Traffic Sampling and Forwarding Configuration

To configure forwarding options and traffic sampling, include statements at the [edit forwarding-options] hierarchy level:

[edit forwarding-options]

accounting group-name {

    output {

        cflowd [ hostnames ] { 

            aggregation {

                autonomous-system;

                destination-prefix;

                protocol-port;

                source-destination-prefix {

                    caida-compliant;

                }

                source-prefix;

            }

            autonomous-system-type (origin | peer);

            port port-number;

            version format;

        }

        flow-active-timeout seconds;

        flow-inactive-timeout seconds;

        interface [ interface-names ] {

            engine-id number;

            engine-type number;

            source-address address;

        }

    }

}

family family-name {

    filter {

        input filter-name;

    }

    flood {

        input filter-name;

    }

}

hash-key {

    family inet {

        layer-3 ;

        layer-4 ;

    }

    family mpls {

        label-1;

        label-2;

        payload {

            ip;

        }

    }

}

helpers {

    bootp {

        description description-of-service;

        interface interface-group {

            description description-of-interface;

            maximum-hop-count number;

            minimum-wait-time seconds;

            no-listen;

            server [ addresses ];

        }

        maximum-hop-count number;

        minimum-wait-time seconds;

        server [ addresses ];

    }

    domain {

        description description-of-service;

        server address < [ routing-instance routing-instance-names ] >;

        interface interface-name {

            description description-of-interface;

            no-listen;

            server address < [ routing-instance routing-instance-names ] >;

        }

    }

    tftp {

        description description-of-service;

        server address < [ routing-instance routing-instance-names ] >;

        interface interface-name {

            description description-of-interface;

            no-listen;

            server address < [ routing-instance routing-instance-names ] >;

        }

    }

    traceoptions {

        file {

            files number;

            size bytes;

        }

        flag flag;

        level level;

    }

}

monitoring group-name {

    family inet {

        output {

            cflowd hostname { 

                port port-number;

            }

            export-format cflowd-version-5;

            flow-active-timeout seconds;

            flow-export-destination {

                collector-pic;

            }

            flow-inactive-timeout seconds;

            interface interface-name {

                engine-id number;

                engine-type number;

                input-interface-index number;

                output-interface-index number;

                source-address address;

            }

        }

    }

}

next-hop-group [ group-names ] {

    interface interface-name {

        next-hop [ addresses ];

    }

}

port-mirroring {

    input {

        family inet {

            rate number;

            run-length number;

        }

    }

    output {

        interface interface-name {

            next-hop address;

        }

        no-filter-check;

    }

    traceoptions {

        file filename {

            files number;

            size bytes;

            (world-readable | no-world-readable);

    }

}

sampling {

    disable; 

    input {

        family inet {

            max-packets-per-second number;

            rate number ;

            run-length number ;

        }

    }

    output {

        cflowd hostname {

            aggregation {

                autonomous-system;

                destination-prefix;

                protocol-port;

                source-destination-prefix {

                    caida-compliant;

                }

                source-prefix;

            }

            autonomous-system-type (origin | peer);

            (local-dump | no-local-dump);

            port port-number;

            source-address address;

            version format; 

        }

        file {

            disable;

            filename filename;

            files number;

            size bytes ;

            (stamp | no-stamp);

            (world-readable | no-world-readable);

        }

        flow-active-timeout seconds;

        flow-inactive-timeout seconds;

        interface [ interface-names ] {

            engine-id number;

            engine-type number;

            source-address address;

        }

    }

    traceoptions {

        file filename  {

            files number;

            size bytes ;

            (world-readable | no-world-readable);

        }

    }

}

This chapter describes the following tasks for configuring traffic sampling and forwarding options:

• Minimum Traffic Sampling or Forwarding Configuration
• Configure a Forwarding Table Filter
• Configure Traffic Sampling
• Configure Discard Accounting
• Configure Flow Monitoring
• Configure a Next-Hop Group
• Configure Per-Flow Load-Balancing Information
• Configure the Router or Interface to Act as a DHCP/BOOTP Relay Agent
• Configure DNS and TFTP Packet Forwarding
• Disable Traffic Sampling
• Examples: Configure Traffic Sampling
• Configure Traffic Sampling Output
• Trace Traffic Sampling Operations
• Configure Flow Aggregation (cflowd)
• Configure Port Mirroring