Operations
• Example: Configuring L2TP Services