This article provides ADSL configuration examples when getting started with SRX. For other topics, go to the SRX Getting Started main page.

Configure ADSL.

This section contains the following:

• Overview
• Basic ADSL Configuration Example
• Complete ADSL Configuration Example
• Technical Documentation
• Verification
• Troubleshooting

Overview

• VPI
• VCI
• Encapsulation

Basic ADSL Configuration Example

The following example illustrates a configuration with the following settings:

• ATM-over-DSL interface is at-1/0/0.
• Encapsulation type is Ethernet over ATM on DSL logical interface.
• ATM virtual path identifier (VPI) is 1.
• DSL operating mode for ATM-over-ADSL interface is set to autonegotiate settings.
• Logical interface is 0.
• Encapsulation type for the ATM-for-ADSL logical unit is PPP over Ethernet over ATM LLC.
• ATM virtual channel (VCI) of 32.
• IPv4 address and prefix of 10.10.16.1/24.

NOTE: If you are using encapsulation "ppp-over-ether-over-atm-llc" then it would give a commit error.Please check KB26158: [SRX]Explanation of the 'Warning: Can't configure protocol family with encapsulation ppp-over-ether-over-atm-llc' commit error [juniper.net] for more details.

Complete ADSL Configuration Example

This example uses the following settings:

• ADSL is the primary WAN interface in the untrust zone.
• A 3G is the backup interface, monitoring the primary ADSL (at) interface.
• A dialup interface (external modem) is used as a failover.
• The at-1/0/0 and pp0.0 interfaces are in the untrust zone.
• For pp0.0, point-to-point is configured.
• PAP is configured,using the passive option.
• The PPPoE underlying-interface and client options are configured.
• All Ethernet ports are in a single VLAN group with a DHCP server providing service.
• A default route to the DSL interface is configured.
• Source NAT is enabled.

system {
    host-name SRX210;
    name-server {
        20.20.222.222;
        20.20.220.220;
    }
    services {
        ssh;
        telnet;
        web-management {
            http {
                interface vlan.0;
            }
            https {
                system-generated-certificate;
                interface vlan.0;
            }
        }
        dhcp {
            domain-name example.net;
            router {
                192.168.0.1;
            }
            pool 192.168.0.0/24 {
                address-range low 192.168.0.100 high 192.168.0.199;

            }
        }
    }
    syslog {
        archive size 100k files 3;
        user * {
            any emergency;
        }
        file messages {
            any critical;
            authorization info;
        }
        file interactive-commands {
            interactive-commands error;
        }
    }
    max-configurations-on-flash 5;
    max-configuration-rollbacks 5;
    license {
        autoupdate {
            url https://ae1.juniper.net/junos/key_retrieval;
        }
    }
}
interfaces {
    interface-range interfaces-trust {
        member ge-0/0/0;
        member ge-0/0/1;
        member fe-0/0/2;
        member fe-0/0/3;
        member fe-0/0/4;
        member fe-0/0/5;
        member fe-0/0/6;
        member fe-0/0/7;
        unit 0 {
            family ethernet-switching {
                vlan {
                    members vlan-trust;
                }
            }
        }
    }
    cl-0/0/8 {
        traceoptions {
            flag all;
        }
        modem-options {
            init-command-string "AT&C1";
        }
        dialer-options {
            pool 1 priority 23;
        }
    }
    dl0 {
        unit 0 {
            family inet {
                negotiate-address;
            }
            dialer-options {
                pool 1;
                dial-string 1234;
            }
        }
    }
    at-1/0/0 {
        encapsulation ethernet-over-atm;
        atm-options {
            vpi 0;
        }
        dsl-options {
            operating-mode auto;
        }
        unit 0 {
            encapsulation ppp-over-ether-over-atm-llc;
            vci 0.35;
            backup-options {
                interface dl0.0;
            }
        }
    }
    pp0 {
        traceoptions {
            flag all;
        }
        unit 0 {
            point-to-point;
            ppp-options {
                pap {
                    default-password "$ABC123"; ## SECRET-DATA
                    local-name "[email protected]";
                    local-password "$ABC123"; ## SECRET-DATA
                    passive;
                }
            }
            pppoe-options {
                underlying-interface at-1/0/0.0;
                client;
            }
            no-keepalives;
            family inet {
                negotiate-address;
            }
        }
    }
    vlan {
        unit 0 {
            family inet {
                address 192.168.0.1/24;
            }
        }
    }
}
routing-options {
    static {
        route 0.0.0.0/0 next-hop pp0.0 metric 0;
        route 0.0.0.0/0 next-hop dl0.0;
    }
}
security {
    nat {
        source {
            rule-set trust-to-untrust {
                from zone trust;
                to zone untrust;
                rule source-nat-rule {
                    match {
                        source-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {
                            interface;
                        }
                    }
                }
            }
        }
    }
    screen {
        ids-option untrust-screen {
            icmp {
                ping-death;
            }
            ip {
               source-route-option;
               tear-drop;
            }
            tcp {
                syn-flood {
                    alarm-threshold 1024;
                    attack-threshold 200;
                    source-threshold 1024;
                    destination-threshold 2048;
                    timeout 20;
                }
                land;
            }
        }
    }
    zones {
        security-zone trust {
            host-inbound-traffic {
                system-services {
                    all;
                }
                protocols {
                    all;
                }
            }
            interfaces {
                vlan.0;
            }
        }
        security-zone untrust {
            screen untrust-screen;
            host-inbound-traffic {
                system-services {
                    all;
                }
            }
            interfaces {
                at-1/0/0.0;
                pp0.0;
                dl0.0;
            }
        }
    }
    policies {
        from-zone trust to-zone untrust {
            policy default-permit {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
    }
}
poe {
    interface all;
}
vlans {
    vlan-trust {
        vlan-id 3;
        l3-interface vlan.0;
    }
}

Technical Documentation

Verification

Verifying DSL Interface Configuration

Troubleshooting

2017- 10-24: Added note that ADSL is not supported from 15.1x49 and added reference link.
2020-02-26: minor non-technical edits.