Configuring flow exports on Juniper Routers

This section gives the steps to configure cflowd/J-Flow export on Juniper devices.To enable sampling and to export the flow records to specific destination address, follow the below command:

forwarding-options {
   sampling {
       input {
           family inet {
               rate 100;
               run-length 9;
               max-packets-per-second 7000;
           }
       }
       output {
           cflowd <destination address>{
               port <port number>;
               source-address <source address>;
               version <version number>;
               no-local-dump;
               autonomous-system-type origin;
           }
       }
   }
}

To enable packet sampling on the particular interface(s), from which flow analyzis to be done follow the below steps:

interfaces {
ge-1/3/0 {
vlan-tagging;
unit 101 {
vlan-id 101;
family inet {
sampling {
input;
output;
}
address 206.80.253.26/25
}
}
}
}

For more information, refer here and this link ( to configure V9 Template record).